EATON Detroit Spring

The leading manufacturer of leaf and coil springs for the street rod and restoration 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
  • Products
    • Suspension Parts
      • Leaf Springs
      • Coil Springs
      • Shocks
      • Attaching Parts And Hardware
      • Installation Kits
      • Leaf Spring Shackle Replacement Kits & Parts
    • Street Rod Suspension Parts
      • Mustang II Front End Springs
      • 48 Inch Truck Springs
    • Allstate - Chrysler
      • Allstate
      • American Motors
      • Bricklin
      • Buick
      • Cadillac
      • Chevrolet
      • Chevrolet Truck
      • Chrysler
    • Daimler - Ford
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      • Dodge
      • Dodge Truck
      • Edsel
      • Ford
      • Ford Truck
    • GMC - Jeep
      • GMC
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      • Hudson
      • Hudson Truck
      • Hummer
      • International
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    • Kaiser Darrin - Nissan
      • Kaiser Darrin
      • Kaiser-Frazer
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      • MG
      • Nash
      • Nissan
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      • Plymouth Truck
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      • Rambler
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      • Sterling
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      • Studebaker Truck
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      • Willys
    • Request A Custom Quote
    • Search For Parts Here
  • Spring Tech
    • 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
      • Leaf Springs
      • Coil Springs
      • Attaching Parts
      • Ride Height & Stance
      • Ride Quality
      • Manufacturing Springs
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      • Modifying Springs
      • Ordering Springs
  • About Us
    • About EATON Detroit Spring
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  • Click to Call Now: 1 (313) 963-3839

Leaf Spring Tech Articles, Videos, and More

Since 1937, we have manufactured leaf springs for the automotive industry, restorations, street rods, NASA, and even Oscar Meyer Wienermobiles. If you have a question about leaf springs, odds are we answered it below or would be happy to help.

Browse dozens of tech articles, videos, and answered questions from our Ask The Spring Guru page.

Why Lowering and Lifting Blocks Can Cause Axle Wind-Up

We all know the quickest and cheapest way to change the ride height of a leaf spring equipped vehicle is by using blocks between the axle and a spring. Heck, it can’t get any simpler. Remove the U-bolt, slip a block in, bolt her back up, and, wa-la, a new stance. But there’s a price […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Modifying Springs, Ride Height & Stance, Ride Quality

Torque Your Leaf Springs U-bolts Properly

The best way to describe torque is by saying it is the force required to twist off the cap of a beer bottle. And this theory applies to nuts and bolts also, but in reverse. In other words, torque is the force required to keep a nut and bolt tight. U-bolts provide the clamping force […]

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Leaf Springs

How To Fix Squeaking Leaf Springs

You’ve just spent some time installing your new set of Leaf Springs and you’re ready for a cold one. But when you push on the bumper, you hear a squeak! This makes you stop and think: Did I order the springs with the mouse option? Boy, I sure hope not. Is my rubber ducky stuck […]

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Installing Springs, Leaf Springs

Measuring Leaf Spring Free Arch

Measuring your current leaf springs right will ensure your replacement springs fit and perform just as you need. First tip: Don’t measure the arch from the floor! When measuring the free arch of a leaf spring, you want to be sure of doing it the right way. While standing the spring upside down on its […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Measuring Springs

Rubber Vs. Urethane Suspension Bushings

Bottom line: if you prefer comfort, go for rubber. If you need performance, go for urethane. Today’s subject is rubber versus urethane suspension bushings, and which are better. That answer depends on how the vehicle is to be used and what type of performance you desire. Rubber Bushings Rubber bushings are more compliant that is […]

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Leaf Springs, Ride Quality

Got Driveline Vibration? Check Your U-Bolts

One of the leading causes of driveline vibration is the over tightening of the U-joint U-bolts. The proper way to tighten these U-bolts is to turn the nut until the lock washer is flat, then turn the nut one-eighth of a turn and no more. Any more pressure will deform the bearing. If your U-joint […]

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Leaf Springs, Troubleshooting Springs

Which Direction Should Leaf Springs Be Bowed?

