Fits Ford 9-inch rear axles with 28-spline axle shafts only (31-spline version is M-4204-F31A)
This Ford Performance Trac-Lok (Traction-Lok) limited slip differential is for the Ford 9-inch rear end with 28-spline axles; add 4 oz of friction modifier CM-19546-A1 at initial fill.
Ford Performance 9" Trac-Lok Limited Slip Differential - M-4204-F28A
