How do i tell if my u-joints need replacing on my 2007 dodge 2500 diesel?

Answer 1

Generally, I just lift one wheel enough to clear the ground then I put the vehicle in neutral and have someone turn the wheel while I watch and listen to the U Joint. If I hear ANY squeaking or grinding I replace the U Joint. Next I put it back in park then have someone move the wheel again. Now it will hit against the parking gear so the helper moves the wheel back and forth while you "touch" the area between the driveshaft and the yolk. If there is ANY play, I replace the U Joint.

Some of the longer driveshafts have been divided into two parts and have a center "carrier bearing". Often the carrier bearing will make noise, hum, grind, squeek... If that's the case, replace it.