Pro Comp Drive Shaft Shim Kit

A suspension lift changes more than ride height. It also changes the angles of the driveline, and that is where Pro Comp drive shaft shim kits come in. Pro Comp Suspension, which has long focused on lift kits for trucks and Jeeps, offers shim-based driveline correction parts built for the vehicles its lift systems are designed to raise. If you are browsing the wider Drive Shaft Shim Kit category, this page covers how Pro Comp's approach fits into it.

Why Driveline Angles Matter After a Lift

Raising a vehicle alters the relationship between the driveshaft and the pinion on the axle. When those angles drift too far from factory geometry, the usual symptoms are vibration at highway speed, accelerated U-joint wear, and stress on the carrier bearing. Shims are a simple, durable way to bring the geometry back in line without replacing the driveshaft itself.

Pro Comp Carrier Drop Kits for Two-Piece Driveshafts

Pro Comp's Driveline Alignment Kit is aimed at lifted trucks with a two-piece rear driveshaft. On these trucks, the carrier bearing that supports the center of the shaft needs to be spaced downward to follow the lifted chassis. Pro Comp's carrier drop kits are sold under part numbers such as 51255, 52700, 52480 and 59003B, and are matched to specific truck applications. For example, the 52700 kit is listed for 2004-2008 Ford F-150 applications, and the 51255 is cataloged for a wide range of late-model two-piece-shaft trucks, including Chevrolet Silverado 1500 models. Because fitment depends on the exact year, cab, and driveshaft configuration, always confirm the part number against your vehicle before ordering.

A commonly shared rule of thumb among owners installing carrier bearing shims is roughly a quarter inch of shim for every inch of rear lift, which makes a useful starting point before fine-tuning for vibration.

Pro Comp Degree Shims for Pinion Angle Correction

The second half of Pro Comp's offering is its degree shim line. These shims are designed to correct the driveshaft-to-pinion angle after a suspension lift, returning the driveline to something close to its original geometry. They are constructed from high-strength aluminum alloy and come in a range of angles, with part numbers such as 99-200 (2 degrees), 99-250 (2.5 degrees), 99-400 and 99-600, so you can match the correction to the amount of lift and axle rotation you are dealing with. Degree shims typically sit between the axle perch and the leaf spring, which is why they appear alongside leaf spring shims in many catalogs.

Choosing the Right Pro Comp Shim Kit

• Driveshaft type: Carrier drop kits are for two-piece driveshafts; single-piece setups usually call for degree shims at the axle instead.
• Lift height: Larger lifts generally need more correction, whether through a taller carrier drop or a steeper degree shim.
• Vehicle application: Check year, model, cab and bed configuration, and drivetrain, as these affect the part you need.
• Material and build: Pro Comp's degree shims use high-strength aluminum alloy, while the alignment kits are made from high-quality materials intended for long-term durability.

Backed by a Lift-Kit Specialist

Pro Comp backs its suspension products with the Pro Comp Promise, a replacement policy for products that break through no misuse, neglect or vandalism. Pairing a shim kit with a Pro Comp lift keeps the whole build coming from one suspension specialist. To see everything else the manufacturer makes, visit the Pro Comp brand page, or compare options across brands in the Drive Shaft Shim Kit category.