I pulled the cover off and the ring gear has 39 teeth and the pinion has 10 teeth and the ring gear is roughly 9" in diameter. On the outside of the ring gear I found:
3697702 10-39-GM 2 64 1 2-22
I don't know if that means anything but I'm hoping someone can tell me. I tried to find out the ratio by marking the yoke and drums and counting the rotations but must be doing something wrong.
