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This Chart is at 55 mph at 1 to 1 Final Drive!

This will not work for overdrive transmissions!

measurements are from flange to flange

• 1957-59 Ford = 57 1/4"
• 60-64 Ford = 59 1/2"
• 57-59 Ranchero & SW = 57 1/4"
• 1964-71 Full sized cars = 61"
• 1979-81 Lincoln Versailles = 58 1/2"
• 1972-79 Ford intermediate & Full Size = 63"
• 70-79 Ranchero - Torino = 63"
• 73-86 Pickup = 65"
• 57-72 half-ton pickup = 61 1/4"
• 73-86 half-ton pickup = 65 1/4"
• 66-77 Bronco = 58"
• 1977-86 Ford F-150, Bronco = 65 1/4"
• 1977-86 Ford E-150 = 69 1/4"
• 77-81 Granada - Versailles = 58 1/2" Comes in Disk Brake also 
• 67-70 Mustang - Cougar - Fairlane - Comet = 59 1/4"* (very popular)
• 70-73 Mustang family = 61 1/4"*

* Denotes  gray area involving some of the earlier part being found on 70 Model year cars. Note: After 1970 all axles were the 31 spline style big axles. For 28 spline units the last 4 inchs were machined down for the 28 spline ends. If you shorten the axles more than 4 inches they are enough to make 31 spline.