Title: Inspect and replace the companion flange and/or pinion seal; measure the companion flange runout.
Course: Automotive Technology III (20104-III) > Section: MANUAL DRIVE TRAIN AND AXLES: Drive Axle Diagnosis and Repair-Ring and Pinion Gears and Differential Case Assembly

Procedures should include

- checking the differential yoke for runout
- checking the seal
- replacing the companion flange and seal, if necessary.

Process/Skill Questions:

- What are the procedures for replacing the companion flange?
- What tools are used to check runout?
- What failure can result from an improperly torqued pinion nut?