TREMEC T56 Magnum 6-Speed Conversion Package | 1970-1974 Mopar E-Body Small Block

TREMEC T56 Magnum 6-Speed Conversion Package | 1970-1974 Mopar E-Body Small Block

TREMEC T56 Magnum 6-Speed Conversion Package | 1970-1974 Mopar E-Body Small Block

Description

Key Features

  • TREMEC T56 Magnum 6-speed with 700 lb-ft torque capacity and double overdrive design
  • Choice of close-ratio (2.66 first) or wide-ratio (2.97 first) gear sets with 0.80/0.63 overdrive
  • 26-spline input shaft with triple-cone synchronizers on gears 1-4 for crisp, precise shifts
  • Complete auto-to-manual conversion with bellhousing, hydraulic clutch system, and all mounting hardware
  • Configurable clutch options including single and double-disc assemblies with 10.5-inch diameter
  • SFI 6.1 certified QuickTime steel bellhousing with spun cone construction for dimensional accuracy [VERIFY: Confirm MD-401-8074 bellhousing compatibility with T56 Magnum - some sources indicate RM-8074 is not compatible with Magnum/TR-6060]
  • Includes speedometer and reverse light wiring harnesses for complete integration
  • Fits 1970-1974 Plymouth Barracuda and Dodge Challenger with small block (318/340/360) engines

Description

Factory automatics in '70-'74 E-Body Mopars were never designed to handle the power levels modern engine builds produce, and decades of use have left many of them unreliable at best. This comprehensive TREMEC T56 Magnum conversion package delivers everything needed to swap your Barracuda or Challenger from automatic to a modern double-overdrive 6-speed manual, transforming both performance and driving engagement in one complete solution.

The T56 Magnum sits at the heart of this package - the same architecture found in factory Dodge Challengers, Vipers, and Chevrolet Camaros, purpose-built for the aftermarket with 700 lb-ft torque capacity. Wider gear faces, a one-piece countershaft, and two-piece laser-welded gears give it nearly double the strength of the original T56. Triple-cone synchronizers on first through fourth gears deliver the smooth, high-rpm shift capability these transmissions are known for. Choose between close-ratio gearing (2.66 first) for tighter rpm drops between shifts, or wide-ratio (2.97 first) for stronger launches and broader gear splits - both configurations include 0.80 fifth and 0.63 sixth gear overdrives that make highway cruising comfortable without sacrificing low-end grunt.

The package includes a QuickTime steel bellhousing that mates the small block Mopar bolt pattern to the transmission, a complete hydraulic clutch system with master cylinder and release bearing, and your choice of single or double-disc clutch assemblies rated for the Magnum's torque capacity. Lightweight steel flywheel, ARP fasteners, transmission crossmember, slip yoke options, and wiring harnesses for speedometer and reverse lights round out the kit. Multiple shifter configurations and shift knob options let you tailor the cockpit to your preferences.

Every component is selected to work together as a system, eliminating the guesswork of piecing together a conversion from multiple sources. MDL backs each package with lifetime technical support to ensure your swap goes smoothly from mockup to first drive.

Kit Includes

  • TREMEC T56 Magnum 6-speed transmission (choice of close-ratio TUET11009, wide-ratio TUET11012, or hybrid-ratio TUET16885)
  • QuickTime steel bellhousing for Mopar small block to T56 Magnum [VERIFY: Confirm MD-401-8074 compatibility]
  • Hardware kit with all transmission-to-bellhousing mounting bolts
  • Lightened billet steel flywheel with 130-tooth ring gear
  • ARP flywheel bolts
  • Pressure plate bolts (standard or ARP)
  • Clutch assembly - choice of 10.5-inch single or double-disc configurations with 26-spline hub
  • Hydraulic master cylinder kit with reservoir and mounting hardware
  • Hydraulic release bearing
  • Stainless steel hydraulic line with -4AN fittings (30-inch length)
  • Shift lever - choice of Hurst or custom configurations
  • Shift knob - multiple material and color options
  • Shift boot (Hurst applications)
  • Speedometer driven gear (16-21 tooth options for proper calibration)
  • Four quarts TREMEC-specified transmission fluid
  • Transmission crossmember
  • Speedometer signal harness
  • Reverse light wiring harness
  • Slip yoke - choice of 1310, 1330, or 1350 series with 31-spline
  • Complete installation instructions
  • MDL lifetime technical support
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