4 speed yes- - - - -Dual (actually "controlled") coupling, NO! The proper name is "Dual Range" which indicates there is a 1-3 speed selector position which locks the trans out of 4th. gear until the RPM gets extremely high. There is no "torque converter"- - - - -it's a fluid coupling which does not multiply torque. The coupling is two pieces, with the forward part also serving as the engine flywheel. It also has the starter ring gear. There is a BIG O ring that seals the fluid when the coupling is bolted together. Since the back of the coupling is held onto the input shaft by a big hex nut, it's necessary to split the coupling to remove the transmission from the engine. One final bit of trivia- - - -the original fluid for those transmissions was "Type A-Suffix A", which contained a small percentage of whale oil. No longer available, obviously. The current substitute is Dexron, I believe.
If you want to get something more than scrap value for the transmission, contact FATSCO Transmission Parts
www.fatsco.net . They sell rebuilding kits, parts, and possibly complete vintage transmissions. They're located somewhere in Noo Joisey- - - -which means I'll never actually visit their business!
Jerry
