Originally Posted by GoHerd
My Jetta didn't do it. Dealer also was puzzled.
BIG weight difference. Heavier vehicles will tend to form a water sheet with re-freezing directly under the tires. The pressure differential alone can create this effect. Plus, with a heavier vehicle you have more rearward pressure on the slope as well.
This really looks like a combination of:
1) front wheels free to turn
2) parking pawl is locking the transmission, and thus the rear driveline
3) rear differential is open. Look at the exterior video--one rear wheel tries to go FORWARD as well as sliding. This is exactly how an open diff with a locked driveline will behave when the other wheel tries to move in the reverse direction.
The parking pawl seems to be working.