FWIW... Whenever I need to research something about transmissions or differentials, I usually check with these two YouTube channels. Both of these guys have been in the game for a long time.
https://www.youtube.com/channel/UCWalB5XElyLyQ7zjW9LF-xg
https://www.youtube.com/user/GearWorldTV/videos
Ray
https://www.youtube.com/channel/UCWalB5XElyLyQ7zjW9LF-xg
https://www.youtube.com/user/GearWorldTV/videos
Ray