T5z 5-Speed Conversion Package | 1965-1966 Mustang | SBF 5-Bolt Bellhousing

T5z 5-Speed Conversion Package | 1965-1966 Mustang | SBF 5-Bolt Bellhousing

T5z 5-Speed Conversion Package | 1965-1966 Mustang | SBF 5-Bolt Bellhousing

Description

Key Features

  • 330 lb-ft torque capacity with deep 0.63:1 overdrive for reduced highway RPMs
  • Gear ratios: 2.95 / 1.94 / 1.34 / 1.00 / 0.63 - strong 2.95:1 first gear for confident launches
  • Compact 75 lb. dry weight fits where larger transmissions cannot
  • Retains stock 5-bolt bellhousing - preserves clutch fork, linkage, and related components
  • Adapter plate design for bolt-in installation behind stock bellhousing
  • Custom offset shifter positions correctly in factory Mustang shifter hole
  • 10-spline input shaft, 28-spline output shaft
  • Modular package system - choose flywheel, clutch, hydraulics, and shifter components to match your build
  • Suitable for street cars up to 450 hp on DOT-approved tires

Description

Ditch the sluggish automatic or worn-out 3-speed and transform your 1965-1966 Mustang into a true driver's car with this complete TREMEC T5z conversion package. Designed specifically for small block Ford applications using your existing 5-bolt bellhousing, this package delivers modern overdrive performance while keeping conversion costs reasonable and preserving your stock clutch linkage geometry.

The TREMEC T5z is the smallest and lightest transmission in the TREMEC lineup, weighing just 75 lbs. dry - yet it safely handles 330 lb-ft of torque and supports street cars up to 450 hp on DOT-approved tires. The deep 0.63:1 overdrive drops highway RPMs dramatically, improving fuel economy and reducing engine temperatures for a quieter, more comfortable cruising experience. The 2.95:1 first gear provides strong take-off performance without the excessive gearing found in earlier T5 variants.

Installation leverages your stock 5-bolt bellhousing with the addition of an adapter plate, which means your existing clutch fork, boot, and mechanical linkage components stay in place. MDL's custom offset shifter positions correctly in the factory Mustang shifter hole, maintaining original ergonomics without cutting or modification. The modular package approach lets you configure the conversion based on your specific requirements - choose from multiple flywheel options (cast steel, lightened steel, aluminum, or SFI-approved), clutch packages from McLeod and Centerforce, and hydraulic actuation systems to match your build and budget.

The TREMEC T5z is built from 100% brand-new OEM-quality components with improved synchronizers, needle bearings under the 1st, 2nd, and 3rd-speed gears, and carbon fiber-lined 3-4 blocker rings for smooth, precise shifts at any RPM. This is the ideal transmission for classic Mustang retrofits where space is limited and driving enjoyment is the priority.

What's Included

  • TREMEC T5z 5-speed transmission (MD-552-0251)
  • Bellhousing block plate (MD-401-1108)
  • Bellhousing fork boot/cover (MD-C6OZ-7513-C)
  • Bellhousing clutch fork (MD-C6AZ-7562-A)
  • Transmission adapter plate (MD-401-2101)
  • Hardware kit - Ford small block aluminum or steel options available
  • Flywheel - cast steel, lightened steel, aluminum, or SFI-approved options
  • ARP flywheel bolt kit (MD-403-1001ARP)
  • Clutch set - McLeod or Centerforce packages available
  • Pressure plate bolt kit - standard or ARP hardware options
  • Hydraulic master cylinder kit - pedal-mount, bulkhead-mount, or compact configurations
  • External hydraulic slave cylinder (MD-910-1111)
  • 1965-1966 Mustang clutch pedal (MD-402-6566M-C)
  • Adjustable clutch pedal stop (MD-402-1000)
  • Pedal pad kit - Mustang or Bronco style options
  • Shift knob and lever selections
  • Shift boot and bezel options - chrome or black available
  • Speedometer cable (MD-506-1020)
  • Speedometer driven gear - 16 to 21 tooth options for rear axle ratio calibration
  • Speedometer gear retaining clip (MD-506-1029)
  • 3 quarts ATF transmission fluid
  • Installation instructions and lifetime technical support
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