* TH350 (3-speed automatic): Very common in lighter duty trucks.
* TH400 (3-speed automatic): A heavier-duty automatic, often found in trucks with larger engines or heavier payloads.
* 700R4 (4-speed automatic): An overdrive automatic, becoming more common in '88 models.
* SM465 (4-speed manual): A popular manual transmission choice.
* NV3500 (5-speed manual): Also a possibility, though perhaps less common than the SM465 in '88.
To know for sure which transmission is in *your* specific 1988 Chevy truck, you need to check:
* The VIN (Vehicle Identification Number): This will contain codes that identify the transmission. A VIN decoder website or your local Chevy dealer can help decipher this.
* The truck's build sheet (if you have it): This will list all the options and components, including the transmission.
* Look under the truck: You can physically identify the transmission by its case markings. However, this requires some familiarity with transmissions and might be difficult without prior experience.
Without more specifics about the truck (engine size, trim level, etc.), it's impossible to say definitively which transmission it has.
