* Powerglide (2-speed automatic): This was a relatively simple, and less expensive, automatic transmission. It was often found in lower-spec Impalas.
* Turbo Hydra-Matic 350 (3-speed automatic): This was a more common and robust automatic transmission for the era. It was a popular choice across various Impala trims.
* Turbo Hydra-Matic 400 (3-speed automatic): This was a heavier-duty version of the TH350, often used in higher-performance or larger-engine Impalas.
* Muncie M20, M21, or M22 (3-speed manual): These were various versions of a robust 3-speed manual transmission; the M22 being a heavy-duty option.
* Saginaw 3-speed manual: A less common, but still possible, 3-speed manual transmission. Also a heavy duty option.
To know for sure what transmission is in a *specific* 1970 Chevy Impala, you'd need to check the vehicle's documentation (build sheet if available) or look at the transmission itself. The transmission identification tag is usually located on the transmission case.
