Cognito 210-90467 3 Degree Rear Pinion Angle Shim Kit | 1999-2018 GM Silverado/Sierra 2500HD/3500HD

Features:

• Corrects rear pinion angle
• Designed for 4-6 inch rear lifts
• Includes two 3 degree shims
• Comes with two center pins
• Ideal for short wheelbase trucks
• Fits 1999–2018 GM 2500HD/3500HD
• Compatible with 2WD and 4WD models
• Works with spring or straight block setups
• Improves driveline alignment and performance
• Durable steel construction for long life

Fix Your Driveline the Right Way

If you’re running a tall rear lift on your GM 2500HD or 3500HD and haven’t corrected the pinion angle, you might already be feeling the effects—vibration, binding, or even premature u-joint wear. The Cognito 210-90467 3 Degree Rear Pinion Angle Shim Kit is designed specifically to solve that issue. It’s a perfect fit for short wheelbase trucks with a 4 to 6 inch rear lift, especially in setups that use straight blocks or spring-only lifts without tapered correction. Whether you’re working with a single cab or an extended cab short bed, this shim kit helps get your driveline geometry back in check.

Complete Kit with Straightforward Install

The kit includes a pair of 3-degree steel shims and two center pins that make installation clean and secure. Once installed between your leaf packs and the axle, the shims rotate the rear pinion up to better align with your driveshaft. That means less strain on your u-joints and a smoother ride overall. It's compatible with both 2WD and 4WD configurations from 1999 to 2018, giving you the flexibility to use it across multiple GM HD platforms. Whether you're daily driving or hauling heavy loads, this simple upgrade can make a noticeable difference in how your truck feels and performs on the road.

Fits: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 GM Silverado/Sierra 2500HD/3500HD