A833 Rebuild

Get a Factory Service Manual ASAP. It will be very hard to rebuild the trans without one, in all honesty, especially if you have little or no experience.

There are many tricks and tips covered in the FSM which help a lot. Use a piece of 3/4" copper tubing with the ends smoothed (no burrs) as a dummy shaft inside the cluster gear to hold the needle bearings, washers and spacer in place. As mentioend above, the cluster gear needs to sit at the bottom of the case to allow room for the main shaft to enter the main case. The FSM has some good diagrams of how the rebuild process works.