Tony guessed: > > Modulator valve? Bill guesses it could be a bad vacuum supply to the modulator ... Could be someone has shimmed/adjusted it deliberately for the hard shift. The book says: Upshifts harsh. > incorect carb to trans TV rod adjustment > improper low band adj > Vac mod hose broken or disconnected > Vac mod diaphragm leaks > Vac mod stuck > Hydraulic modulator valve stuck ??? Bill