* NV4500: This is a 5-speed manual transmission.
* 47RE/48RE: These are 4-speed automatic transmissions. The difference between the 47RE and 48RE is relatively minor and often depends on specific options and build date.
To know for certain which transmission is in *your* truck, you need to:
* Check the sticker on the driver's side doorjamb: This sticker lists the vehicle's options, and the transmission type should be listed.
* Look at the transmission itself: You can see the transmission from underneath the vehicle. The identification number is usually cast or stamped onto the transmission case.
* Check your owner's manual: If you still have it, the manual will specify the transmission type.
* Check your vehicle's registration or title: Sometimes, the transmission type might be listed.
Without looking at your specific truck's documentation or the transmission itself, it's impossible to say definitively.
