You should be proud of yourself. You just updated that 1969 Firebird from a leaking, old 326 and Powerglide to an LS3 and a fully-electronic 4L60E four-speed overdrive automatic. The Firebird now ...

Speedometer-gear calibration and selection should be an integral part of any changes to your Mustang's chassis or driveline. Changes to wheel and tire size alter the speedometer reading because the ...

We don't have to tell you that late-model overdrive transmissions have become a prototypical upgrade for any kind of performance car. The number and variety of these transmissions makes that decision ...