The Powerglide was Chevrolet’s main automatic transmission from 1950 through the mid-1970s, A mechanically sound transmission, it was used in various General Motors cars. The transmission underwent little change, major exceptions being a switch from iron to aluminum casting and the addition of manual first and second gears. In 1962, the aluminum models were only used with the 327-cubic-inch engine; by 1963, all Powerglides were aluminum-cast. Identifying a Powerglide is a matter of locating the source code on the transmission block and decoding it to find the Powerglide’s year of manufacture.
Identifying a Powerglide Transmission
Identify early cast-iron Powerglides by locating the word “Powerglide,” stamped on the passenger side of the transmission. Another identification feature is that the cast-iron models have no pan on the bottom of the transmission.