Rislone Gear Repair is a treatment additive formulated for automotive, heavy-duty, agricultural, marine, and industrial gear oils. It is designed to mix seamlessly with synthetic and conventional GL-4, GL-5, MT-1 gear oil grades, including 75W-90, 80W-90, 75W-140, 85W-140, and others. These additives stop & seal oil leaks and reduce noise. Gear Repair renews worn oil and restores older & high mileage / kilometre gear performance. Works and safe to use on differential axles (limited slip, posi, open, electric), gears (hypoid, spider, worm, rack), transfer case (AWD, 4WD, gear oil, ATF), manual standard transmission (gear oil, engine oil, ATF), hubs, marine and much more. Helps with small leaks (if you need to add oil 1x per month), medium leaks (If you need to add oil 1x per week), and other oil related problems.