S10 Truck Pinion Alignment Shims (for all S-10s including 4-cylinder, 6-cylinder, and V8) sold by the pair

Why You Might Need One. Axle alignment shims are required to adjust driveline angles on swaps.  Advantages of improved driveline angles are: Reduced driveline vibration Less wear on driveline parts Better power transfer to the rear wheels Improved fuel mileage Why JTR Stealth? Several companies make pinion alignment shims. Most are made of cast aluminum or zinc and are too narrow to cover the entire width of the 2-1/2" wide leaf spring used on the S-10. When these 2" wide aluminum shims are installed on the cast or extruded lowering blocks, the shims (or the lowering blocks) will fail because only a small portion is supported by the hollow lowering blocks. See below. When the shims (or lowering blocks) break, the U-bolts can appear to loosen. Stealth Conversions alignment shims are 2-1/2" wide and made out of high-strength solid aluminum, which will not fail in service. Why Stealth Conversions Lowering Blocks? Note that the center hole of shims must be drilled out to 9/16. Some a