GT & SOHC
My car is a 2003 GT. The TR3650 broke, so I replaced it with a T56 Magnum about a year ago. The t56 has the following gearing: 1st 2.97, 2nd 2.10, 3rd 1.46, 4th 1.00, 5th .74, & 6th .50.
Recently, the car has started to vibrate a lot at 40+mph. When the car is in 4th gear at 40 mph, a vibration...