TREMEC Magnum 6-Speed Conversion Package | Mopar Big Block | Auto to Manual

TREMEC Magnum 6-Speed Conversion Package | Mopar Big Block | Auto to Manual

TREMEC Magnum 6-Speed Conversion Package | Mopar Big Block | Auto to Manual

Description

TREMEC Magnum 6-Speed Conversion Package | Mopar Big Block | Auto to Manual

Key Features

  • 700 lb-ft torque capacity - handles serious big block Mopar power with confidence
  • Double overdrive configuration (0.80 fifth, 0.63 sixth) reduces highway RPMs for improved cruising and fuel efficiency
  • Choice of close ratio (2.66 first) or wide ratio (2.97 first) gear sets to match your driving style and rear axle ratio
  • 26-spline input shaft and 31-spline output shaft for maximum strength and driveshaft compatibility
  • Triple cone synchronizers on gears 1-4, double cone on 5-6 for smooth, precise shifts even at high RPM
  • Complete package includes bellhousing, flywheel, clutch, hydraulic components, and all supporting hardware
  • Fits 383, 400, 426 Hemi, and 440 big block engines
  • Multiple shifter positions and speedometer pickup options for installation flexibility
  • Tunnel modifications required - sheet metal tunnel extension available
  • Approximately 140 lbs dry weight

Description

Ditch the slushbox and put a real transmission behind your Mopar big block. This complete TREMEC Magnum conversion package delivers everything you need to swap your automatic for a modern six-speed manual that can handle the torque your 383, 400, 426 Hemi, or 440 produces. The Magnum is the aftermarket version of the TR-6060 found in factory performance cars like the Dodge Challenger, Viper, and Chevrolet Camaro - proven architecture built from 100% brand-new OEM-quality components.

The Magnum's 700 lb-ft torque capacity comes from serious engineering upgrades over the original T56: wider gear faces, two-piece laser-beam welded gear construction for precise tooth geometry, a one-piece countershaft, and a beefed-up input shaft designed to handle twin-disc clutch setups. The result is a transmission that shifts smoothly at high RPM while standing up to repeated abuse. Spring-loaded ball-type synchronizer inserts replace the old strut design, eliminating notchy engagement and delivering short, precise throws.

The double overdrive configuration gives you real-world usability - fifth gear at 0.80 works as a usable power gear while sixth at 0.63 drops engine speed for relaxed highway cruising. Choose close ratio (2.66 first) if you're running shorter rear gears or want tighter spacing for track work, or wide ratio (2.97 first) for more aggressive first-gear acceleration and a broader overall spread. Either way, you're getting a transmission engineered to match modern performance expectations while fitting behind classic Mopar muscle.

Because the Magnum's case is larger than a factory Mopar transmission, tunnel modifications are required for proper clearance. MDL offers a sheet metal tunnel extension that attaches to the OEM floor pan without cutting away structural metal. The guided package selector walks you through every component decision - from flywheel size (matched to your specific engine) to hydraulic release bearing configuration to shift lever style. Our team can also provide concierge service to ensure every part matches your build requirements and budget.

What's Included

Select One Component from Each Category:

  • TREMEC Magnum Transmission: Choice of close ratio (2.66 first) or wide ratio (2.97 first) gear sets with multiple overdrive configurations
  • Bellhousing: Steel bellhousing for Mopar big block to TREMEC Magnum/T56 fitment
  • Hardware Kit: Transmission-to-bellhousing mounting fasteners
  • Flywheel Assembly: Application-specific flywheel for 383/400, 426 Hemi, or 440 engines (130-tooth)
  • Flywheel Bolts: High-strength crankshaft bolts (standard or ARP)
  • Pressure Plate Bolts: Clutch-to-flywheel mounting bolts (standard or ARP)
  • Clutch Set: 26-spline clutch disc and pressure plate assembly
  • Pilot Bearing: Input shaft pilot bearing
  • Hydraulic Master Cylinder Kit: Complete master cylinder assembly
  • Hydraulic Clutch Release Bearing: Hydraulic throwout bearing assembly
  • Hydraulic Release Bearing: Internal slave cylinder options
  • Hydraulic Line: 30-inch braided stainless clutch line
  • Shift Knob: Choice of standard, MDL-branded, or custom shift knobs in multiple colors and finishes
  • Shift Lever: Hurst or custom shift lever options
  • Shift Boot: Hurst transmission tunnel boot options
  • Speedometer Gear: Driven gear in 16-21 tooth counts for accurate speedometer calibration
  • Transmission Fluid: 4 quarts of TREMEC-recommended ATF
  • Transmission Mount: Polyurethane transmission mount
  • Wiring Harnesses: Electronic speedometer and reverse light harness options
  • Driveshaft Yoke: 31-spline slip yoke in 1310, 1330, or 1350 U-joint series
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Final step

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