If you can see through cracks or if chunks are missing, replace it with out delay. Driving your vehicle with this vibration can damage the tailhousing on the transmission. Rapido imports this Ford of Europe part because your dealer doesn't have it available separately. The XR4Ti and Scorpio driveshafts were not designed to have their Universal Joints serviced or replaced. Unless the U-Joint is actually loose, we do not recommend replacement of the driveshaft.
Calibration is a procedure performed by using a voltmeter.
More horsepower at stock boost levels without detonation. Ability to accept higher boost levels without detonation. Consistent horsepower on hot days. Cooler cylinder head temperature. It features maximum reduction in Charge Air Temperature for both XR4Ti stick shift and automatic.