EATON Detroit Spring

The leading manufacturer of leaf and coil springs for the street rod and restoration automotive industries

We Help Maintain American Icons by Manufacturing Leaf and Coil Springs Right Here in America

Phone: 1 (313) 963-3839
Fax: 1 (313) 963-7047

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      We have been manufacturing springs for American vehicles for over 80 years. Our process and expertise has been continuously refined and improved over the century and our Spring Tech section reflects some of that specialty knowledge.

      Browse our many articles, watch videos produced in partnership with AutoRestoMod, and learn all about your spring suspension here.

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MENUMENU
  • Home
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    • Learn About Leaf & Coil Springs
      • Spring Tech Articles
      • Tech Questions
      • Spring Tech Videos
      • Featured Elsewhere
      • EATON Detroit Spring Podcast
      • Buy Ford Manuals
    • Spring Tech 101

      We have been manufacturing springs for American vehicles for over 80 years. Our process and expertise has been continuously refined and improved over the century and our Spring Tech section reflects some of that specialty knowledge.

      Browse our many articles, watch videos produced in partnership with AutoRestoMod, and learn all about your spring suspension here.

    • Browse By Topic
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  • Click to Call Now: 1 (313) 963-3839

Should I Replace One Broken Leaf Or Whole Spring?

Q – “I have a 1966 Imperial with one broken leaf. Should I replace just the broken leaf or the whole spring or both springs”? A – We find in very few cases that once the old spring is taken apart that the rest of the leaves are any good. Age and use takes its […]
Related Categories
  • Leaf Springs
  • Spring Troubleshooting
Read This Answer

When & Whether To Powdercoat, Chrome, or Paint Your Springs

What's the best way to finish my springs: Powder coating, painting or chroming?
Related Categories
  • Modifying Springs
Read This Answer

Mono-Leaf Springs Generally Not Recommended

Do you manufacture lowering mono-leaf springs for my 1955 Bel-Air?
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  • Leaf Springs
  • Ordering Springs
Read This Answer

Removing Leaves Causes Handling Issues

Should I remove spring leaves to make my vehicle sit level?
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  • Leaf Springs
  • Modifying Springs
  • Ride Quality
Read This Answer

Axle Pads and Converting to Multi Leaf Springs

Where should I put my axle pads?
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  • Attaching Parts
  • Installing Springs
  • Modifying Springs
Read This Answer

How Important Is The Spring Saddle?

How should I fix my straight axle bump steer?
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  • Installing Springs
  • Leaf Springs
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How To Remove Bushings

I tried burning out my bushings and it didn't seem to work. I didn't ruin my springs did I? How should I continue?
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  • Attaching Parts
  • Installing Springs
  • Leaf Springs
  • Modifying Springs
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Rearching C1 Corvette Springs

I have Corvette leaf springs with grooves. Can we restore them or should I have new ones fabricated?
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  • Leaf Springs
  • Manufacturing Springs
  • Modifying Springs
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Camaro Rear Height: Will New Springs Settle?

I ordered some springs but they don't seem to be quite like the original. Why is this?
Related Categories
  • Installing Springs
  • Leaf Springs
  • Ride Height & Stance
Read This Answer

Stock Ride Height Is Too High, How Much Should I Cut My Front Springs?

Should I cut these coils, and how much should I cut them?
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  • Coil Springs
  • Modifying Springs
  • Ride Height & Stance
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Camaro Replacement Spring Options

I need some advice on which Camaro springs to get from someone who's been in the business. What are the differences between your offerings?
Related Categories
  • Leaf Springs
  • Ordering Springs
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Camaro Wheels Rubbing Due To Sagging Springs

I heard that springs never wear out, but my Camaro is rubbing at the wheel wells.
Related Categories
  • Installing Springs
  • Leaf Springs
  • Ride Height & Stance
  • Spring Troubleshooting
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How Do I Find The Springs I Need On This Website?

I can't find the springs I need online! Why is that?
Related Categories
  • Coil Springs
  • Leaf Springs
  • Ordering Springs
Read This Answer

Chromed Springs (A Disaster Waiting To Happen)

My chromed springs fatigued faster than grandma going up the stairs. Did chroming ruin my springs?
Related Categories
  • Leaf Springs
  • Modifying Springs
Read This Answer

Urethane and Rubber in Coil Spring Isolators and Bushings

Which isolator should I use? Is it the same material for the bushings?
Related Categories
  • Attaching Parts
  • Coil Springs
  • Leaf Springs
  • Ride Quality
  • Spring Manufacturing
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Why We Don’t Pre-Band Coil Springs

Can you compress the coil springs before you ship them?
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  • Coil Springs
  • Installing Springs
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Can Coil Springs Have Two Different Ends?

Can a spring be both tangential and square?
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  • Coil Springs
  • Spring Manufacturing
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Will Two Coil Spring Isolators Reduce Road Noise Further?

Is there an advantage to using coil spring isolators on the bottom as well as the top of springs?
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  • Attaching Parts
  • Coil Springs
  • Modifying Springs
  • Ride Quality
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How Do I Find The Rate and Load Of My Coil Springs?

