Since I have done the 5speed conversion, I have a vibration. I had used my stock aod driveshaft. I have changed driveshafts and still have a vibration. Is the tranny mount the sames for the aod & 5speed? Is it possible that the bushings in the rear control arms are bad enough to give this vibration? If someone else who done the 5speed conversion had this problem, what did you do to get rid of the vibration? This is an everyday driver with a stock motor & 3.73 gears. Your help will be greatly appreciated.