I'm changing the rearend gears and putting in the Comptech reinforced diff housing. Can anyone recommend a really good gear oil and tranny fluid to use.

Thanks

 

I use Redline MT-90 75W-90 transmission fluid and have Mobil 1 75W-90 gear oil in the differential right now. The same time that I purchased the transmission fluid I also purchased a quart of Redline's 75W-90 gear oil which I will try next when the Mobil 1 is ready for a change. I have also heard many great things about the Motul and AMSOIL products.

Here are XViper's extremely professional and helpful threads on how to change both if you haven't seen them already.

https://www.s2ki.com/forums/showthread.php?...?threadid=83577

https://www.s2ki.com/forums/showthread.php?...&threadid=99995

 

I use Redline MT-90 in the tranny and Mobil 1 75W-90 in the rear.

You should probably change the diff oil after you put a few hundred break in miles on it, then again 1K miles later, since it is so cheap to change.

 

Thanks, a lot.