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 and 4" long, machined from steel, and include a new set of 3/8" diameter center bolts. Select size (in degrees). Measure the width of your springs to make sure they are 2.5" wide as this is not the stock width for some applications.
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
Worried that too much pinion angle will prevent your pinion bearing from getting oil?
This is a common concern, and one that makes a lot of sense at its surface. However, once you take a closer look at how the oil circulates through the differential you can see that as long as you have the right amount of oil in there the oil will go where the oil needs to go. This is demonstrated in the video below. The video primarily focuses on the need for rounded shape in the diff cover but it also shows you how the oil cycles through the differential.
The axle shim calculator on the Tom Woods site worked great, after installing them my pinion angle was perfect. Shims were high quality and worked perfect.
The terrible deceleration chatter was eliminated with these shims. The calculator was a huge help.
The required information was applied on Tom Wood website, measurements were taken and placed in the required angle calculator, and then shims were ordered, and they were installed on a 1991 Jeep Wrangler YJ, lift 2.5" And the vibration problem was completely resolved.
Made of steel and looks high quality, easy to install. I'm very happy . Thanks Tom Wood.
Shims arrived super fast and were made as they should be. Great quality product with fair price and fast service
Great quality, perfect fit, and fast delivery.