A shudder/vibration, or a groan/scraping noise during acceleration may be caused by a worn or damaged constant velocity joint. The common cause of constant velocity joint damage is the loss of lubricating grease and/or the presence of foreign material and contaminates in the constant velocity joint. This usually occurs as a result of a torn or damaged constant velocity joint boot.

Carefully inspect the joint boot for cuts, tears or other signs of damage that may allow the loss of the lubricating grease and/or the entry of contaminates. If the boot is torn check for contact with foreign matter or other parts in the surrounding area. If there is no damage to the joint boots, remove the wheel drive shaft from the vehicle and inspect the constant velocity joints. Rotate the constant velocity joints in a circular motion. Do not allow the constant velocity joint inner races to become disengaged from the outer race housings, or damage to the constant velocity joints will occur. The movement of the constant velocity joints should be smooth and even. If any binding or impeded motion is felt, the constant velocity joint requires replacement.