How can you tell what the coil rate and load is for my `67 A-Body?
Related Categories
  • Coil Springs
  • Measuring Springs
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How To Test Coil Spring Ride Height With Stock Springs

Will fresh factory coils or longer coils gain me some height?
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  • Coil Springs
  • Measuring Springs
  • Ride Height & Stance
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How Do I Find The Right Coil Springs For My Mustang II Hot Rod?

My coil springs are rubbing on the the upper ball joint housing. Is this ok? What should I do?
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  • Coil Springs
  • Measuring Springs
  • Ordering Springs
  • Street Rod
Read This Answer

Reinstalling U-Bolts

Should I purchase new U-Bolts?
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  • Attaching Parts
  • Installing Springs
  • Leaf Springs
  • Replacing Springs
Read This Answer

Removing Bushings in Leaf Spring Eyes

How should I remove my old spring eye bushings?
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  • Attaching Parts
  • Installing Springs
  • Leaf Springs
  • Replacing Springs
Read This Answer

Reusing Old Leaves

Why are my springs sagging after the rebuild?
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  • Leaf Springs
  • Modifying Springs
  • Ordering Springs
Read This Answer

Ride Height Difference

How do I know the springs I ordered will sit my car with the right stance?
Related Categories
  • Leaf Springs
  • Ride Height & Stance
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Ride Height Problems

I put new shocks on my vehicle but it still isn't at the right height. What am I missing?
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  • Ride Height & Stance
  • Shocks
Read This Answer

Designing Special Trailer Springs

The leaf springs for my trailer are well beyond operational condition. Do you have original specs for my trailer springs or should I measure them myself?
Related Categories
  • Custom Design
  • Leaf Springs
  • Ordering Springs
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Why Are Spring Eye Bushings Wider Than The Spring?

The bushings are wider than the spring. Why is this?
Related Categories
  • Attaching Parts
  • Installing Springs
  • Leaf Springs
Read This Answer

How Much Will Springs Settle?

How much will springs settle shortly after installing? Learn how to judge your new spring installation by knowing exactly what to expect from a freshly manufactured set from EATON Springs.
Related Categories
  • Installing Springs
  • Restoration
  • Ride Height & Stance
Read This Answer

My New Coil Springs Are Falling Out, Is This Normal?

My mechanic says the new coil springs must not be right because the old ones were much more difficult to take out. Is this so?
Related Categories
  • Coil Springs
  • Installing Springs
  • Spring Troubleshooting
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Never Weld To A Spring

Some guy said you can replace a U-Bolt by welding his product to the main plate of a spring. It seems like a bad idea. Is it?
Related Categories
  • Leaf Springs
  • Modifying Springs
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Can I Use Mustang II Springs On A Corvair Suspension?

I'm looking to make my car a daily driver. Would Mustang II coils be a good choice?
Related Categories
  • Coil Springs
  • Ordering Springs
  • Ride Quality
  • Spring Manufacturing
  • Street Rod
Read This Answer

Studebaker Truck Springs

I saw a spring where the leaves were stacked in an odd manner. Does the stacking order matter with leaf springs?
Related Categories
  • Leaf Springs
  • Spring Manufacturing
Read This Answer

Trans Am Build Dates

How can I tell when my Trans Am was built so I can get the right springs?
Related Categories
  • Collector Car Tech
  • Ordering Springs
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Which Springs Have The Right Capacity For My Truck?

How should I choose which spring has the right capacity for my vehicle?
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  • Leaf Springs
  • Ordering Springs
  • Ride Quality
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Can I Use Rear Springs On The Front Of My Vehicle?

I installed rear springs at the front of my vehicle. It seems to be fine. Is there something I'm missing?
Related Categories
  • Installing Springs
  • Leaf Springs
  • Modifying Springs
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U-Bolt Torque

I'm torquing my spring's U-Bolt to factory specs but it's crushing my axle pads. Is this right?
Related Categories
  • Attaching Parts
  • Installing Springs
  • Leaf Springs
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U-Bolt Welding

I understand welding springs is bad. What about the U-Bolts next to the spring?
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  • Attaching Parts
  • Leaf Springs
  • Modifying Springs
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U-Joint Problem

Should U-Joints be replaced when installing new springs?
Related Categories
  • Attaching Parts
  • Leaf Springs
  • Spring Troubleshooting
Read This Answer

New Mainplate Won’t Lower Your Vehicle

I bought a pair of cruddy leaf springs. What can you do to fix them?
Related Categories
  • Leaf Springs
  • Modifying Springs
  • Ride Height & Stance
Read This Answer

Should I Use Variable Rate Coil Springs for a Van?

Can I use variable rate coil springs on my van?
Related Categories
  • Coil Springs
  • Ordering Springs
  • Ride Quality
Read This Answer

Are Welded Coil Springs Salvageable In Any Way?

