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 […]
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.
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 […]
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 […]
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. […]
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. […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
Can mono-leaf springs be dangerous?
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 […]
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. […]
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. […]
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 […]
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 […]
Is there an advantage to putting multi-leaf springs on a vehicle with mono-leaf springs?
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 […]
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 […]
How do you measure ride height? What does plus/minus one inch actually mean?
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 […]
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 […]
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 […]
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 […]
I have a ’52 pickup with mono-leaf springs. Is there any way I can make it ride softer?
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 […]
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 […]
Is powder coating, painting, or chroming the best way to finish springs?