A8L V8-4.2L (BFM) (2004)
Pinion Gear: Service and Repair
Shim Position
Pinion and Ring Gear, Adjusting
‹› The pinon and the ring gear must be adjusted exactly for the service life and quiet running of the final drive. For this reason, the pinions and ring
gears are paired during the manufacturing process and are checked for wear and noise. Moving the pinion by the axle adjusts the quiet running
because the torsional backlash is moved within the specified tolerance.
‹› The difference r, in reference to the master gauge Ro, is written on the outer circumference of the ring gear.
‹› Replace the drive train (pinion and ring gear) together only.
Shim Position
S1 - Shim for Ring Gear Inside the Final Drive Cover
S2 - Shim for the Ring Gear Inside the Rear Axle Housing
S3 - Shim for the Pinion Inside the Rear Axle Housing