My vehicle had coil springs welded to the lower perch. What should I do?
Related Categories
  • Coil Springs
  • Modifying Springs
  • Ordering Springs
  • Spring Troubleshooting
Read This Answer

Diagnosing Weird Arch In Spring: Missing Leaves

Dear Mike, I have a 1948 Chevrolet Fleetline Aerosedan two-door; lowered three Inches in the front by one Inch shorter coils and two Inch dropped spindles, and lowered four Inches in the rear by two Inch lowered reverse eye flattened springs and two Inch lowering blocks. My problem is this: the front and rear ride […]
Related Categories
  • Leaf Springs
  • Replacing Springs
Read This Answer

Choosing Correct Springs For Your ’71 Camaro

Good afternoon Mike, I recently purchased a 1971 Chevy Camaro with a 350 which someone had installed air shocks and what appears to be a new set of leaf springs, 4 possibly 5 leaf on it. I replaced the air shock with a set of standard premium gas charged ones. Unfortunately the back end of […]
Related Categories
  • Leaf Springs
  • Ordering Springs
  • Resto-Mod
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When Do I Install Coil Springs On A Hot Rod? What Do I Do Until Then?

Mike, I recently purchased a 1934 Ford 3 window coupe replica. To make a really long story short its an older kit that just never got put together, but in an excellent condition. My first order of business is to get a rolling chassis. The build book that was provided by the manufacturer calls out […]
Related Categories
  • Coil Springs
  • Custom Designing Springs
  • Manufacturing Springs
  • Street Rod
Read This Answer

Spring Width For 38 Plymouth

I have a 1938 Plymouth and I have heard that I should replace the springs that are 1.75-inches wide with ones that are 2.5-inches wide. Can the springs be made with narrow eyes so the existing hangers can be used? – Rick Rick, Yes, springs can be made wider with narrower eyes fit the hangers. […]
Related Categories
  • Leaf Springs
  • Replacing Springs
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48 Inch Springs, Hot Rod Rides Like A Truck

Mike, I have a 1938 Chevrolet Coupe Street rod with rear leaf springs which are 48 Inches long. Someone told me they are Dodge truck springs. And I believe them because the car rides like a truck. Do you have a spring that would make the car ride better and also get rid of the […]
Related Categories
  • Leaf Springs
  • Ride Quality
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Shocks Raise Rear Of ’56 Bel-Air

Mike, I have a stock 1956 Belair which is sitting kind of low in the rear. I have installed new Load Leveler shocks that raised the rear a little, but I need to raise rear another 1-2 Inches. Can this be done with just adding a leaf? The original springs appear to be OK, she […]
Related Categories
  • Leaf Springs
  • Replacing Springs
  • Restoration
  • Ride Height & Stance
Read This Answer

Diagnosing ‘Wiggle’ At High Speeds

Mike, First of all I want to thank you for letting me ask a question. I have a ’56 Belair with an LT-1, 700R Trans. This car did have a 454 in it when I got it. Anyway, since removing the 454 and installing the LT-1, I am having problems with the rear-end wiggling back […]
Related Categories
  • Leaf Springs
  • Restoration
  • Ride Quality
Read This Answer

Stiff Ride

Hi Mike, I have a 1965 Chevy Impala convertible that I am trying to find front & rear springs for. I purchased a set of springs that (with the help of all the other stuff) make the car ride like a lumber wagon, I have been told that the front spring rate is 403.9 and […]
Related Categories
  • Ride Quality
  • Shocks
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Shock And Springs Fight Each Other In A ’64 Straight Axle Vette

Howdy, I have a 64 vette, with a Strange Ford 9”. Yes, it’s a 64 straight axle car. Former drag car. It’s set up like a 62 for the leaf springs. I have 4 leaf springs on there now, which are for a 62, which I purchased from a local vette resto shop. They have […]
Related Categories
  • Custom Designing Springs
  • Leaf Springs
  • Manufacturing Springs
Read This Answer

Different Spring Rates Doesn’t Mean Different Ride Height

Mike, I have a 1966 Mustang Coupe with a 200ci engine and 3 speed manual transmission. Not a speed demon by any account. The rear end is sagging so I want to get a pair of leaf springs from Eaton. I’ve heard nothing but rave reviews from the Mustang forum I frequent. I’m undecided whether […]
Related Categories
  • Leaf Springs
  • Ride Height & Stance
Read This Answer

1966 Corvette F41 Suspension: Why Buy From EATON Detroit Spring?

Hi Mike, I’m in the market for a F41 Spring for my 1966 Corvette with F41 suspension. Currently the car has the original GM spring with the curled and notched ends. My concern is that it has obvious pitting under the paint and I’m afraid to re- use it. I have narrowed my choices down […]
Related Categories
  • Leaf Springs
  • Replacing Springs
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Springs & Air Bags

Mike, I have a 1968 Camaro Hardtop that I want to lower 2 Inches in the rear. I have headers and dual exhaust, which sometimes scrape on the driveway, so I want to install air bags to lift it as required. My question is, how does this affect the suspension and spring rate? Can I […]
Related Categories
  • Leaf Springs
  • Manufacturing Springs
  • Ride Height & Stance
Read This Answer

’69 Camaro Stock Leaf Count: Only Three Plates?

