I'm sticking with the one in the Model A. In 1950 they were introduced in a steel case. They were very popular and were an option on the 6 cylinder Chevrolet's. Back then they were marketed as the powerglide and no numbers just the name. In 1960 the aluminum body powerglides were built keeping the name and no numbers. Shortly after that the 3 speed series came out and being there was now a few models available the Th350 and TH400 were named. I don't know if chevy has given a powerglide a number specification short enough to be used as a name? As far as I know the answer to your question is no. If you were to start calling it by a number I don't think anyone would have a clue to what your were talking about. Good question and if I'm wrong I sure would like to know.