RE: When should I change the oil in my diffs?
it all depends on your diffs, some will hold oil better than others. some peole change then after every race, others every couple of races. I ran my Hyper for 4 months with nothing in them ! ofna dosent believe in putting much inside when they sell it to ya lol
get used to the feel of them turning by hand just after you fill them. then you can compare after every run.