Solved!
The car has been sitting for a while....

The donor transmission shifter bracket part #1 (picture) looked a little bent (did not put this on the car), and I had not replaced the gear selector shaft #6.
Procedure:
1. Remove distributor cap+rotor (16valve eng.) 3x8mm bolts, eliminating damage ...

After replacing the m46 gearbox on my 1991 940 I noticed that the gear positions had moved to the right. The reverse lockout does not work anymore, and the L-shaped reverse lock plate can not be adjusted far enough. 3d and 4th gear are also hard to engage. I have replaced the 2 lower plastic bushing ...