Transfer case bearing Kit (BW4430)

Common symptoms of failing BW4430 bearings include a whining or grinding noise coming from under the vehicle, especially during acceleration or deceleration. You might also feel unusual vibrations or shuddering during low-speed turns, which indicates the shafts aren’t being properly supported.

This kit is specifically designed for the BorgWarner BW4430 transfer case found in various Audi models. To ensure 100% compatibility, please verify that your transfer case tag says ‘BW4430’ or consult your mechanic before purchasing.

Replacing the bearings is a cost-effective way to restore your BW4430 transfer case if the gears and housing are still in good condition. New bearings restore shaft alignment and torque balance, potentially saving you thousands compared to a full unit replacement.

Transfer case rebuilds are complex and require specialized tools like bearing pullers and presses. Unless you are an experienced DIYer with a service manual, we recommend having a professional transmission shop perform the installation to ensure proper shimming and torque settings.

The BW4430 transfer case relies on precise shaft support to distribute torque between the front and rear axles. Worn bearings cause shaft play, which leads to gear misalignment, increased heat, and eventually catastrophic failure of the internal chain or clutches.