Strange Vibration upon acceleration, sometimes
I recently put heavy duty rear leaf springs on my 01 xj, it lifted the rear way more than I thought and I had major driveshaft vibration. I added the shims and installed a transfer case lowering kit and it smoothed everything out. However, lately I have noticed when accelerating hard and steady, that there is a vibration/knocking under the center of the car, and I can feel it in my feet. It doesnt feel like the old vibration, or an exhaust rub, would this be a U joint, or is this a little vibration left over from the drive shaft?