AMC Model 20 4.88 Ratio For Use On 3.07 Up Carrier;Machined On Precision Gleason Machines;High Quality 8620 Forgings;Heat Treated;3 Year Warranty JEEP CJ5 CJ7 SCRAMBLER BASE 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 2.5L (151) 2.5L (150) 3.8L (232) 4.2L (258) 5L (304) GAS Alloy USA Alloy USA AMC Model 20 4.88 Ratio Ring and Pinion - AMC488 AMC488 Ring and Pinions