T56 Magnum 6-Speed Conversion Package | 1955-1957 Chevy | LS Engine

T56 Magnum 6-Speed Conversion Package | 1955-1957 Chevy | LS Engine

T56 Magnum 6-Speed Conversion Package | 1955-1957 Chevy | LS Engine

Description

Key Features

  • 700 lb-ft torque capacity - nearly double the original T56 rating
  • Double overdrive gearing with 0.74 and 0.50 sixth gear ratios available
  • 26-spline input shaft with 31-spline output across all configurations
  • Triple-cone synchronizers on gears 1-4; double-cone on 5th, 6th, and reverse
  • One-piece countershaft with widened gear faces for maximum strength
  • Multiple gear ratio configurations: close ratio (2.66 first) and wide ratio (2.97 first)
  • Dual speedometer pickups support mechanical or electronic speedometers
  • Guided package configurator ensures component compatibility across your entire build
  • 3.66 quart fluid capacity - uses Dexron III ATF or GM Synchromesh

Description

Drop modern supercar drivetrain technology into your Tri-Five Chevy with this comprehensive TREMEC T56 Magnum conversion package for LS-powered 1955-1957 Chevrolet Bel Air, 210, 150, and Nomad applications. The Magnum combines the best of TREMEC's TR-6060 OEM engineering with the popular features of their TKO 5-speed, delivering unbelievably crisp shifts while handling a massive 700 lb-ft of torque - perfect for high-output LS builds pushing serious power.

Inside, the Magnum represents a ground-up redesign over the original T56. Forged gears feature laser-beam welded engagement tooth plates for precise pitch and angle control, with positive stops preventing over-travel on hard shifts. The one-piece countershaft with thicker journals and widened gear faces replaces the torque-limited two-piece design of earlier transmissions. Enhanced main case webbing and split ring retainers (replacing traditional snap rings) provide greater thrust load capacity while maintaining tighter tolerances throughout.

Tunnel modifications are typically required for Tri-Five installations - most builders raise the tunnel approximately 3/4-inch to 2 inches depending on engine positioning and drivetrain angle. The existing firewall can generally be used without modification. This customizable package system lets you select every component for your specific build: transmission configuration, bellhousing, clutch system, hydraulic setup, shifters, and all supporting hardware. Our guided selection process ensures compatibility across all components.

MDL's concierge service provides expert guidance to optimize your drivetrain combination for your project goals and budget. Whether you're building a weekend cruiser or a serious pro-touring machine, this package delivers the flexibility to spec exactly what you need.

What's Included

  • TREMEC T56 Magnum transmission - choice of close ratio (2.66/1.78/1.30/1.00/0.80/0.63) or wide ratio configurations with 0.74/0.50 or 0.80/0.63 overdrive options
  • Bellhousing selection - hydraulic and mechanical release options available
  • Transmission-to-bellhousing hardware kit
  • Flywheel selection for LS engines
  • Flywheel bolt set
  • Clutch system - single and dual disc options
  • Hydraulic master cylinder kit
  • Hydraulic release bearing
  • Hydraulic line assembly
  • Transmission mount
  • Shifter selection - MDL custom or Hurst options
  • Shift boot and bezel
  • Speedometer components - cable adapter, driven gear, sensor, and retaining clip options
  • Pedal pads and trim rings
  • Transmission fluid - 4 quarts ATF
  • Speedometer wiring harness
  • Reverse light wiring harness
  • Driveshaft yoke - multiple U-joint series available (1310, 1330, 1350)
  • MDL lifetime technical support
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