MY BAD! MY BAD! Sorry to everyone
I misread the post, the OP was talking about ATF in the gearbox. I used MTL and had the cold gummier thing. Didn't try ATF. Sorry! Dackel, if you want to strike everything I said, make it go away, except the warranty concern.
I did use Redline ATF in E36 328i 5MT and it has been good so far but E36 called for Dexron ATF so it didn't seem like a big risk.