[rotorwrench]

That cluster gear was around for a long time. The 1936 up type has a different locator set up on the back for the thrust bearing than the later ones used up into the early 50s on Mercury cars and pickups. They have little flanges that stick out to keep the thrust bearing turning with the cluster gear. Both are interchangeable but a person has to have the thrust bearing to fit the cluster they have. Mac VP sometimes has good used ones but it sure wouldn't hurt to have a new one. Mac has the proper replacement snap rings too. It's a must to get his snap rings and his thrust washer set up. Also make sure that the second gear bushing is a good fit to the main shaft and that the two parts properly work together. There were several types.

Pickup transmissions were basically unchanged from 1939 though 1950. The gears changed in 1951 for all the light duty 3-speeds. By 1951, all the cars had the 259 series light duty types with the small input and the long output. Pickups kept the light duty up into 1952 but the gears were all different.