What did I buy.
I just bought a 1998 Mustang GT Convertible. Auto Trans. 125000 miles. The precious owner said the car had a chip install from a precious owner. He also said the speedometer reads high. I'm traveling down the road at what the speedometer say's at 80MPH @2900 RPM's. This is on a 65 MPH highway. People are passing me up like I'm standing still. I coming to the realization the rear end gears have be changed. I know the trans is going through all the gears. What is the factory gear ratio for this car? Any help would be greatful. Thanks Jerry