Mike, I have a 1969 Camaro with a 350, and a 4 speed. It has multi leaf springs but I only count 3 plates. I want to order from you new springs should I order 4 leaf heavy duty OR 5 leaf standard? I want the car to be close to its stock stances. John […]
Related Categories
  • Leaf Springs
  • Replacing Springs
Read This Answer

1969 Camaro Mono to Multi Leaf Conversion

Mike, I have a 69 Camaro coupe with monoleaf rear springs. Would like to convert them over to 4 leaf springs and would like to know if your conversion kit will work and not have any gaps in-between the shock plate and the spring perch ? And does it require the rubber pads? Thanks, Steve […]
Related Categories
  • Leaf Springs
  • Replacing Springs
Read This Answer

We Help You Pick The Right Springs: 1971 Trans Am Leaf Spring

Mike, I am currently restoring a 1971 TA. I plan on replacing the rear springs but am having difficulty determining which ones are correct for my car. First off, all 1971 TAs came with the 455HO motor and F60x15 tires. When I do a search on your website using “Trans Am” under body style, the […]
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  • Leaf Springs
  • Replacing Springs
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My Nova Coils Are Too Stiff. How Do We Find Softer Rate Springs?

Mike, I have a ’72 Nova sub frame under my street rod and stock springs are way to stiff. Do you know what the spring rate of a stock Nova with a V-8 is and do you have softer front springs? – Ron Ron, The 72 Nova with a V8 used many different springs. The […]
Related Categories
  • Coil Springs
  • Replacing Springs
Read This Answer

Adding Leaves Vs Rearching or Replacing Leaf Spring

Mike, The car in question is a 1954 Studebaker Champion Regal 4-door, six cylinder 169 engine. I would like to raise the back of the car 1 to 2″, and I am considering adding a leaf on each side since I have to pull the rear springs off anyway for some work. – Ron Ron, […]
Related Categories
  • Leaf Springs
  • Ride Height & Stance
Read This Answer

Is Bottoming Out Caused By Shocks or Coil Springs?

Mike, I have a ’79 Camaro with 350 engine with A/C and I have replaced the shocks but still have problem with front end bottoming out when I hit a dip in the road going over 45mph. What do you recommend? Thanks – Fred Fred, Contrary to what many think, shocks do not hold up […]
Related Categories
  • Replacing Springs
  • Shocks
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Keep Your U-Bolts Properly Torqued! Broken Center Bolt

Know about your U-bolt torque. It'll save your springs!
Related Categories
  • Leaf Springs
  • Replacing Springs
Read This Answer

Gasser Handling

Mike: I have a 1948 British Ford Anglia that was raced in the ’60 Gasser Wars. I have extremely large polyglass tires (33.5″ x 19.5″ mounted on Weld Draglite 15″ x 15″ Aluminum Wheels) on the rear, and as soon as I get the vehicle up to 35 mph, the vehicle likes to rock and […]
Related Categories
  • Ride Quality
  • Shocks
Read This Answer

Grease Between Leaves

Q – Mike: I really enjoyed the opportunity to talk with you during the Silver Springs car show this past weekend. I have also looked at several of your articles on your web site and found them to be very interesting and informative. I also appreciate the T-shirt offer regarding the a discussion we had […]
Related Categories
  • Leaf Springs
  • Manufacturing Springs
  • Modifying Springs
Read This Answer

Greasing Leaf Springs

Mike, What effect does grease between the leaves of a pre-50 spring have please? Besides stopping them squeaking. Kind Regards, Mike Mike, If the springs are really pre-1950’s, the grease will help them slide against each other easier and help stop the squeaking. This means springs from the pre-1950’s, not a vehicle from pre-1950’s. Since […]
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  • Leaf Springs
  • Manufacturing Springs
  • Modifying Springs
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Why Is The Nose of My Unfinished Vehicle High After Installing New Coil Springs?

Q – Mike, I bought both front and rear springs for my KR from Eaton and I am not happy at all. Just look at the picture. The nose of my car is sticking way up in the air. This is crap. I was sent the wrong springs. What are you going to do about […]
Related Categories
  • Coil Springs
  • Resto-Mod
  • Ride Height & Stance
Read This Answer

Raising A 1966 GTO: Coil Springs Vs Air Shocks

Sir, I have a 1966 GTO with new coil springs installed; I have no idea what brand but the car appears to set to pretty much its stock height. I would like the car to sit a little higher in the rear verses the stock height. I thought about installing air shocks, but this car […]
Related Categories
  • Ride Height & Stance
  • Shocks
Read This Answer

How Complete Does My Car Need To Be Before It Sits Right On New Coil Springs?

Dear Mr. Eaton, I must let you know that I am a very unhappy customer. In August of 2009 I purchase both front and rear coil springs for my 1969 Pontiac GTO. Your sales person, Gary, seemed to be very knowledgeable at that time. He asked more questions about my car than any other parts […]
Related Categories
  • Coil Springs
  • Ride Height & Stance
Read This Answer

Why Is My Car Sit Higher With New, Stock Ride Height Springs?

