I'm getting a slight whine, but nothing major, from the gearbox. I'm running 80/90 gear oil. I was wondering if there is an additive (Duralube?) etc. that I could add as a temporary fix? I've heard of Redline gear oil but I know for some Getrag boxes(not TR3) there tends to be leaks as the fluid is so thin. Anybody used Redline as their gearbox oil or can recommend an additive for the 80/90?
Karl
Karl