The differential drive pinion to the ring rear backlash is excessive.

Adjust the differential drive pinion to the ring backlash.

Spicer Eaton call 1-800-TCM-HELP

Meritor call 1-800-535-5560

The differential drive pinion and ring gear are worn.

Replace the differential drive pinion and the ring set.

Spicer Eaton call 1-800-TCM-HELP

Meritor call 1-800-535-5560

The differential drive pinion bearings are worn.

Replace the bearings.

Spicer Eaton call 1-800-TCM-HELP

Meritor call 1-800-535-5560

The differential drive pinion bearings are loose.

Adjust the bearings.

Spicer Eaton call 1-800-TCM-HELP

Meritor call 1-800-535-5560

The differential drive pinion end play is excessive.

Adjust the differential drive pinion end play.

Spicer Eaton call 1-800-TCM-HELP

Meritor call 1-800-535-5560

The differential bearings are worn.

Replace the differential bearings.

Spicer Eaton call 1-800-TCM-HELP

Meritor call 1-800-535-5560

The differential bearings are loose.

Adjust the bearings.

Spicer Eaton call 1-800-TCM-HELP

Meritor call 1-800-535-5560

The rear axle lubricant is low.

Fill with synthetic rear axle lubricant. Refer to Fluid and Lubricant Recommendations Fluid and Lubricant Recommendations.

Spicer Eaton call 1-800-TCM-HELP

Meritor call 1-800-535-5560

The rear axle lubricant is incorrect.

Replace the rear axle lubricant with the proper synthetic lubricant. Refer to Lubricant Change Lubricant Change.

The rear axle housing is bent.

Replace the rear axle housing. Refer to Rear Axle Housing Replacement Axle Housing Replacement .