I have a question for anyone who might know.
I have had my powerglide transmission rebuilt by my transmission guy, which is familiar with all the stuff.
The puzzling question is after installation you put it in gear and you give it some gas and it rolls forward just about a half an inch or so as you rev it then all the sudden it goes in in gear then you switch gears and it stays in the gear you were just in and then jumps into the gear you selected a few seconds later.
The Transmission was a Factory 1965 Chevelle 283 combo.
It has been rebuilt using all BTE parts including trans brake.
Any help on this I would greatly appreciate. Thanks!