Semi Floating Axle, GM 1980 to present 2500, 3500, Trucks, Vans, Suburban and more. Must check to confirm Semi Floating Axle, Ring gear bulge on drivers side of center. Holds 5 quarts
Full Floating Axle GM 1973 to present 2500 & 3500. Must check to confirm Full Floating Axle, Ring gear bugle on passenger side of Center, 6 Liter Gas 2500 HD- Holds 6 quarts