* Automatic Transmission: The drain plug is typically on the bottom of the transmission pan. You'll need to get under the Jeep to see it. The transmission pan is usually located near the center of the vehicle, towards the rear.
* Manual Transmission: The drain plug is located on the side of the transmission case, usually on the lower portion. Again, you'll need to get under the Jeep for access. Its exact location can vary slightly depending on the specific transmission model.
In either case, consult a repair manual specific to your 1998 Jeep Wrangler's transmission type (AX-15 manual or AW4 automatic are common). This manual will have diagrams and precise instructions, vital to avoid damaging your transmission. A picture of your specific transmission might also help you locate the drain plug if you're unsure.