Q -I ordered a set of coil springs so my 1969 GTO would sit 1 Inch lower. But when I put them on the car sat higher than it did with the old springs. How come? Don – New York A – Don, Remember when you placed the order with Gary he said asked how […]
Related Categories
  • Coil Springs
  • Ride Height & Stance
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Heavy Duty Coils

Q -Kind of a follow up question to last week’s email question, Ken from Lancaster, CA wrote and said he went to the local auto parts store and told them he wanted to raise his car about an Inch or two and they sold him heavy duty coil springs. But when he installed them the […]
Related Categories
  • Manufacturing Springs
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Extreme High Lift Springs

Mike, I am in need of some custom leaf springs made for a 20 Inch lift on my truck. Is this something you can do? I have checked with a lot of places and no one can help me. Can you? – Scott. Scott, You are about to add us to your list of those […]
Related Categories
  • Ride Height & Stance
Read This Answer

Hudson Street Rod

Hello Mike , I am asking for help with a problem I am having on a 1930 Hudson Street Rod. I mounted a Ford Mustang rearend on the original springs, and the springs flatten out with the weight of the car, no arch. With the spring flat the rear shackle hits the fender and wont […]
Related Categories
  • Custom Designing Springs
  • Leaf Springs
  • Manufacturing Springs
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Leaf Finish

Mike, Please can you inform what’s the best/correct finish for both the visible and invisible (IN THE STACK) parts of leaf springs? A couple of people I know insist on painting them totally including all in between the leafs, the normal for them bondaprimer / undercoat / enamel topcoat layers. (They do have to externally […]
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  • Leaf Springs
  • Manufacturing Springs
  • Modifying Springs
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Leaf Liners’ Effect on Spring Rate

Hi Mike, I just read your comment about Delrin inserts and it raised three more related questions I don’t believe I have ever seen answered. The first is, does using a full length insert change the thickness of the spring pack? Secondly, what effect do full length inserts have on spring rate? Finally, in general […]
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  • Leaf Springs
  • Manufacturing Springs
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Leaf Liners, Powder Coat & U-Bolt Torque

Mike, I wish I had read your tech page about two months ago. I just had my leaf springs powder coated and I’ve re-assembled the front springs with poly liners between the leafs. Am I correct in assuming that your advice for nothing to be between the springs also applies to these poly liners? If […]
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  • Installing Springs
  • Leaf Springs
  • Manufacturing Springs
  • Modifying Springs
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Reducing Inter-Leaf Friction: Leaf Lubricant or Leaf Liners & Tip Inserts?

Mike, I am overhauling a set of springs from a ’64 F250 that are in great shape. I’m getting a list together of hardware to order from you folks. I have read all your tips about coating/painting springs and not using grease between the leafs. My question is that I have heard some people recommend […]
Related Categories
  • Leaf Springs
  • Manufacturing Springs
  • Modifying Springs
Read This Answer

Why Do My Leaf Springs Look Different?

Mike, Bought a set of OEM rear leaf springs for my ’70 Boss 302 Mustang. I have no problem with the quality and specs of these springs but, when you advertized OEM correct replacement springs…. I was really disappointed when they arrived that they didn`t look the same in appearance detail as the factory units. […]
Related Categories
  • Collector Car Tech
  • Installing Springs
  • Leaf Springs
Read This Answer

Leaf Spring Clips

Q -Mike A quick questions for you. I purchased springs for all four corners of my ’70 Camaro Z28 last fall and have installed them. About the rear leaf springs, do the bands that hold the leafs together get removed after installing? Or do they stay there? I ask because I also have a ’66 […]
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  • Leaf Springs
  • Replacing Springs
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Leaf Spring Clips III

Mike, I am curious if there is a part that the leaf spring clamps play with regards to the function of a rear leaf spring? Is there a difference for instance on how many clamps are placed on a five leaf set up as opposed to a four leaf, and are the locations of the […]
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  • Leaf Springs
  • Manufacturing Springs
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Leaf Spring Length & Arch

Mike, When measuring a leaf spring, I assume that the front part and the rear part of the spring’s dimensions “When following the curve”of the spring is the same for both a standard arch spring & a high arch spring. If this is true, what happens to the rear shackle? I wouldn’t think that it […]
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  • Replacing Springs
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Leaf Spring Life Span

Q -Mike How long is the typical working life of a passenger car leaf spring? Should I be concerned about the primary leaf failing and possibly causing an accident? There are 5 leaves in the pack with at least one appearing broken at the center. The vehicle is a ’78 Plymouth Volare station wagon with […]
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  • Leaf Springs
  • Replacing Springs
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Leaf Spring Rust

Mike, I purchased some custom lowered springs from you this past summer. They came unpainted and I put them on my car without painting them. Over the weekend I was putting her away for the winter and noticed that the springs were rusting. Should I be concerned about the rust and if so, what should […]
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  • Leaf Springs
  • Manufacturing Springs
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Leaf Springs Changing Wheelbase

