What fluid for a 4-speed trans?

Hope that the OP's head hasn't exploded by now. Some people just can't loose. Use what ever you want to use, it will be fine, but not with some people. For me, time to hit the UNWATCH THREAD BUTTON.
No one is trying to win anything, just contribute the best way we know how. You followed the golden rule, which is to go to the factory service manual. I lent my knowledge and experience from 32 years in the lubes business to update your contribution. I'm sorry if you felt otherwise. It's all good my friend.