1996 Ford Thunderbird Owner's Manual - Page 71

Trip Odometer If you want to track your mileage up to 999.9 miles (kilometers), use the trip odometer. Simply set the trip odometer to zero by pressing the reset button firmly when beginning the distance you wish to measure. Since the trip odometer displays distance independent of the odometer it will not always advance to the next mile (kilometer) at the same time as the odometer. Tachometer The tachometer The tachometer displays the approximate engine revolutions per minute (rpm), or how fast the engine is running. You can drive your vehicle at most rpm points on the tachometer but you must stay out of the red zone. Regardless of the type of transmission in your vehicle, if you drive with the tachometer pointer in the red zone, you may damage the engine. 68