it allows your driveshaft to move freely it looks like a plus sign and usually has a grease fitting if you lose your u-joint your rack and pinion or drive shaft has most likely fallen out by now.
Ball joints are in the front suspension, it is basically what the wheel assembly pivots on when you turn. Universal joints are on the ends of the drive shaft in a rear wheel drive vehicle. At the...
The "U" style and the Constant Velocity "CV" joint. The "U" style uses a cross shaped center while the "CV" uses a knuckle and ring cage connected with balls. CV's are used where there is some...