My Cruiser is vibrating at highway speeds and the vibration increases horribly on deceleration. At city speeds it's okay. I'm pretty sure it's the rear shaft U-joints and I'll be calling Cruiser Dan for OEM replacements. Problem is, the local driveline shop wants $80 to replace the U-joints (shaft off) which sounds rather steep to me. I really don't want to beat the U-joints out as that might warp the flanges, so does anyone have any ideas or suggestions for replacing the U-joints without damaging things?