Just bought a 1986 4runner 22re 5 spd manual trans, drives and runs great, except in reverse. In reverse it clunks real bad? In 4wd rolling back with clutch engaged and disengaged. Clunks in 2wd in reverse with clutch engaged and does not clunk when clutch disengaged? Any ideas. I'm hoping for the front right axle (cv)? I've been working on vehicles for a long time and this reverse only noise is new to me.