Were hardly even bashing it. Just speed runs on the road and driving around in the grass, thats it. The diffs are shimmed but to my understanding that is for the mesh on the ring and pinion. Have not tried replacing the diff housing, but everything else is new. Engine is the stocker. I've been into rcs for 20 ears, usually i do not get stumped like this, which is why i posted. Thanks for the replys.

Oh yea, im just using automotive wheel bearing grease. I posted asking if that was ok to use, everyone said yes, i dunno.