View My Video
is this what your car does too when is in lower rpm???
Click on the link .

 

im saying sometimes a vac leak intermintant will cause the car to studder randomly. I remeber when i first got my car it would studder when i would slow down. I went thru a few shops before a tech realized the pancake valve at the rear of the engine had a crack in it. When it was under vaccum it would work fine but once i let off throttle it would studder and the car sounded like it was about to die. Sometimes it would die if i left off the throttle to quick. Cuz u replaced the oil in the tran and that helped but that might have not been your only problem.