short story version...tore my driveshaft out of my car at the track. Torque Arm was damages as well. Replaced driveshaft and torque arm with new ones and now when I drive the car I hear a "thumpthumpthump" coming from under my car. It gets worse as I go faster and practically goes away when I mash on the clutch....could something have been damaged in the transmission tail shaft from the driveshaft? Maybe something inside the differential??? Trying to find where to start without tearing the car into a million pieces.

 

First things first id check the trans mount and motor mounts and if
you went back to a stock torque arm check the torque arm bushing and bolts to make sure they are torqued to factory specs