Mike, I had new rear mono leafs installed on my 1967 Camaro Convertible and the result is my wheelbase is now 1.25″ shorter. I had ordered (not from you guys unfortunately) leaf springs, could I have received the wrong ones? Do you have the measurements of your/the proper monos that I can compare against? I […]
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  • Leaf Springs
  • Replacing Springs
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Corvette Rear, Steel Spring Rearching and Fiberglass

Q -Mike, Hope you can give me some direction here. I have an ’81 Corvette that has one side lower than the other in the rear. The local shop replaced the rear tie bolts, but it still is tilting to one side. They think it is the leaf spring and recommends I replace it with […]
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  • Leaf Springs
  • Replacing Springs
  • Restoration
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Is There A Trade Off Between Comfort and Handling? (Also, Diagnosing a Leaning Bonneville)

Q – I’m interested in new springs for my 64 Bonneville. I bought new springs from XYZ Company 2 years ago and I’m not happy with the results. When I was having them installed the mechanic said one of the rear springs was bad so I got a replacement. I wanted a pair, but they […]
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  • Leaf Springs
  • Ride Height & Stance
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If Not Rear Springs, What Causes A Leaning GTO?

Mike, I purchased a set of new rear springs from you for my 1967 GTO and when I put them in the car leaned to the driver’s side about 3/4 of an Inch. The lean was there with the old springs but I thought the new springs would level it out. I even switched the […]
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  • Coil Springs
  • Leaf Springs
  • Restoration
  • Ride Height & Stance
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Do Lightened Front Ends Need Lower Springs or Drop Spindles?

Mike, I have a 1970 Firebird, Fiberglass fenders, hood and nose piece, no fender wells and the battery in the trunk. So I have lightened up the front end by about 175 – 200 Lbs. The car now sits up high in the front and what I want is for it to sit 2″ lower […]
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  • Ride Height & Stance
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How Do Lowering Springs Affect Ride Quality?

Mike, I want to lower my ’54 Ford but still keep it riding good, can this be done? -Jerry Jerry, Whenever a vehicle is lowered, there is a reduction in the amount of suspension travel. Because of this, the spring rate (how much weight it takes to deflect a spring one inch) is increased. Suspension […]
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  • Leaf Springs
  • Ride Height & Stance
  • Ride Quality
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Should I Cut Coil Springs or Use Dropped Spindles?

Mike: Hope you can help. I am in the process of rebuilding the front end of my ’57 Chevy car. If I use 2″ lowering springs, can I use the same front shocks or do I need to get something else? Would it be better to install the 2″ lowering spindles instead of the springs? […]
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  • Coil Springs
  • cutting coil springs
  • Ride Height & Stance
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Lowering Blocks

Q -Mike, I just bought a ’54 Chevy 2 door. It has 3″ lowering blocks and is – in my opinion- exactly 1″ too low in the back. I’m really not a bubble gum things together kind of guy and I believe, in most cases, lowering blocks are a version of Bazooka Engineering. Agree? Aluminum […]
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  • Ride Height & Stance
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Lowering a ’67 Chevy Nova Wagon

Mike, Okay you got my attention. I just read all of your website and now I am thoroughly confused. But I take your opinion over all the others because you are an expert. Here’s my dilemma. I have a ’67 Chevy Nova Wagon. It has all original, factory stock suspension, front and rear. It has […]
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  • Leaf Springs
  • Ride Height & Stance
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How Much Can Coils Lower My Resto-Mod, Should I Check The Alignment?

Mike, I have a ’55 Ford Fairlane Tudor Club Sedan that needs new front coil springs. I am going with a resto-mod approach. Better handling with a decent ride quality. The question I have is, can the front end be lowered by using shorter springs? Will this throw any alignment or other related issues off? […]
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  • Coil Springs
  • Ride Height & Stance
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Lowering Mono Leafs

Mike, Good morning, I have a street rod shop and retail parts store. I am building a ’68 Camaro, and looking for a lowering mono leaf springs for the rear. Can you help? Thanks – Bruce Bruce, We sure can. We make F and X Body mono-leaf springs with up to a 3 Inch drop. […]
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  • Leaf Springs
  • Ride Height & Stance
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Lubricating Leaf Springs

Mike, Several weeks ago I brought two rear leaf springs to you for service and repair. While there, you explained that automotive leaf springs shouldn’t be lubricated. There is currently a discussion of this going on in our internet discussion board. Our manuals (1940-50 era) tell us to grease the springs. You have said that […]
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  • Replacing Springs
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Monoleaf Mistake

Mike, I bought monoleafs for my truck 8 years ago, not knowing the down side of using them. They sat around for 4 years before I put them on. They sit too low for my taste. To make matters worse, I was sold rear monos with a 6″ drop instead of 4″. Now they are […]
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  • Leaf Springs
  • Manufacturing Springs
  • Replacing Springs
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Monoleaf Springs

Can mono-leaf springs be dangerous?
Related Categories
  • Custom Designing Springs
  • Leaf Springs
  • Manufacturing Springs
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Mono Leaf Springs

Mike, I want to install a set of mono leaf springs on my 1953 Ford f-100. I have a 383 Mopar with a 727 torque flight tranny. Will mono leafs support this unit safely? My friend has them on his with basically the same set up. His springs are straight out with no upward curve. […]
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  • Leaf Springs
  • Manufacturing Springs
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Stock Mono Leaf vs. Multi-Leaf Replacement

Is there an advantage to putting multi-leaf springs on a vehicle with mono-leaf springs?
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  • Leaf Springs
  • Replacing Springs
  • Restoration
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How Much And When Do Coil Springs Settle? (Also, How To Choose The Right Mustang II Springs)

How much can one expect the springs to settle after installation?
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  • Coil Springs
  • Custom Designing Springs
  • Manufacturing Springs
  • Ride Height & Stance
  • Street Rod
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Which Mustang II Front End Springs Should I Use?

