^ I dont have any roaring or bearing noises from the rear, only noise i was getting is a thud under wot at take off or when i start losing traction.

 

Double check the pinion try to slide it in and out the diff wiggle it up down side to side for slack your issues could be several things differential, bearings on pinion shaft, ring gear and pinion. Excessively worn I am a Chrysler tech and when u see marks like that the pinion bearings are shot and deflecting but maybe your rear end was rebuilt and they reused the diff

 

Well everything seemed tight and in place. Took a buddy for a ride and he said it seemed like a trans mount.