The Borg-Warner T90 transmission was one of the most common transmissions found in 1946 to 1971 Jeeps. Because of its long production span, it is nearly legendary. The T90 was the improved progeny of the T84, of military MB & GPW fame. The T90 was the standard three-speed as found in CJ Universals, Utility Trucks & Wagons, J Series and Forward Control Trucks.
The T-14 is a 3 speed transmission with a cast iron case. I has a casting number of T14A or 1302 and a 1 1/8" 10 spline input shaft. The I6 T-14 has a 1 3/8" 6 spline output while the V6 T-14 has a 1 3/16" 10 spline output.
The T86 is very similar in appearance and build to the Jeep T90, and these gearboxes can be confused with each other on first glance. The T86 will typically be cast with "T86AA" on its case.