Okay, from what I've looked up, for a 1992 AOD car with 3.73 gears, you need the white 23 tooth gear. However, my buddy says you need the red one, which one do you really need? Also, is it a real biotch to change the speedogear on the AODs?
There is also a little c-clip that holds the gear on. A small screwdrive will slide it out of the gear, then it will pop back in place when you have the new one on and in the right spot.