T56 Magnum 6-Speed Conversion Package | 1960-1976 Mopar A-Body | 5.7L HEMI

T56 Magnum 6-Speed Conversion Package | 1960-1976 Mopar A-Body | 5.7L HEMI

T56 Magnum 6-Speed Conversion Package | 1960-1976 Mopar A-Body | 5.7L HEMI

Description

Key Features

  • TREMEC T56 Magnum 6-speed transmission with 700 lb-ft torque capacity - nearly double the original T56
  • Dual overdrive ratios for reduced highway RPMs and improved fuel economy
  • Lightweight 135 lb dry weight - significantly lighter than comparable automatics
  • Two-piece laser-beam welded gear construction for precise tooth engagement and built-in positive stops
  • Triple-cone synchronizers on 1st-4th gears, double-cone on 5th, 6th, and reverse for smooth shifts
  • Bolstered one-piece countershaft with thicker journals eliminates the weak two-piece design
  • Gen III HEMI LA small block bellhousing bolt pattern compatibility
  • Complete hydraulic clutch actuation system for modern pedal feel
  • Custom A-body crossmember and transmission mount included
  • Dual speedometer pickups for mechanical or electronic applications
  • Multiple gear ratio options: 2.66 or 2.97 first gear sets available
  • MDL lifetime technical support included

Description

Transform your classic Mopar A-body from automatic to the ultimate manual driving experience with this complete 5.7L HEMI to TREMEC T56 Magnum conversion package. This turnkey solution addresses the core challenge facing Dart, Duster, Valiant, and Barracuda builders: getting modern Gen III HEMI power properly mated to a transmission that can handle the torque while delivering the double overdrive benefits that make these classics highway-friendly cruisers.

At the heart of this package lies the T56 Magnum - TREMEC's flagship aftermarket transmission that combines OEM supercar technology with aftermarket versatility. Known in its original equipment form as the TR-6060, this is the same transmission found in factory muscle cars including the Dodge Challenger, Viper, and Chevrolet Camaro. The Magnum's 700 lb-ft torque capacity comes from substantially widened gear faces and two-piece laser-beam welded speed gear construction that allows precise shaping of engagement teeth with optimized pitch and angle control. Built-in positive stops on the clutching teeth virtually eliminate over-thrown shifts during aggressive driving.

The engineering advantages run deep. TREMEC replaced the stamped keys of earlier designs with spring-loaded ball-type inserts that dramatically reduce friction and eliminate notchy shifting. The result is incredibly short, low-effort shift throws with crisp engagement. Redesigned shift forks with integrated shift keys eliminate the bending and wallowing issues that plagued earlier T56 units. The bolstered one-piece countershaft with thicker journals replaces the weaker two-piece design used in most original T56 applications, while larger support bearings handle increased thrust loads with zero deflection.

This package requires tunnel modifications for the Magnum's larger case - MDL provides a custom sheet metal tunnel extension and floor support designed to attach to your OEM A-body floor pan. The transmission uses 3.66 quarts of TREMEC HP-MTF, Dexron III ATF, or GM Synchromesh fluid. All components are selected specifically for 1960-1976 A-body 5.7L HEMI applications, from the aluminum bellhousing to the hydraulic release bearing system, crossmember, and electronic wiring harnesses.

What's Included

  • TREMEC T56 Magnum 6-speed transmission with choice of gear ratios (2.66 or 2.97 first gear)
  • Aluminum bellhousing for Gen III HEMI to T56 Magnum mounting
  • Hardware kit with grade 8 fasteners
  • Steel flywheel with 8-tooth ring gear for HEMI application
  • ARP flywheel bolts
  • Pressure plate bolts (standard or ARP available)
  • Clutch set with disc and pressure plate
  • Pilot bearing for crankshaft-to-input shaft alignment
  • Hydraulic master cylinder kit with remote reservoir
  • Hydraulic release bearing assembly (multiple options available)
  • Stainless steel braided hydraulic line
  • Choice of shift levers: Hurst or custom MDL options
  • Shift knob selection in multiple styles and colors
  • Shift boot (Hurst or universal)
  • Custom A-body crossmember for T56 Magnum
  • Transmission mount
  • Speedometer driven gear (16-21 tooth options based on rear gear ratio)
  • Four quarts TREMEC-approved transmission fluid
  • Electronic speedometer wiring harness
  • Reverse light wiring harness
  • 31-spline output yoke (1310, 1330, or 1350 U-joint options)
  • MDL lifetime technical support
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