Leaf springs do their job whether they’re smiling or frowning. Some do their job with a completely flat expression. They all do their job well, if that was how the manufacturer designed it. A question we get asked many times is what way should my leaf springs be bowed on my vehicle? Should it be […]

Filed Under: Spring Tech Videos Tagged With: Installing Springs, Leaf Springs

How Leaf Spring Lowering Blocks Cause Axle Wind Up

Lowering a leaf spring suspension should be done correctly to avoid handling issues. Here’s why lowering blocks aren’t the magic bullet. Last week, we explained how reversing leaf spring eyes can lower a vehicle. This week, we’ll explain how using lowering blocks is not a good way to lower or raise a vehicle. Where the […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Ride Height & Stance, Troubleshooting Springs

Measuring Ride Height Drop From Reversing Leaf Spring Eyes

Reversing your leaf spring eyes will provide a drop, but exactly how much of a drop? Here’s how to calculate ride height drop when you reverse your spring eyes. Ride Height Difference From Reversing One Leaf Spring Eye If you have one eye reversed, the drop will be one half of the diameter of the […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Measuring Springs, Ride Height & Stance

How To Fix Squeaking Leaf Springs

There are two causes of leaf spring squeak: tight eye bolts or shackles, and mis-torqued u-bolts. You’ve just installed a new set of leaf springs, and you hear a squeak! The squeak could be coming from the springs, or they could be coming from somewhere else. But for now, let’s focus on how leaf springs […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Troubleshooting Springs

Rebound Clips Group Leaves To Make Them Stronger Together

Multi-leaf springs resist breaking thanks to rebound clips. Here’s why. What are those bands that are around your leaf springs? They are called rebound clips. A leaf spring does not break when it is being compressed, it breaks when the load is suddenly released. As the spring is being compressed with a load, each leaf […]

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Leaf Springs, Manufacturing Springs

All About Leaf Spring Centerbolts

Ever wonder the function of a leaf spring centerbolt? There are several more than you’d imagine! Have you ever noticed on every leaf spring there is a bolt holding all the leaves together? Even though on most springs the bolt is not in the middle of the spring, it is still called the center bolt. […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Measuring Springs

Get Your U-Bolt Torque Right

Torque is more than the force required to open a beer bottle. The proper torque will keep your leaf spring from breaking. Use your manufacturer’s torque specs when tightening your U-bolts, or use our recommendations. U-bolts provide the clamping force required to hold leaf springs to the axle and the right torque is very important. […]

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Installing Springs, Leaf Springs, Maintaining Springs

How To Properly Torque Your Leaf Spring’s U-Bolts

U-bolts are what provide the clamping force needed to hold your springs to the axle. Any movement in the center bolt area can cause a spring to break so follow your manufacturers recommendations. If that is unavailable, use our recommendations your springs will thank you. Remember, torque your bolts to the recommended specifications immediately upon […]

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Leaf Springs, Maintaining Springs

Five Keys To A Good Leaf Spring Suspension

Here are the five key factors to keep in mind when working with leaf spring suspensions for your classic car or hot rod. Making of a good leaf-spring suspension is pretty darn easy if five basic rules are followed. Use Multi-Leaf Springs Rule number one for making a good leaf spring suspension is the use […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Spring Tech 101

Installing Model A Leaf Springs

Model A springs need to be stretched around six inches before you’ll be able to install them into your vehicle. Rear Model A springs whether used on an original Model A, a street rod, or a restomod, can be a bugger to install. Not in the car, typical eye to eye length’s around 39 to […]

Filed Under: Spring Tech Videos Tagged With: Installing Springs, Leaf Springs

How To Readjust Tip Inserts Into Place

Sometimes tip inserts get whacked out of place during delivery. Here’s how to fix it with a screwdriver. Unfortunately, every now and then when leaf springs shipped through FedEx or UPS get banged around the tip inserts at the end of the spring can come out of the holes. To put them back in place, […]

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Installing Springs, Leaf Springs

Three Types of Leaf Spring

There are three types of leaf springs. Multi-Leaf Springs Multi-leaf springs are made up from heat treated strips of SAE 5160 Steel, in diminishing lengths, formed to a predetermined arch and held together by a bolt to the center. Mono-Leaf Springs Mono-leaf springs are a single heat treated plate of steel whose thickness is uniformly […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Manufacturing Springs