The front springs on my street rod are sagging after installing a big block. How should I go about finding the right replacement springs?
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  • Custom Designing Springs
  • Manufacturing Springs
  • Street Rod
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How Are Ride Height Changes Calculated?

How do you measure ride height? What does plus/minus one inch actually mean?
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  • Coil Springs
  • Leaf Springs
  • Resto-Mod
  • Ride Height & Stance
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Diagnosing Severe Shimmy

The shimmy is so bad I have to stop the car to get the shimmy to stop. How should I fix this?
Related Categories
  • Ride Quality
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Panhard Bar

Do you really need a panhard bar?
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  • Ride Quality
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Pickup Ride Quality

I have a '52 pickup with mono-leaf springs. Is there any way I can make it ride softer?
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  • Leaf Springs
  • Ride Quality
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Powder Coating & Chroming Springs

Is powder coating, painting, or chroming the best way to finish springs?
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  • Replacing Springs
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Wheel Hop

What can I do to stop my wheel hop?
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  • Attaching Parts
  • Ride Quality
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Ziebart

Dear Mike, I was hoping that you would be able to enlighten me some on the leaf spring failure that occurred on my 1991 Jeep Grand Wagoneer. The vehicle has around 140,000 miles on the odometer and has never seen a Buffalo winter or been abused. A few weeks back I was on my way […]
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  • Leaf Springs
  • Replacing Springs
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Replacement Springs For Splitting A Wishbone

Mike, I would like to inquire about a front spring for a 1937 Ford Coupe, at this time it has an original front spring. I would like to know what my options might be. From a single spring, to a reverse eye spring, or anything else you may suggest. Let me give you a little […]
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  • Custom Designing Springs
  • Leaf Springs
  • Manufacturing Springs
  • Replacing Springs
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How Effective Wheel Weight Can Change What Springs You Need

Dear Mike, We met in Richmond, VA at the NSRA show last August. My car is a 1937 Packard convertible with Fat Man suspension and Mustang II coil springs. The springs had sagged to the point that the lower A-arms were not level but were going up toward each wheel. It had been suggested by […]
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  • Coil Springs
  • Custom Designing Springs
  • Manufacturing Springs
  • Replacing Springs
  • Street Rod
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How To Get Rid Of Airshocks On 1940 Ford?

I have a street rod that uses the frame of a 1980 Cutlass LS which I believe is called a GM G Body. The car is a 1940 Ford two door coach. It has the rear springs form the original ’80 Cutlass in it and they are too weak so I use air shocks to […]
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  • Coil Springs
  • Custom Designing Springs
  • Manufacturing Springs
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Axle Wrap Cause And Fix

Fixing and understanding axle wrap
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  • Leaf Springs
  • Manufacturing Springs
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Corvair Clip on a Street Rod, vs Mustang II

Mike, I have recently purchased a 1933 Chevrolet 4 door Street Rod, with an early ’70s 350 engine. The car was built in 1990 using a mid-60s Corvair front clip and ’72 Pinto rack and pinion steering. The front coil springs have 2 spacers and look really tired. What would you recommend as a replacement […]
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  • Manufacturing Springs
  • Street Rod
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Corvette Spring Pricing for OEM Quality Springs

Why are EATON Corvette springs more expensive than others?
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  • Leaf Springs
  • Manufacturing Springs
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Can I Cut Coil Springs With Pigtail Ends?

Q -Mike, I have a Riviera that I want lowered about 2 Inches in the rear. You don’t make lowered springs for this car, something about not enough demand. So what I want to do is cut the coils. Is this alright? Frank from Seattle A -Frank, in a lot of cases it is fine […]
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  • Coil Springs
  • cutting coil springs
  • Ride Height & Stance
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Cutting Coil Springs

Mike, I need to lower the front of my car approximately 1 to 1 1/2inches. I understood from your " Question of The Week "answer, that you would cut an Inch off the spring to lower it an Inch but people are telling me that I am reading that wrong and that I would have […]
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  • Coil Springs
  • cutting coil springs
  • Ride Height & Stance
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Will Stretching Then Cutting Coil Springs Increase Spring Rate While Maintaining Ride Height?

