Quote Originally Posted by SCbuick010 View Post
Also, if im just cruising, when i let of the throttle the tach jumps up about 200 rpm before dropping as it should. I dont know if thats related buts thats something ive noticed for awhile

thats normal, the same thing happens if you tap the brakes in 4 th gear, with out letting off the gas at cruising speed. it the torque converter just unlocking.