Question: Can you run regular gear and axle oil with a limited-slip? You could answer "No" and be correct—or you could say, "Yes, but you'll need to add Yukon Gear & Axle friction modifiers." Clutch-type limited-slips can be as chatty as a room full of lawyers, and just as dangerous. When added to gear oil, this modifier helps the clutches and improves differential noise while extending life. Limited-slips have a lot of moving parts; keep them in shape with Yukon Gear & Axle friction modifiers.