I will agree with the concept that one should completely go through a trans that old.
Of course that only means when there is reason to go internal. Your symptoms sound a lot like what happens when the kick down switch fails. Try unplugging the kickdown solenoid at the right rear of the trans. The wire just unplugs. Tie it out of the way and drive the car.
If I were dealing with it I would probably want to fully diagnose the problem before it came apart as a valve body might be my next idea what would be wrong. Don't want to find that out after redoing everything.
Bosch Master, ASE Master, L1
33 years MB technician
Last edited by stevebfl; 12-26-2003 at 08:43 PM.