* Three-speed automatic (THM200-4R): This was a popular choice.
* Four-speed manual (SM465): Less common, generally found with larger engines.
* Three-speed manual: Also possible, though less frequent than the others.
To know for sure which transmission is in a *specific* 1983 El Camino, you'd need to check the vehicle's documentation (owner's manual, build sheet if available) or look at the transmission itself (though identifying the specific model requires some knowledge of transmission identification).
