Ford 8in. 31 Spline Pro Series Limited Slip For Use With 31 Spline After Market Axles;For Use With All Ratios;Aggressively Preloaded Cone Style Clutch System;Smooth Street Operation; Hardened Spider Gears;4 Year Replacement Warranty FORD RANCHERO 500 500 XL BASE CUSTOM GT SQUIRE 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 2.4L (144) 2.8L 3.3L (200) 4.1L (250) 4.3L (260) 4.7L (289) 5.8L (351) Windsor 5L (302) 6.4L Big Block FE (390) 6.6L (400) 7.5L (460) 7L Big Block FE Super CJ (428) 7L Big Block FE ThunderBird (428) 7L Cobra Jet (429) 7L Super Cobra Jet (429) 7L Thunder Jet (429) GAS Auburn Gear Auburn Gear Ford 8 Inch 31 Spline Pro Series Limited Slip - 5420115 5420115 Differentials