This problem usually occurs when the car is lowered much, or if you have a bad engine mount on the right side. Check the engine mount first. If it,s bad, replace it with a vibratech and the Escorts heatshield. You need to remove the diff cover, and remove the secure clip on the drive shaft inside. Then remove the nut that holds the driveshaft and wheelbearing. press out the driveshaft. Release the traction control arms outer mounting point, and then replace it doing it the opposite way. Check the greaselevel in the other shaft if it,s a used one. If you need a longer shaft, GGR has it. Good luck! Johnny. Sweden.