A flat spot exists on the differential drive gear or the ring gear teeth.

Replace the differential drive pinion gear and the ring gear set.

Spicer Eaton call 1-800-TCM-HELP

Meritor 1-800-535-5560

A flat spot exists on the bearing.

Replace the bearing.

Spicer Eaton call 1-800-TCM-HELP

Meritor 1-800-535-5560

The differential drive pinion gear splines are worn.

Replace the differential drive pinion gear and the ring gear set.

Spicer Eaton call 1-800-TCM-HELP

Meritor 1-800-535-5560

The rear axle (shaft) housing cover locator holes are worn.

Replace the rear axle shaft. Refer to Rear Axle Disassemble .

The wheel hole studs are worn.

Replace the wheel hub studs. Refer to Wheel Hub Bolt Replacement .

The rear axle shaft is bent.

Replace the rear axle shaft. Refer to Rear Axle Disassemble Rear Axle Disassemble.