OK, I'm going to look for something Electrical and hope my problem was is easy as yours was......
I just got back from a tranny shop. Guy put a scanner on it and it showed a P0732 and P0734(?): Incorrect 2nd gear Ration and 4th gear ration.
He said it needed rebuilt = $1900.
What do I need; new spark plug cables? Sensors? anything else.

I hope it's something electrical........but, not to be pessimistic.......wouldn't it have been more intermittant since the last rebuild if it was electrical?
Sure appreciate everyone's input - gotta love the web.