[Mac VP]

Ford (and later on Borg Warner) never made or offered any alternate gears for those transmissions. The only gears ever made for that gearbox were the same from 1932-52 when they stopped making the unit for the trucks. And, as you already know, these units were always non-synchro. You must always double clutch when shifting.

This transmission would be brutish overkill for the passenger cars. They were offered as an optional transmission for the pickup trucks but most of those were ordered for farm service and other heavy duty applications. With the generally good supply of the 3 speed transmissions (which were synchronized into 2nd and high gears) it would not make much sense to try to shoehorn the 4 speed unit into a passenger car.