I was gonna change the front and rear diff oil in my rincon... Now I was just gonna put in 75-90 mobile one synthetic gear oil. Will this be ok? Or is there some stupid slip crap in the front that needs super special oils? On another note was gonna change the diffs and the transfer case oil in my fourtrax 300 same deal mobile one ok? or does it need special junk?? thanx

 

i ran the same in my rancher

 

I run 75W90 redline in mine, which has been just fine. Any GL-5 rated 80W or 75W90 would likely be fine.