T56 Magnum Conversion Package | 1971-1973 Mustang & Cougar | Small Block Ford

T56 Magnum Conversion Package | 1971-1973 Mustang & Cougar | Small Block Ford

T56 Magnum Conversion Package | 1971-1973 Mustang & Cougar | Small Block Ford

Description

T56 Magnum Conversion Package | 1971-1973 Mustang & Cougar | Small Block Ford

Key Features

  • 700 lb-ft torque capacity - nearly double the original T56 rating
  • Double overdrive 6-speed with 0.50 sixth gear for reduced highway RPMs and improved fuel economy
  • Choice of gear ratios: 2.66 first gear (close ratio) or 2.97 first gear (wide ratio)
  • 26-spline input shaft and 31-spline output shaft
  • Triple-cone synchronizers on gears 1-4; double-cone on 5th, 6th, and reverse for smooth, precise shifts
  • One-piece countershaft with thicker journals and widened gear faces
  • Forged gears with laser-beam welded engagement plates and positive stops to prevent slider over-travel
  • 135 lbs dry weight - competitive strength-to-weight ratio
  • Complete customizable package includes transmission, bellhousing, clutch system, hydraulics, crossmember, and all supporting hardware
  • Guided package builder walks you through component selection for your specific application

Description

Converting your '71-'73 Mustang or Cougar from automatic to a modern 6-speed manual transforms both the driving experience and performance potential. This comprehensive TREMEC T56 Magnum conversion package delivers everything needed to swap your small block Ford-equipped car to a transmission capable of handling 700 lb-ft of torque while providing crisp, precise shifts and double overdrive gearing. The Magnum's 0.50 sixth gear ratio dramatically reduces highway RPMs, improving fuel economy and extending cruising range without sacrificing acceleration when you need it.

TREMEC engineered the Magnum based on the TR-6060 architecture found in factory muscle cars like the Dodge Challenger, Viper, and Chevrolet Camaro. The transmission features significantly widened gear face widths compared to the original T56, with forged gears using two-piece laser-beam welded construction that allows more precise tooth shaping with better pitch and angle control. Positive stops on each gear prevent slider over-travel during aggressive shifts. The one-piece countershaft with thicker journals and larger bearings resists distortion under heavy loads, while split ring retainers replace traditional snap rings for greater thrust load capacity and tighter tolerances. Updated shift forks with permanently mounted steel links eliminate the aluminum wear issues of earlier designs, providing zero deflection for precision shifting throughout the transmission's lifespan.

The spring-loaded ball-type insert design reduces friction and eliminates the notchy shifting common in earlier T56 units, resulting in incredibly short, low-effort shift throws. You'll choose between the close-ratio gear set (2.66 first) for high-performance street and road racing applications, or the wide-ratio set (2.97 first) for heavier vehicles or those running lower rear gear ratios. Due to the Magnum's larger case dimensions compared to original equipment transmissions, tunnel modifications are required for '71-'73 Mustang and Cougar installations. We offer a sheet metal tunnel extension designed to attach to your OEM floor pan.

This guided package system lets you customize every component to match your engine specs, performance goals, and budget. Select from multiple flywheel options, clutch kits rated for your power level, hydraulic or cable clutch actuation, shift levers and knobs, speedometer solutions, crossmember configurations, and driveshaft yokes. TREMEC recommends Dexron III ATF for optimal synchronizer performance, and the Magnum requires approximately 3.45 quarts of fluid. Compatible with 1971, 1972, and 1973 Ford Mustang and Mercury Cougar models equipped with small block Ford V8 engines. At any point during your build, MDL's team is available to provide concierge service and help you select the right components for your project.

What's Included

  • TREMEC T56 Magnum 6-speed transmission (choice of 2.66 or 2.97 first gear ratio)
  • Small block Ford bellhousing with clutch fork
  • Bellhousing-to-transmission hardware kit
  • Flywheel (multiple steel and aluminum options available)
  • ARP flywheel bolts
  • Clutch kit (multiple torque capacity options available)
  • Pressure plate bolts
  • Clutch pedal assembly for '71-'73 Mustang/Cougar
  • Pedal support bracket
  • Pedal pad kit
  • Hydraulic master cylinder kit or clutch cable kit
  • Hydraulic release bearing (with hydraulic option)
  • Hydraulic line
  • Shift lever (Hurst or custom options available)
  • Shift knob (multiple styles and colors)
  • Shift boot
  • Speedometer cable or electronic speedometer sensor with harness
  • Speedometer driven gear and clip
  • Reverse lockout controller and harness options
  • Reverse light switch harness
  • Transmission crossmember for '71-'73 Mustang/Cougar T56
  • Transmission mount
  • Drive shaft yoke (1310, 1330, or 1350 series available)
  • 4 quarts transmission fluid
  • MDL lifetime technical support
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