This product is ideal for enthusiasts of classic Ford vehicles who are upgrading their rear axle or seeking to maintain compatibility with older models that use this 3.89 ratio differential ring and pinion design.
The original review's description was: "Motive Gear F890389 Differential Ring and Pinion 3.89 Ratio for Ford 9" Compatible with Bronco (1966-1986), F-150 (1975-1986), Mustang (1965-1973), More"
