Well rebuilding the Auto Trans GC works -- sort of. After about 30 miles or so of driving car drops from 3rd to 2nd and won't shift back up. Let it sit for about an hour or so and you are good to go for about the same amount of time. ( sounds like heat failure of transistor TIP42 that I replaced the RCA Transistors with ) Also shifting from 1st to second gets flaky if driving continues. Any other advice on this is welcome. At this point I am going to pull out the TIP42s and put back the RCA Transistors to see what happens. BTW the TIP42s can be replaced with NTE197s as well. ( the NTEs seem to have a larger voltage range but I am not sure that matters since I don't really know the full aspects of the circuits involved. ) Matthew L. Walker Vin 1219 Seriously looking at redesigning that circuit board.