Steel shims to go between your leaf springs and your spring perch. These are used on leaf spring vehicles in order to adjust pinion angles and achieve proper drive line geometry. Our shims are 2.5" wide, machined from steel, and include a new set of 3/8" diameter center bolts. Select size (in degrees).
Use the calculator below to determine the right size shims. The shim calculator figures out the current joint angle, takes into account how much the drive shaft slope changes as a result of the shim, and aims to achieve a 2-3 degree net joint angle. The calculator is only for double cardan rear drive shafts. If you have something else or if you have questions, give us a call. 801-737-0757
These were perfect. I admittedly didn’t use the calculator since i was after a specific angle, but i’m sure it works well. Don’t mess with the cheap aluminum shims. I have 5/8 ubolts and once you torque them to around 150 or so ft lb the aluminum compresses and changes the angle slightly. If not right away within a few months or so. You’ll also get dissimilar metal corrosion as well with aluminum and steel axle/springs. Go with steel and forget about them. If you don’t have the time to do it right the first time when are you going to have time to fix it?
Well machined shims, long pins with heads that fit the axle perfectly. Now my pinion is aligned correctly and things are nice and smooth.
Great quality machined shims. Contacted the support team to double check my angles after placing my order and being on the fence about my shins (+/-1°). Shawn was very helpful in going over my set up and helping me make the right decision. Would recommend this to anyone
Do not be skeptical. It is worth the money and they are exceptionally manufactured/come with new/longer leaf pack bolts. Make your working angle measurements and use these steel shims or you will not repair your drive-line vibration. I used the calculator and got 5 degree shims, pinion angle ended on -2 degrees and my vibration is gone. Thank you Tom.
These shims are very solid. They measured exactly 3°. I ordered them because it’s hard to find 3° shims, and I needed exactly 3°. It’s a good shim, what is there to say?
I wrongly assumed that these might come with the most common sized center bolt for Jeep springs (5/16”). They came with 3/8” bolts. I didn’t bother calling for support because I was in a hurry, I just grabbed some locally. My fault for not asking before I ordered. It’s getting harder to find 5/16” center bolts, so I’m not even surprised that these came with a more popular size. You should probably add it to the product description.