I took the m46 out of El Rojo Grande (1990 745ti w/ 4sp + OD, 190K mi). It was getting very hard to shift. The trans is sitting on my bench right now, and I am trying to decide what to do with it.

The input shaft is pretty shaky, but the gears do not appear badly worn, and it never made any noise, just the tougher and tougher shifting, which got so bad I almost got stuck in traffic last week.

I have a couple of options:

1. Have a shop bench build this trans, $400 - $1200 plus parts

2. Buy a box from a wrecker, $350, (pig in a poke?)

3. Buy a new/rebuilt trans, $???

4. Rebuild it myself, $?? (less than a new one!). I built the trans in my P1800, and have the Haynes manual, so I am not too worried about being able to do it.

What I would like from you folks out there is your thoughts on how you would deal with this problem. Which option would you choose, and why or why not? Is there an option I have missed?