Auto-to-Manual T5z Conversion Package | 1965-1966 Mustang | SBF 375HP

Auto-to-Manual T5z Conversion Package | 1965-1966 Mustang | SBF 375HP

Auto-to-Manual T5z Conversion Package | 1965-1966 Mustang | SBF 375HP

Description

Auto-to-Manual T5z Conversion Package | 1965-1966 Mustang | SBF 375HP

Key Features

  • TREMEC T5z Super Duty transmission with 330 lb-ft torque capacity - rated for street cars up to 450 HP on DOT-approved tires
  • Gear ratios: 2.95 / 1.94 / 1.34 / 1.00 / 0.63 with deep 0.63:1 overdrive for reduced highway RPM
  • World Class design with tapered carrier bearings, needle roller bearings under each gear, and carbon fiber synchro rings
  • 10-spline input shaft and 28-spline output shaft for Ford small block applications
  • Just 75 lbs. dry weight - the most compact TREMEC transmission available
  • Offset shifter maintains stock console shifter position in early Mustangs
  • Complete automatic-to-manual conversion with guided component selection for your specific build
  • Requires 2.75 quarts ATF Dexron III fluid

Description

Converting your '65-'66 Mustang from automatic to manual unlocks the driving experience these cars were meant to deliver. This complete T5z conversion package is engineered specifically for first-generation Mustangs running small block Ford engines up to 375 horsepower. The TREMEC T5z (Super Duty Z-spec) builds on the legendary T5 platform with upgraded internals that handle 330 lb-ft of torque - a significant step up from the 265 lb-ft rating of factory V8 World Class T5s from the '85-'93 era.

The 2.95:1 first gear and 0.63:1 overdrive combination is ideal for classic car retrofits. That deep overdrive drops highway RPM by 37% compared to direct drive, dramatically improving fuel economy while reducing engine noise and operating temperatures. The 2.95 first gear provides strong, controllable launches without the excessive multiplication of a 3.35:1 first - which means you can run steeper rear gears without burning through first gear in 20 feet. World Class internals including tapered carrier bearings, needle bearings under each main shaft gear, and carbon fiber synchro rings deliver the smooth, light shift effort the T5 is known for.

At just 75 pounds dry, the T5z is the smallest and lightest transmission in TREMEC's lineup - critical in the tight confines of a first-gen Mustang tunnel. The offset factory shifter positions the gear lever exactly where the original automatic shifter sat, maintaining your interior's authentic layout. This package walks you through selecting every component based on your engine, power level, and driving style - from bellhousing and flywheel to clutch setup and hydraulic or cable release system.

Every component has been selected specifically for 1965-1966 Mustang applications with Ford small block engines. MDL's guided package selection ensures proper fitment and compatibility across your entire drivetrain, from the crankshaft to the driveshaft yoke. If you're ever uncertain about component selection, MDL's concierge service can help match parts to your specific project and budget.

Kit Includes (Selected Components Based on Your Build)

  • TREMEC T5z Super Duty 5-speed transmission with factory shifter
  • Aluminum or steel bellhousing (application-specific options)
  • Bellhousing installation hardware kit (aluminum or steel)
  • Bellhousing block plate
  • Bellhousing clutch fork
  • Flywheel (steel, billet steel, or billet aluminum options - various balance and SFI configurations)
  • ARP flywheel bolts
  • Clutch set (multiple disc and pressure plate options)
  • Pressure plate bolts (standard or ARP)
  • Clutch pedal assembly for '65-'66 Mustang
  • Pedal pad kit (metal-backed or deluxe options)
  • Clutch pedal stop
  • Pedal bushings or bearings
  • Hydraulic master cylinder kit or cable clutch kit
  • External slave cylinder kit (if hydraulic option selected)
  • Shift knob with thread adapters as needed
  • Shift lever (Hurst or aftermarket options)
  • Shift boot and bezel
  • Speedometer cable
  • Speedometer driven gear (16-21 tooth options for proper calibration)
  • Speedometer gear retaining clip
  • Reverse light wiring harness
  • Transmission crossmember for '65-'66 Mustang
  • Transmission mount
  • ATF Dexron III transmission fluid (3 quarts)
  • Driveshaft yoke (1310, 1330, or 1350 series - 28-spline)
  • MDL lifetime technical support
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