* 4L60-E (4-speed automatic): This was a very common automatic transmission in many GM vehicles of that era, and likely the most prevalent in the 94 Chevy van.
* TH400 (3-speed automatic): Less common by 1994, but possible, especially in heavier-duty or older configurations.
* SM465 (4-speed manual): A robust manual transmission, less common than the automatics but a possibility, particularly in work-oriented vans.
* NV4500 (5-speed manual): Less likely, but possible in some higher-GVWR configurations.
To know for *certain* which transmission was originally installed in your specific van, you need to check:
* The vehicle identification number (VIN): Decoding the VIN can reveal the original transmission code.
* The transmission itself: Look for a tag on the transmission case.
* Your owner's manual (if you have it): It should specify the transmission type.
Without knowing the specific engine and trim level of your van, it's impossible to say definitively which transmission it *should* have. The above list covers the most probable candidates.
