Yo dude. My understanding is that the case is pressed together with the shafts and the bearings. By cracking the case, you *must* more or less install new bearings. Bearings are press fit into the case, not a home job. Once the case is cracked, everything else becomes fair game - stuff like syncros, forks, shafts/gears if worn, etc.
Locally, I know Dan Patzer will rebuild trannies. Bet there are others...try the CCA Puget Sound board for ideas on people to ping... ??
Jeff
Bellevue WA
90 535iM - not much stock remains. 3.7 liters, ported head, cammed, 3.73 diffy, M5 brakes, MAFed, yadda yadda yadda
86 Porsche 951 - Track Toy