Thx. Finally got a ride in the vehicle. Belongs to a young friend I'm trying to help. As you suggested I had him start out in low and hit the throttle good and accelerated fine then into second with nice solid shift and no slippage, same into 3rd with a nice long hill started getting an engine twitch and oil pressure drop 5psi with each twitch but would not accelerate past 70 mph, just hold its own, did not notice a passing gear, about that time we got quite a vibration so as slowing test ride was interrupted by a blow out on the right rear. Any clues so far? Thx Merrill