.....It only does it when driving and only at highway speeds. 60-75mph.
Oscillation is def coming from the floor and trans tunnel. Trans and engine both have brand new mounts. It is def mounted tight, but I need to retorque since remounting the crossmember and driving 100 miles or so now.
Brake drums and shoes are brand new. Back right does rub a bit on the backing plate, but is wearing down now and the vibration was there when the old original bell shaped drums were on anyways.
The pinion angle looks okay to me... but 4 degrees would be hard for me to see with my eyes.....