To be precise, you'll need to:
1. Identify your transmission type: Check your vehicle's documentation or a sticker under the hood. Knowing if it's a 4L60E, or another less common type, will help narrow down the exact location.
2. Consult a repair manual: A repair manual specific to your 1998 Chevrolet Tahoe will have diagrams showing the exact location of the sensor. This is the most reliable way to find it. Many online resources sell downloadable manuals.
3. Look near the speedometer cable (if applicable): While not always directly on the sensor, the speedometer cable is often routed near the transmission speed sensor area.
Important Note: Accessing the sensor usually requires getting under the vehicle. Be sure to support the vehicle properly on jack stands before attempting any work underneath.
