When casually driving around 50mph, any attempt to slowly accelerate results in massive shaking. Say I want to increase my speed from 50mph to 55mph the entire car just shakes, I don't know how to describe it any other way, but it's bad. The shaking actually occurs when accelerating at any speed, but its the worst around 50mph. The only time when it doesnt seem to do it is when the TQ Converter is locked up at just over 60mph. Highway travel is fine, but it shakes so bad in city driving that it gives me a headache. Ive had the transmission replaced twice already and the shaking began roughly 20k miles after the second replacement. It wasnt bad at first but its gotten really bad now. Has anyone else experienced this?