Determination Of Shims S1 And S2 - Porsche 928 Workshop Manual

928 Differential/Transaxle System
39
DETERMINATION OF SHIMS S, AND Sz
Measured backlash must be brought to value Determining Shim
specified by manufacturer of pinion/ring Thickness S,
gear by splitting total shim thickness Sges. (Opposite Ring Gear)
Backlash required is stamped on ring gear.
S2 = Sges -S,
Adjusted backlash value could be less by
0.05 mm, but must never be greater than the
stamped value. Example:
Sges
S,
0.95 mm
- 0.27 mm
0.68 mm
Determining Shim
Thickness S,
(Ring Gear End)
Note:
S1
= Sges (total shim thickness)
- measured backlash
+ backlash inscribed on ring gear
Example:
Sges
- measured backlash
+ inscribed backlash
(by way of example)
S,
0.95 mm
0.88 mm
0.07 mm
0.20 mm
0.27 mm
On the basis of experience with these
pinions/ring gears the shims S2 (opposite
ring gear) can be selected approx. 10 to 15 %
thinner in favor of shims S, (ring gear end).
1. Remove side transmission cover and split
total shim thickness Sges, that it gives
the determined shim thicknesses S, and
s*
Note:
When tightening nuts for side transmission
covers, always remember that there is a
certain amount of backlash.
Never let the drive pinion and ring gear
clamp.
Printed in Germany
VIII, 1984 Adjusting Drive Pinion and Ring Gear
39 - 135