Porsche 911 Carrera
1984, 1985, 1986,
1987, 1988, 1989
Slide shafts with gears and forks out of differential housing, leaving 1st - 2nd gear selector rod in transmission case.
Check the number and thickness of shims (arrow) between differential housing and bearing flange. This shimmed surface controls the pinion shaft depth. If no repairs are being carried out on the differnetial bearing or the differential, the exact shim pack should be reinstalled.
Manual Transmission–Controls and Case