#12DG2. Early type with long shaft, used with 1966 up mechanical cable driven speedometer housings.
(Also fits Dana 300 Jeep transfer case, except early type with screw-in speedometer housing.)
Speedometer Gear Calculator Click Here
Main Speedometer Gear Page CLICK HERE
This chart is accurate for tire size, not actual tire measurement. The actual measurement will be less.
Dodge / Jeep Speedometer Gears
Many tire makers build their tires differently, so a 35-inch tire from one company to another may vary as much as a full inch. The short shaft gears are for an electronic speedometer and the long shaft gears are for a cable driven speedometer. If it has an in-line speed sensor that will connect to the mechanical housing, it will take the long gear, otherwise, all other speed sensors will use a short shaft. (see gallery photo)