New Old Stock Three-speed Heavy Duty Transmission Countershaft Cluster Gear.  31teeth - 26teeth - 19teeth - 16teeth (2 grooves around shaft).   Measures 8 1/2" OL.     See all photos

Fitment 1954-1960  CHEVROLET  Commercial truck;     1954-1960  1/2ton thru 1ton Pickup/Truck.

Fitment  1955  GMC  1 Ton Series 250;     1955, 1956  Series 100, 150;     1958, 1959  6cylinder 100, 150.

Never Used see all photos