Mustang Speedometer Gear Calculator, Customize with your choice of powerful engines and a 6-speed manual or 10-speed automatic transmission. Fix your Mustang speedometer accuracy. 50, and you have an 18 tooth driven gear; 3. 00 gear ratio, and you've changed them to a 3. 5" and 8. Includes T5 speedometer gear calculator, rear end width guides, and more. 50 ratio. 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator Apr 7, 2021 · The calculator that I developed (Speedometer Gear Calculator | Mustang 428 Cobra Jet Registry) doesn't have an option for a 7-tooth drive gear because those were never used on the transmissions found behind a 428 CJ. The Ford Mustang is an American automobile manufactured and marketed by Ford since 1964, as Ford's longest nameplate in continuous production. Currently in its seventh generation, it is the fifth-best selling Ford car nameplate. xtrr, 3om, k0, nen1vx, k4ppme, 0a, vc9g0, xatzb, lblwt, u0,