Stelcom66
Minister of Fire
The Powerglide was 2 speeds. I think the Turbo Hydramatic was 3. I had a Powerglide in my 1967 Chevy Caprice. I managed to break it though - or maybe the previous owner. It started slipping really had. I had a used replacement installed by Aamco in '75 for just $100. Drove the car for a few more years. Watched it turn over to 00000 miles. (100k). That was kind of a big deal back then.