* Check the VIN sticker: The Vehicle Identification Number (VIN) sticker, usually located on the driver's side dashboard or doorjamb, contains a code that indicates the transmission type. You'll need to consult a Ford VIN decoder (many are available online) to translate the code.
* Look for a tag on the transmission itself: The transmission usually has a tag or sticker affixed to it, providing a model number or code. This requires getting under the vehicle, and may be difficult to access depending on the Expedition's configuration.
* Check your owner's manual: If you still have the original owner's manual for your 1998 Ford Expedition, it should specify the transmission type.
* Look at the build sheet (if available): If you have the original build sheet for your vehicle, it will list the transmission.
* Consult a Ford parts website: Use your VIN on a Ford parts website. Entering your VIN often brings up a parts diagram that shows the correct transmission for your specific vehicle.
Important Considerations for a 1998 Ford Expedition: The 1998 Expedition primarily used either a 4R70W (4-speed automatic) or a 4R100 (4-speed automatic, heavier-duty version). Determining which you have is crucial for parts ordering and repair. The 4R100 was more common in heavier-duty or higher trim level Expeditions.
