Porsche 928 Workshop Manual page 724

Manual Transmission/Gears and Shafts
35
DETERMINING SHIM THICKNESS "Y" AT GEAP SET END
Note
3. Install a shim with maximum thickness "Y" to
take up all play.
Since a circlip on the pinion shaft prevents axial
movement. gear set must be adjusted to take up
all play between gear set and circlip.
I
1. Press assembled gear set together with an
appropriate piece of pipe (e.g. VW 519).
Approx. 5 tons of pressure.
2. install new circlip in groove
Primed in Germany
Determining Shim Thickncsr "Y" 35 - 13