Tranny shifts out and into gear while maintaning speed.What may cuase this? on 2000 Oldsmobile Alero

My tranny shifts fine in all gears and when thorttle down it goes fine but when i am at a cruze speed the tranny slide in and out of gear but if i put gas to it she will go into gear and go. doesnt jerk into or out of gear the only way i know is by the rpm. If i go a distance it will stop it for awhile then drag car down and then smell tranny fluid burnen. I have changed speed sensor, and nuetral safty switch sensor.

by in Saint Paul, MN on January 04, 2013
1 answer
ANSWER by on January 04, 2013
poss torque converter lockup solenoid. scan trans control module for codes and post or get a free diag from aamco the shop pricing