Modified TREMEC T5 5-Speed Super-Duty | Rear Position Front Socket Shifter

Key Features

• 330 ft-lb torque capacity - handles up to 450 hp on street tires
• 2.95 first gear ratio for strong launch performance
• 0.63 overdrive drops cruise RPM for improved fuel economy and reduced engine wear
• World Class internals with carbon fiber synchronizer rings on gears 1-4
• 10-spline input shaft (1-1/16" diameter) and 28-spline output shaft
• Steel front bearing retainer with Cobra-style pocket bearing
• Tapered carrier bearings and main needle bearings throughout
• Ford speedometer drive with 7-tooth gear (6 and 8-tooth available)
• Rear Position Front Socket Shifter at 18.25" from main case front.
• Uses GM transmission mount (MD-604-1102, sold separately)
• 2.75 quarts ATF Dexron III fluid capacity
• Just 75 lbs dry - TREMEC's most compact transmission
• Optional 0.73 overdrive ratio available

Description

The TREMEC T5Z Super Duty solves the common problem of blown factory T5 transmissions in Fox Body Mustangs while delivering the deep 0.63 overdrive that drops highway RPMs, improves fuel economy, and reduces engine wear. This Z-spec variant represents a significant step up from the 3.35-first-gear. The 2.95 first gear with 0.63 overdrive was the motorsports-derived combination originally developed for higher torque applications.

World Class internals set this transmission apart from earlier non-World Class designs. Carbon fiber synchro rings on all forward gears deliver smooth, consistent shifts even under hard acceleration. The steel front bearing retainer and Cobra-style pocket bearing address common weak points, while tapered carrier bearings and main needle bearings provide the durability that made this platform Ford's choice for performance applications. At just 75 lbs dry, the T5Z fits where larger transmissions cannot - perfect for tight classic car engine bays.

The 330 ft-lb torque rating is conservative. Real-world testing confirms reliable operation behind 450+ horsepower small-block Fords when paired with DOT-approved street tires. The 1.25-inch forward shifter offset places the gear lever in a more natural position for most Fox Body interiors. Deep overdrive cruising reduces engine temperatures, extends component life, and makes highway driving significantly more comfortable.

Direct bolt-in replacement for any 1983-1993 V8 Mustang. Also compatible with earlier Mustangs and other small-block Ford applications when paired with the appropriate bellhousing. Requires 2.75 quarts of ATF Dexron III fluid.

Call MDL at 208-453-9800 to discuss your specific application and verify fitment details for your particular chassis.

Kit Includes

• TREMEC T5z 5-speed Super-Duty transmission with custom shift lug
• 10-splined input shaft and 28-splined output shaft
• Steel front bearing retainer
• Cobra-style pocket bearing
• Carbon fiber 3-4 synchronizer rings
• Built-in reverse light switch (left side)
• Built-in cruise control safety switch (right side)
• Ford pattern mechanical speedometer drive assembly with 7-tooth gear (6 or 8-tooth available separately)
• Fill and drain plugs
• Installation instructions
• MDL extended warranty: manufacturer warranty plus 1 additional year with 1-year grace period
• Lifetime technical support from Modern Driveline

Note: GM transmission mount MD-604-1102 required but not included. Front-shift tail housing also available separately in kit form: MD-510-1001 (forward position, requires MDL quick shifter) or MD-510-1000 (rear position, uses stock Mustang T5 shifter).