Hello everyone:
The automatic transmission was crafted by Borg-Warner, and sold under the name "Flash-O-Matic." It is similar to the "Ford-O-Matic."
It IS a Ford-O-Matic, or rather the FOM is a Borg Warner design. Studebaker developed an auto trans in conjunction with BW. Ford later came in on the deal too. The Ford models (Ford-O-Matic, Merc-O-Matic, Cruise-O-Matic, and FMX) have a slightly different case design and a totally different valve body, but the rotating assembly is nearly identical to the BW models used in all other makes. Flash-O-Matic is just the AMC name for the BW auto, I forget what Studebaker called theirs. The same rebuild kit works for all the BW based trannys, there are different valve body gaskets in the kit for different models. Clutches, bands, and most seals are identical.