* 3-speed automatic (Torqueflite 727): This was a very common transmission for this era of truck.
* 4-speed manual: Also a likely option, depending on the trim level and engine.
* 5-speed manual: Less common, but possible depending on options.
To know for sure what transmission is in *your* specific 1990 Dodge D150, you'll need to check:
* The vehicle's identification number (VIN): A decoding service (often available online) can provide detailed specifications including the transmission type.
* The build sheet (if available): This will definitively state the transmission.
* The transmission itself: Look for markings on the transmission case. This is usually the most reliable method, although you might need to get under the truck for a good look.
Without additional information, it's impossible to say definitively which transmission your truck has.
