Time Required: 30 minutes (approximately)
Skill Level: Intermediate - You should have "above average" mechanical knowledge/experience to attempt this installation.
Mustang 1979-1993 GT
Mustang 1979-1993 LX
Mustang 1994-1995 GT
Mustang 1994-1998 V6
Mustang 1996-1998 Cobra
Mustang 1996-1998 GT
Once you change the gears in your differential, you need a new speedometer gear to recalibrate your speedometer. They're inexpensive, and only take a few minutes to change. These Recalibration Gears fit 1979-1998 Mustangs. Please check our Hot New Product Section for information on 1999 and 2002 Mustangs.
Instructions: Note transmission type, model and resulting drive gear.
Cross reference with your rear-end gear ratio to find the correct "recalibration" gear for your application.
Manual Transmissions with 7 Tooth Drive Gear 1983-1989 T-5 OEM Pre 1993 T-5 Aftermarket 1996-1998 Cobra T-45 OEM All Tremec Transmissions
Manual Transmissions with 8 Tooth Drive Gear 1990-1995 T-5 OEM 1996-1998 T-45 OEM Except Cobra
Automatic Transmissions with 7 Tooth Drive Gear 1983-1989 Automatic Transmissions
Automatic Transmissions with 8 Tooth Drive Gear 1990-1998 Automatic Transmissions