Eaton Posi Unit Ford Car/Truck: 1981 ~ Pres 10 Bolt-- 31 Spline Code: 5E88F31 Price: $505.00 Quantity in Basket: none Ford Car/Truck:1979 ~ Pres 10 Bolt-- 28 Spline Code: 5E88F28 Price: $505.00 Quantity in Basket: none GM 4-Series Truck:1961 ~ 1980 12 Bolt-4 series-- 30 Spline Code: 5E12T304 Price: $470.00 Quantity in Basket: none GM Truck:1961 ~ 1980 12 Bolt-3 series-- 30 Spline Code: 5E12T303 Price: $470.00 Quantity in Basket: none GM 4-Series Car: 1964 ~ 1971 12 Bolt-4 series-- 30 Spline Code: 5E12304 Price: $470.00 Quantity in Basket: none GM 3-Series Car: 1964 ~ 1971 12 Bolt-3 series-- 30 Spline Code: 5E12303 Price: $470.00 Quantity in Basket: none 12 Bolt Car (4 series) - Aftermarket side gears-- 33 Spline Code: 5E12334 Price: $550.00 Quantity in Basket: none 12 Bolt Car (3 Series) - Aftermarket side gears-- 33 Spline Code: 5E12333 Price: $550.00 Quantity in Basket: none GM Car/Truck: 1989 ~ Pres 10 Bolt-- 30 Spline Code: 5E108530 Price: $505.00 Quantity in Basket: none GM Car: 1971~ 1988,GM Truck: 1981 ~ 1988 10 Bolt-- 28 Spline Code: 5E108528 Price: $505.00 Quantity in Basket: none