Mike, I cannot believe I finally found a spring expert! I have read all your tech articles and thank you very much for sharing your knowledge. Now for my question – Can you take an existing spring, stretch it and then shorten it to get a stiffer spring rate while keeping the car at the […]
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  • Coil Springs
  • cutting coil springs
  • Ride Height & Stance
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The Math Behind Cutting Coil Springs

Does cutting a coil change the spring rate?
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  • cutting coil springs
  • Manufacturing Springs
  • Ride Height & Stance
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How Do I Know If I Need To Replace My Coil Springs?

Dear Eaton Tech Person, I am rebuilding a 1978 Ford, 4×4, F150, Standard Cab, 400 cu In. engine, truck for a series of articles. Even though the vehicle’s front springs appear to be fine, and it was not overly low in the front end on teardown, I am considering the replacement of the springs. The […]
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  • Coil Springs
  • Replacing Springs
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Drilling a Spring Will Damage Your Drill

Mike, I just bought a new pair of springs from you folks for my 62 Falcon. I don’t have a warranty because I have a stroker motor installed. I installed the springs on my Falcon and noticed a decent amount of slop between my spring perch and the leaf spring center pin. I took the […]
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  • Leaf Springs
  • Manufacturing Springs
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I Cut My Coil Springs, Now They’re Too Stiff. Any Way To Correct This?

Mike, I purchased a set of your 2 Inch lowered springs for a 1979 AMC Pacer frontend that is installed on my 1954 3100 Pickup. To give it a more lowered stance my mechanic cut the springs, which in my opinion is to low but that is not the problem. It just rides way too […]
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  • Coil Springs
  • Ride Quality
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Engine Swap

Q-Mike, I am refurbishing a 1979 Firebird and removing the 403 engine. I am installing a Pontiac 455 with a/c and auto tranny. Estimated horsepower: 450. I will be replacing the coil springs and need advice on the additional weight requiring a stronger spring. If this isn’t enough information, just send me an email. This […]
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  • Replacing Springs
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Leaf Springs with Extreme Lift

Mike, I’m in need of some custom springs, and I’m trying to gather information from every company I can so as to get the best spring for the best price. I have a 1993 Jeep Cherokee, 4-dr, 4.0 I6 Engine, Automatic Trans, 4×4. I am wanting to lift my Jeep, and the lift I need […]
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  • Ride Height & Stance
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EZ Ride Shackles on 1967-71 F100

Mike, Your online listings for rear leaf springs to fit a 1966 F100 show springs with or w/o EZ ride shackles. Can you tell me what are/were EZ ride shackles? Is this an optional shackle that was offered by Ford at the time? How do I identify if my truck has them if it has […]
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  • Leaf Springs
  • Replacing Springs
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F150 Over Loads

Mike, I recently purchased from Eaton Spring new heavy-duty rear leaf springs for my 2003 Ford F-150 4WD pickup truck. I currently run a pair of Monroe Gas shocks on the rear.can you recommend an Eaton product that will provide more stability with heavy loads in the bed and towing heavy trailers. Regards – Rick […]
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  • Modern Vehicle
  • Ride Quality
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F-Body Leaf Springs

Good Morning, I have a 1967 Firebird that presently has a mono leaf spring and air shocks. I would like to get rid of the air shocks. The majority of the time the car is used for cruising with one or two people. However, sometimes my daughters ride with us to cruises. We also use […]
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  • Leaf Springs
  • Replacing Springs
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How Do I Find Firebird Front End Springs With The Right Spring Rate?

Mike: I have a 1976 Firebird front stub grafted to my 1936 Chevy. The stub has been narrowed 2 ½”, the drag link has been sleeved, and the engine moved back 11 Inches to accommodate the radiator. The front springs now are too stiff and carry the car like a 4 wheel drive vehicle. The […]
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  • Coil Springs
  • Resto-Mod
  • Ride Height & Stance
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Ford Woodie Leaning

Hi Mike, My woodie is a show car, all stock to Early Ford V8 standards. It lists low on driver’s side like a big guy has driven it daily for years, with no other weight or passengers along. I’ve not been able to locate any info on “leveling” the car. As you probably know it […]
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  • Leaf Springs
  • Replacing Springs
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Timbren

Mike, I recently purchased from Eaton Spring (about 8-12 mos. ago) new heavy-duty leaf springs for my 1989 Ford F-150 4WD pickup truck. I currently run a pair of Monroe Gas shocks on the rear. Can you recommend an Eaton product that will provide more stability with heavy loads in the bed and towing heavy […]
Related Categories
  • Ride Quality
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Do Heavy Duty Springs For ’63 Galaxies Change Ride Height?

Hello, I have a question about 1963 Ford Galaxie rear leaf springs. I was told that a 1963 Galaxie with 6 leaf spring packs sits 3 Inches lower than a car with 5 leaf spring packs. Do you agree with this? Thank you for your time, -Cliff Cliff, The one who is spreading this information […]
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  • Leaf Springs
  • Restoration
  • Ride Height & Stance
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Made In The U.S.A.

Mike, I recently bought a set of coil springs for my 1969 Camaro from you and someone is telling me you have them made in China. Is that true? I can’t find any info on your website or on the box I received them in. Gary Gary, All of our springs are MADE IN THE […]
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  • Manufacturing Springs
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