Should I purchase new U-Bolts?
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.
Removing Bushings in Leaf Spring Eyes
How should I remove my old spring eye bushings?
Reusing Old Leaves
Why are my springs sagging after the rebuild?
Ride Height Difference
How do I know the springs I ordered will sit my car with the right stance?
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?
Why Are Spring Eye Bushings Wider Than The Spring?
The bushings are wider than the spring. Why is this?
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?
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 […]
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 […]
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, […]
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 […]
Keep Your U-Bolts Properly Torqued! Broken Center Bolt
Know about your U-bolt torque. It’ll save your springs!
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
