Ford Racing 5-Speed Extra HD Tremec Transmission with a 0.68 5th Gear Ratio.If your Mustang is making some serious power and the factory transmission just isn't going to cut it, It's time to upgrade with Ford Racing's 5-Speed Extra HD Tremec Transmission to handle your Mustang's high-performance needs! This transmission is an upgraded version of the older HD Tremec 5-speed manual transmission used in the 1995 Cobra R with a 5.8L 351 Windsor engine.
The all new Extra HD Tremec Transmission features improved cast iron shift forks, a one-piece counter-shaft, gears made of 4615 steel which helps increase torque capacity up to 600 lbs./ft. for high horsepower Mustangs. It uses a close gear ratio from 1st through 4th with a 0.68 5th gear ratio and is equipped with a 26 spline input shaft and a 31 spline output shaft. The case is constructed from strong OE quality aluminum for lasting durability.
- First Gear: 2.87
- Second Gear: 1.90
- Third Gear: 1.34
- Fourth Gear: 1.00
- Fifth Gear: 0.68
For all applications, this Ford Racing 5-Speed Extra HD Tremec Transmission requires the use of a unique 10.5" clutch disc (M-7550-T302) designed for a 26 spline input shaft, and the use of a 31 spline driveshaft yoke, M-4841-A is recommended from Ford Racing.
A Ford Racing bellhousing (M-6392-R58) is required to install the 5-Speed Extra HD Tremec Transmission in a 1979-1995 Mustang. For installation in all 1979-1993 Mustangs, Ford Racing's adjustable crossmember (M-5059-A) must be used, 1979-1981 Mustangs will require some modifications. For installation in all 1994-1995 Mustangs, modifying the crossmember, lengthening the driveshaft by .625" and the use of clutch fork (E6ZZ-7515-A) is required.
Ford Racing's 5-Speed Extra HD Tremec Transmission can be used in 4.6L Mustangs when equipped with Ford Racing's bellhousing (M-6392-M46) and 11" clutch kit (M-7560-T46).
Please Note: Tremec recommends using Synchromesh fluid.
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