some of the bmw 5spd trannies take atf fluid.
Originally Posted by Billwill
This is possible but I have seen reports of some owners filling their manual transmissions with ATF fluid and claiming it gives them smoother changes.
I stick to the recommended gearbox oil...75W-80 I believe.
I know a lot about cars. I can look at a car's headlights and tell you exactly which way it's coming