This increases the durability of the U-joint assembly and is a worthwhile upgrade for any front-drive axle.This front-axle upgrade was handled by Conejo Off Road in Thousand Oaks, California ...

See All 10 Photos Czajkowski says the front drive axle joints, called Birfield joints, are the most common parts to break if you add a front locker; he won't leave home without spare Birfields.