A constant velocity joint is encased by a rubber boot and is shaped like a 3 leaf clover. A universal joint is exposed and just in the shape of a plus sign. Universal joints can be serviced on the vehicle and CV joints have to be removed to be serviced.
Thanks spez. I guess the 01 Pathy LE 4WD has both?. There's something slightly rumbling under the driver's side front end. Not loud, just rumbling over bumps. No grinding that I can tell. Think it's a CV or UV joint??
sounds like a worn out upper or lower ball joint or maybe a loose or busted shock. Jack the truck up and see if you can move anything by hand or stick a large prybar under the wheel and pry against the ground and try to pick the wheel up. See if anything appears loose.