Leaf Spring Ends And Hysteresis

Which leaf spring end-type is best for trucks, and which end-type gives you the smoothest riding springs? There are three basic types: square, diamond point, and rolled. Square Ends Square, or constant thickness ends, are great for trucks, terrible for cars. It puts a concentration of all the pressure at the end of the leaf, […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Manufacturing Springs, Ride Quality

How To Paint Leaf Springs

First step, make sure it’s done in a well-ventilated area. Hang the spring by one of its eyes. Start by wiping the spring with acetone to remove any contaminates: grease oil dirt etc. Use a good quality high-temperature engine paint, color of your choosing, and give the springs three, four, or five light coats of […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Modifying Springs

How Easy Changing Leaf Springs Really Is

You’ve seen our leaf spring removal and reinstallation videos, but those are polished and edited for brevity. When you work on your springs yourself, you may find things don’t always go as smooth at the textbooks. This One Minute Monday is two minutes long to make a point.

Filed Under: Spring Tech Videos Tagged With: Installing Springs, Leaf Springs

How To Reinstall A Rear Leaf Spring

Watch as Mike explains the steps for how to install rear leaf springs. Start by putting in the front eye bolt. Do not tighten! Then attach the shackle again. Do not tighten! Raise the spring to the axle. Make sure the center bolt is in the hole. Install new U-bolts. Again, do not tighten. Reinstall […]

Filed Under: Spring Tech Videos Tagged With: Installing Springs, Leaf Springs

How To Remove A Leaf Spring

Block the tires! We don’t want to roll Raise the vehicle Place jack stands under the axle, both for safety and to keep the axle in place Remove the tire Remove the shock Remove the U-bolts Remove the rear shackle Remove the front eye bolt Voila! The spring will be in your hand.

Filed Under: Spring Tech Videos Tagged With: Installing Springs, Leaf Springs

What Are Tip Inserts Used For In Leaf Springs?

At the end of the leaves on many leaf springs, you’ll see what’s called tip inserts. The purpose of these inserts is to help reduce interleaf friction. Every manufacturer has their own idea on how they should look, how they should attach, and how they should be held in the spring. The video above has […]

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Manufacturing Springs

How To Use The Ordering Form

Here we show how you can use the online ordering form to have springs manufactured for your exact vehicle.

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Coil Springs, Leaf Springs, Ordering Springs, Shocks

How To Order Leaf and Coil Springs Online

Go to the ordering page here.

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Coil Springs, Leaf Springs, Ordering Springs, Shocks

How To Measure Leaf Spring U-Bolts

This week, Mike explains the two different types of U-bolts you may encounter and how to measure them. Let’s start with the shape. We have square, we have round. Square U-bolts typically go over the spring, the round U-bolts typically go over the axle. Let’s measure the U-bolt. First thing we need to know is […]

Filed Under: Spring Tech Videos Tagged With: Attaching Parts, Leaf Springs, Measuring Springs

Busting Suspension Myths Slideshow

2017 NSRA Education Days

Mike will be at the Kentucky Expo Center for the NSRA Street Rod Nationals this Thursday busting suspension myths to pieces. Preview his presentation below and be sure to catch it if you go!

Filed Under: Spring Tech Article Tagged With: Coil Springs, Collector Car Tech, Leaf Springs, Measuring Springs, Ride Height & Stance, Ride Quality, Shocks, Spring Terms

How We Make Our Leaf Springs (6 Minute Video)

Filed Under: Spring Tech Videos Tagged With: Leaf Springs, Manufacturing Springs

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 […]

Filed Under: Tech Question Tagged With: Leaf Springs, Spring Troubleshooting

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To find the correct springs for your vehicle, you need to provide as much information about your car as possible. There is no such thing as a one-size-fits-all spring.

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EATON Detroit Spring, Inc.
1555 Michigan Avenue
Detroit, MI 48216
Phone: 1 (313) 963-3839
Fax: 1 (313) 963-7047
Email: inquiries@eatonsprings.com

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