Sorry. Accidentally posted. I took it to a dyno guy who fixed a engine problem. The first time the rear wheels turned under power was on the rollers. He accelerated lightly first and set some fuel mapping. Next he tried to do a more aggressive pull. That's when something happened. It started making a grinding sound and lost connection with the wheels. I'm sure it is in gear. Jacked up, in a gear, the problem seems to be in the final drive. Turning the right wheel does not turn the left at all. It should turn backwards (no LSD).
I have read about somone having a simular problem and it was the cv shaft pulled out slightly. Does anyone have insight on how to diagnose and fix this problem?