the motor mounts were good, i checked those myself while the engine was out. I'm not following the part about shifting heavy weight, got the down stream part though. Never mind I get it now... Could bad transmission mounts cause this to get the drivetrain out of alignment when under a load (stopping and going) and causing my problems? Haven't really tinkered with 4x4's, have the basic concept, just not all the ins and outs.