sorry to reply to an old post but i came across this post looking for something else. my 3650 was also notchy, but i found the problem pretty quick. i just bought my car in march and i changed every fluid in the car. the trans had over 5 quarts of fluid in it which is WAY to much. i drained it...
just joined the forums today. i bought this car in march, its an 01 cobra pretty much stock. garage kept and clean as a whistle. has 48k original miles and is in pristine condition. its mineral grey with parchment interior. 1 of only 55 in that color combination according to what ive looked up...