Abrasive Step Wear

Fig 1: Identifying Abrasive Step Wear

Courtesy of GENERAL MOTORS CORP.

The pattern on the roller ends is caused by fine abrasives.

1. Clean all of the parts and the housings.
2. Check the seals and the bearings.
3. Replace leaky seals, rough, or noisy bearings. Refer to WHEEL HUB, BEARING, AND SEAL REPLACEMENT in Front Suspension.