What is the purpose of axle shims?

Axle shims are used to adjust the angle of your rear differential. This is often necessary after installing a lift kit to correct vibrations and ensure proper driveline alignment.

How are these shims installed?

These shims are installed between the rear leaf springs and the axle housing. They are designed to sit flat against the spring perch and the bottom of the spring pack.

What does the 4-degree taper mean?

The 4-degree taper indicates the angle at which the shim is cut. This specific angle is designed to rotate the rear axle housing, thereby changing the pinion angle to reduce driveline vibrations.

Specifications

Brand: Tuff Country
Part #: 90015
UPC: 698815900150

Tuff Country 4 Degree Axle Shims 3in Wide w/ 3/8in Center Pins Pair

Name: Tuff Country 4 Degree Axle Shims 3in Wide w/ 3/8in Center Pins Pair
Brand: Tuff Country
SKU: tuff-country-tuff-country-4-degree-axle-shims-3in-wide-w-3-8in-center-pins-pair-t14-654908
Price: 44.74 USD
Availability: BackOrder

$44.74

On Backorder

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Tuff Country 4 Degree Axle Shims Pair. Corrects rear differential angle to reduce vibrations after lift kit installation.

Key Features

This product includes a pair of 4-degree axle shims with 3/8-inch center pins.
The shims are designed to fit between the rear leaf springs and the axle.
Features a taper to rotate the rear axle.
Helps eliminate or lessen rear end vibration caused by lift kit installation.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

This pair of Tuff Country axle shims comes with a 4-degree taper and 3/8-inch center pins. They are designed to be installed between your rear leaf springs and the axle on most trucks and SUVs that use leaf spring suspension. These shims are specifically useful when you've installed a lift kit, as they help adjust the angle of your rear differential.

By changing the angle of the rear differential, these shims work to eliminate or at least lessen annoying rear-end vibrations that can sometimes occur after lifting a vehicle. The tapered design is key to rotating the rear axle just enough to get rid of that unwanted shaking.