* Check the VIN (Vehicle Identification Number): The VIN contains a code that specifies the transmission. You can decode this code using a VIN decoder online (many free options are available) or through a Dodge dealership. This is the most reliable method.
* Look at the Transmission Case: The transmission itself usually has a tag or casting number stamped on it. This number can then be cross-referenced with online databases or parts catalogs to determine the transmission type. You'll likely need to get underneath the truck to see this. Be aware that accessing this area may require some mechanical knowledge and potentially tools.
* Examine the Build Sheet (if available): If you're lucky, the original build sheet for your truck might still exist. This document details all the components of the vehicle, including the transmission.
* Check the Owner's Manual (if available): While not always definitive, your owner's manual might list the transmission type.
* Look at the Gear Selector: While not conclusive, the gear selector markings (e.g., PRNDL vs. PRND2L) can offer a clue, but different transmissions can have similar marking styles.
Common Transmissions for a 1998 Dodge Ram 1500 5.9L:
The most likely candidates are:
* 46RE: A four-speed automatic transmission. This was very common in this year and engine combination.
* 47RE: Another four-speed automatic, a slight upgrade from the 46RE. Less common but possible.
Important Note: Without looking at the truck directly, it's impossible to definitively say which transmission is installed. The VIN decoding is the most reliable method.
