To determine the exact transmission your truck has, you can:
1. Check the VIN: The Vehicle Identification Number (VIN) will contain information about the transmission. You can find the VIN on your driver's side doorjamb or your registration documents. You can then use a VIN decoder online to find out the transmission type.
2. Look under the hood: The transmission is located on the right side of the engine, below the engine and behind the exhaust manifold. The transmission's identification tag will usually have the transmission's code.
3. Check your owner's manual: If you have the original owner's manual, it should list the transmission type for your specific model.
Once you've determined the transmission type, you can find more information about it online or in a repair manual.