Little off subject,but I just replaced the fluid in my 4 spd car.Belive I had regular 90wt gear oil in it. The factory service manual says to use ATF. For the 833 a GL-4 oil is also needed for the soft (brass) syncros. GL-4 is becoming very hard to find. Ended up going with Red-Line MT-90 GL-4 transmission fluid,and boy am I glad I did. Feels like a brand new trans. Smooth shifting,no grinding, awsomeness !!!!
So, I am a firm believer in Red-Line oil. Look into it.
