* 4L60E: A four-speed automatic transmission. This was very common in lighter-duty trucks.
* 4L80E: A four-speed automatic transmission, typically found in heavier-duty trucks or those with larger engines.
* NV3500: A five-speed manual transmission.
* NV4500: A five-speed manual transmission, often found in heavier-duty trucks.
To know for certain which transmission *your* specific truck has, you need to:
* Check the vehicle's identification number (VIN): A dealer or online VIN decoder can use this to provide the exact specifications.
* Look at the transmission itself: The transmission case usually has an identification tag.
* Check your owner's manual: This should list the transmission type.
Without knowing the specific model and engine of your truck, it's impossible to say definitively which transmission it has.
