whole truck vibrates after 65 and i can move the drive shaft about 1/4 inch to each side near the carrier bearing, i doubt that's good. so new bearing? u-joints? help

 

Start with tire balance, and ask the shop doing it to check the driveline u-joints and carrier bearing at the same time. The carrier bearing rubber mount has some "normal" movement in it. Most vibrations are tire/wheel related. Driveline speed vibrations usually are described as rumbling, since the spin 3-4 times faster than your axles.