[Chris]

I have an AX15, what is the best fluid to run in it. I have heard Auto trans fluid and gear oil what would you run?

 

[darkproximity]

I run redline mt90, spendy but worth it..

I wouldn't run atf.. it can slowly break down the synchronizers.. Just swapped a newly rebuilt transmission in a week or so ago, because my old one had bad synchros.. Don't wanna go through that again