My 40 Chevy/302 GMC/T5/Ford 9" has developed a high frequency vibration around 60 mph, 3000 rpm in 4th and 2000 rpm in 5th. The driveshaft has been balanced, the angles are equal and the rear end play has been checked by professionals but the vibration is still present. The rear motor mounts are under the bell housing and two front mounts are on each side of the engine and all are in good shape.
Has anyone had vibration problems coming from the T5 trans? May be a bearing? This is a high frequency vibration that shakes the shifter as well as the clutch and brake peddles.
