Will I need a Front diff drop (n/A for 2wd trucks)?

Whether or not a Differential Drop is needed will depend on the drive shaft angles following a lift. The more lift you get up front the more the drive shafts are pitched downward. The diff drop kits are designed to drop the front diff thus helping to elevate some if not all the angle gained. We do not include these kits in our suspension packages since most customers choose to forgo the installation of a diff drop; however, we do in fact carry these kits if interested in buying one.

What are rear shims and do I need them?

Shims come in various degrees and are used to correct the pinion angle following a lift. Generally speaking the higher the lift the higher degree shims are needed to bring the pinion angle back to factory. In order to properly shim the rear it is necessary to measure the angle before the lift is installed. Once the lift is installed you would measure again to determine the correct degree of correction needed. Since no two trucks are the same nor do lifts produce exact lift heights as its impractical to think everything is manufactured perfectly to spec, we do not include shims in our kits, but we certainly do carry them if needed.

The need of shims will both depend on whether or not the customer wants to try and maintain the factory angle and/or to help prevent issues that may arise as a result of lifting (most common issue being vibration).

What is a carrier bearing drop?

This is a spacer used to drop the carrier bearing down in order to help align both segments of the rear drive shaft following a lift. When a lift is added to the rear of the truck the second segment of the drive shaft is angled down more. With the front segment of the drive shaft having not been change and the second segment now angled down more this connection point (carrier bearing) may not operate as fluently during shaft rotation. This can lead to vibration as well as premature wear at the carrier bearing.