This new internal speedometer gear fits 4 speed toploader transmissions.
Made from high temperature nylon plastic. 1 3/8"diameter.
Typically, the 7 tooth is used in Mustang transmissions using 2.70 - 3.50 rear axle ratios, the 6 tooth is used with 3.50 - 4.30 gears, but you should check your application.





