Porsche 928 Workshop Manual page 871

928 Differential. Transaxle System
39
a
Recommended Sequence for Adjustment of Pinion/Ring Gear
If drive pinion and ring gear have to be adjuted,the following
sequence
of procedures would be
most economical.
1. Determine total shim thickness "Sges" (Sl plus S2) for specified preload of taper roller
bcaring/diffcrential.
2. Determine shim thickness "S3".
3. Divide total shim thickness "Sges" into Sl and S2. so that specified backlash is between ring
gear and drive pinion,
Objective of adjustments must be to regain the maximum degree of quiet running, as had been
determined by the special testing machine in manufacturing.
a
Absolute cleanliness is essential for all assembly jobs and testing procedures to guarantee perfect
results.
After working on the final drive it will only be necessary to adjust the pinion and ring gear, if
parts had been replaced which have direct influence on said adjustment. The following chart
will help in avoiding unnecessary adjustmentn!
Ring Gear (S1 + S2)
Drive Pinion
tomatic) or rear
a
Printed inGermany _ 1, 1978
Adjusting Drive Pinion and Ring Gear
(Automatic Transmission)
39 _ 33