TREMEC Magnum 6-Speed Package | Mopar 5.7L/6.1L Hemi | Left-Hand Starter

TREMEC Magnum 6-Speed Package | Mopar 5.7L/6.1L Hemi | Left-Hand Starter

TREMEC Magnum 6-Speed Package | Mopar 5.7L/6.1L Hemi | Left-Hand Starter

Description

TREMEC Magnum 6-Speed Package | Mopar 5.7L/6.1L Hemi | Left-Hand Starter

Key Features

  • 700 lb-ft torque capacity - handles serious power from built Gen III Hemi engines without compromise
  • Double overdrive ratios (0.74 5th, 0.50 6th) - drop highway RPMs for improved fuel economy and reduced cruise noise
  • 135 lbs dry weight - lighter than many OEM six-speeds while delivering vastly superior strength
  • 26-spline input shaft - accommodates high-performance single and twin-disc clutch setups
  • 31-spline output shaft - matches modern driveshaft requirements for robust power transfer
  • Gen III Hemi uses LA/Magnum small block bellhousing bolt pattern - straightforward bellhousing selection for classic Mopar swaps
  • Triple-cone synchronizers on 1st-4th gears, double-cone on 5th-6th - lightning-fast, positive engagement under power
  • One-piece countershaft design - eliminates the weak splined two-piece shaft found in earlier T56 transmissions
  • Dual speedometer pickups - works with both mechanical cable and electronic speedometer systems
  • Fully customizable package - select transmission ratio, clutch assembly, hydraulic system, and accessories to match your build

Description

Swapping a modern Gen III Hemi into a classic Mopar demands a transmission that can handle the torque while delivering a refined driving experience. The TREMEC Magnum 6-speed is the aftermarket equivalent of the TR-6060 found in factory Vipers and Challengers, purpose-built to withstand 700 lb-ft of torque while providing unbelievably crisp shifts. This customizable package pairs the Magnum with a complete drivetrain solution specifically configured for 5.7L and 6.1L Hemi engines with left-hand starter configurations.

The Magnum's double overdrive ratios transform highway driving - 0.74:1 in 5th and 0.50:1 in 6th gear keep your Hemi loafing at cruise speeds while maximizing fuel efficiency. Inside, TREMEC's engineers addressed every weak point from earlier T56 designs: significantly widened gear faces with laser-beam welded engagement teeth deliver superior strength and precision, while the one-piece countershaft with thicker journals eliminates the torque-limited splined connection of previous generations. Triple-cone synchronizers on 1st through 4th gears enable high-RPM shifts with minimal effort and maximum precision.

Gen III Hemi engines share the same bellhousing bolt pattern as the classic LA and Magnum small block engines (273, 318, 340, 360), which simplifies bellhousing selection for classic Mopar swaps. This package includes a proper six-speed bellhousing to mate the Magnum to your Hemi, along with your choice of clutch assemblies, hydraulic or mechanical actuation systems, flywheel, and all supporting hardware. The 85mm centerline distance provides reasonable tunnel clearance, though some vehicles may require modifications depending on original drivetrain configuration.

MDL's guided package selection walks you through every component choice to ensure complete compatibility across the entire drivetrain - from transmission ratio selection through clutch sizing, hydraulic system configuration, speedometer solutions, and driveshaft components. Whether you're building a street cruiser or a serious performance machine, this package delivers everything needed to put modern six-speed capability behind your Gen III Hemi.

What's Included

  • TREMEC Magnum 6-speed transmission (multiple gear ratio options available)
  • Custom shifter assembly
  • Aluminum bellhousing (Mopar-pattern for Gen III Hemi)
  • Bellhousing hardware kit
  • Clutch assembly options (single or twin-disc configurations)
  • Clutch disc and pressure plate sets
  • Billet steel flywheel
  • Pressure plate bolt set
  • ARP flywheel bolt kit
  • Hydraulic master cylinder kit options (multiple bore sizes)
  • Hydraulic release bearing assembly options
  • Stainless steel hydraulic line
  • Transmission mount
  • Shift knob options (multiple styles and finishes)
  • Custom shift levers and boots (optional)
  • Speedometer adapter and gear or electronic sensor options
  • Speedometer gear clip
  • 4 quarts TREMEC-approved transmission fluid (Dexron III ATF)
  • Speedometer wiring harness
  • Reverse light wiring harness
  • Driveshaft yoke options (1310, 1330, or 1350 series; 31-spline)
  • Complete installation support and technical guidance
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