I don't know if this is common knowledge or not... I recently had to change the U-Joints in my '06 Suburban. They put like a nylon type of injection in the yoke and driveshaft ends to hold the U-Joints in. I beat on them until my impact socket was mushrooming, very frustrating. I figured I would just go after it with fire at that point. I grabbed a simple plumbing torch, using MAP gas and heated those suckers up, the nylon literally cam right out of the injection holes like a snake after expanding. Made things a boatload easier.