Porsche 928 Workshop Manual page 1011

39
DifferentiallTransaxle System
928
Recommended Sequence of Adjusting Drive Pinion and
Ring Gear
When it becomes necessary to adjust the drive pinion and ring gear, it would be in
the interest of economical procedures to keep to the following sequence.
1. Determine the total shim thickness "Stot" (S1 plus S2) for the specified pre-load of the
taper roller bearing/differential.
2. Determine shim thickness "S3".
3. Determine shim thickness "SS".
4. Divide total shim thickness "Stot" in SJ and S2 so that there is the specified amount of
backlash between the ring gear and drive pinion.
The goal of adjustments is to relocate the point of optimal quiet running as was determined
in the special testing machine during production.
Perfect results require absolute care and cleanliness during all assembly measuring operations.
Location of Shims
SJ = Shim for ring gear
S2 = Shim for ring gear
S3 = Shim for ring gear
SS = Shim for pinion/ring gear
39 - 218
Adjusting Drive Pinion
and Ring Gear
Printed in Germany