The manual transmission of the E36 takes automatic transmission fluid, not gear oil.I'm beginning to feel some "notchy-ness" in my 1st and second gear, so I'm going to replace the fluid next week. I've heard of people using Royal Purple and saying it is a bad choice, so I'm looking to use the tried-and-true Redline fluids.
Here is my question. Some people recommend the MT-90 (along with pelicanparts.com) while I read a lot of places that say the 75W90 GL-5 Gear Oil is correct. The Redline application guide recommends D4 ATF and doesn't even list the MT-90! :facepalm:
What have you guys had success with?
Edit: 2004 E46 325CI coupe M54 5-speed manual
You should do some more homework before you put in 75w90. If the manual of the E46 is the same as that of the E36, then the oil you are thinking of is way too heavy. That's W-A-Y too heavy.