T5z 5-Speed Conversion Package | 1967-1968 Mustang & Cougar | Small Block Ford

T5z 5-Speed Conversion Package | 1967-1968 Mustang & Cougar | Small Block Ford

T5z 5-Speed Conversion Package | 1967-1968 Mustang & Cougar | Small Block Ford

Description

Key Features

  • Complete manual-to-T5z conversion engineered specifically for 1967-1968 Mustang and Cougar small block Ford applications
  • Uses existing 6-bolt bellhousing with adapter plate - no bellhousing replacement or modifications required
  • Custom offset shifter positions gear lever in factory location for correct ergonomics
  • Retains original clutch linkage, fork, and mechanical release components
  • TREMEC Super Duty T5z handles 330 ft-lb torque - suitable for street builds up to 450 hp on DOT-approved tires
  • Ultra-lightweight 75 lbs dry weight fits where larger transmissions cannot
  • Deep 0.63:1 overdrive lowers highway RPM for improved fuel economy and reduced cabin noise
  • Gear ratios: 2.95 / 1.94 / 1.34 / 1.00 / 0.63 with 2.76 reverse
  • 10-spline input shaft, 28-spline output shaft

Description

Transform your 1967-1968 Mustang or Cougar from a 3-speed or 4-speed manual to a modern 5-speed overdrive with this comprehensive T5z conversion package. The TREMEC Super Duty T5 (Z-spec) handles 330 ft-lb of torque and is well-suited for street builds up to 450 horsepower on DOT-approved tires. At just 75 lbs dry, this is the smallest and lightest transmission in the TREMEC lineup - perfect for the tight confines of first-generation Mustang engine bays where space is at a premium.

This package preserves your car's original character while adding modern drivability. The adapter plate mounts directly behind your existing 6-bolt bellhousing, eliminating the need for bellhousing replacement or clutch system modifications. Your original clutch linkage, fork, and related mechanical release components remain in service. The custom offset shifter positions the gear lever in the factory location, maintaining proper ergonomics and interior aesthetics so the conversion looks and feels factory-correct.

The Super Duty T5z is built with a 2.95:1 first gear and deep 0.63:1 overdrive - a significant improvement over the 3.35/0.68 gear set found in stock Mustang World Class T5s. This ratio spread delivers strong acceleration off the line while the deep fifth gear lowers highway cruising RPM for improved fuel economy, reduced engine temperatures, and a much quieter in-car experience. World Class features include tapered roller bearings on main and counter-shafts, needle bearings under 1st through 4th gears, carbon fiber synchro rings, and a Cobra-style pocket bearing with steel input bearing retainer.

The T5z requires 2.75 quarts of ATF Dexron III and includes a mechanical speedometer output with a 7-tooth drive gear (6 or 8-tooth optional). This package includes everything needed for a complete conversion in your small block Ford-powered 1967-1968 Mustang or Cougar. MDL's guided package selection walks you through component options, and our team is available to help you make the right part selection for your project and budget.

Kit Includes

  • TREMEC T5z Super Duty 5-speed transmission with factory TREMEC shifter
  • Custom offset shifter assembly - positions lever in OEM location
  • Bellhousing-to-transmission adapter plate
  • Hardware kit - aluminum or steel mounting options available
  • ARP flywheel bolt set
  • Clutch set options - multiple configurations available
  • Pressure plate bolt set options - standard or ARP
  • Shift knob and ball selection
  • Shift lever options for custom ergonomics
  • Shift boot and bezel selection
  • Mechanical speedometer cable and driven gear options
  • Speedometer gear retaining clip
  • Custom crossmember for 1967-1968 applications
  • Transmission mount
  • Three quarts ATF transmission fluid
  • Slip yoke options - 28-spline, multiple U-joint series available
  • MDL lifetime technical support
Subtotal 0.00 0 selected
Final step

Review your build

Make sure everything looks right. Click Edit on any row to change a choice.

Package total 0.00