#12DG2. Long Shaft Dodge Speedometer Gear.
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.)
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 speedometers. Will also fit varying transfer case types, such as the Dana 300 (later version).
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)
Long Shaft Dodge Speedometer Gear