TREMEC T56 Magnum 6-Speed Package | Chevy Small Block and Big Block

TREMEC T56 Magnum 6-Speed Package | Chevy Small Block and Big Block

TREMEC T56 Magnum 6-Speed Package | Chevy Small Block and Big Block

Description

TREMEC T56 Magnum 6-Speed Package | Chevy Small Block and Big Block

Key Features

  • 700 lb-ft torque capacity - handles serious power from built small blocks and big blocks
  • Double overdrive ratios reduce cruising RPM and improve fuel efficiency
  • 135 lbs dry weight - significantly lighter than comparable 6-speed transmissions
  • 26-spline input shaft and 31-spline output shaft
  • Triple-cone synchronizers on gears 1-4, double-cone on 5th, 6th, and reverse for smooth, high-RPM shifts
  • One-piece countershaft with thicker journals eliminates the torque-limiting splined connections of earlier T56 designs
  • Laser-beam welded gear plates with positive stops prevent over-travel on hard shifts
  • Multiple gear ratio options: close ratio (2.66 first) or wide ratio (2.97 first)
  • Dual speedometer pickups - compatible with mechanical or electronic speedometers
  • 4616 chromoly gears and shafts throughout
  • Fully reversible TKO-style shifter with built-in mid-shift provisions
  • Customizable component selection - choose the clutch, flywheel, hydraulics, and accessories for your specific build

Description

Classic Chevy builds pushing serious horsepower need a transmission that can take the punishment while delivering a modern driving experience. The TREMEC T56 Magnum solves that problem - it is the aftermarket's premier 6-speed manual, derived from the TR-6060 found in factory supercars like the Dodge Viper, Challenger, and Chevrolet Camaro. With 700 lb-ft of torque capacity, double overdrive ratios, and incredibly short, low-effort shift throws, the Magnum delivers strength where it counts and refinement where you want it.

The Magnum represents a ground-up redesign from the original T56, addressing every known weak point. The face widths of all gears have been significantly increased, and each gear features forged construction with laser-beam welded plates containing the engagement teeth. This two-piece design allows much more precise shaping of the engagement teeth with better pitch and angle control, plus the placement of positive stops to prevent over-travel of the slider on hard shifts. TREMEC replaced stamped keys with spring-loaded ball-type inserts to reduce friction and prevent notchy shifting - the result is very short, smooth shifts even under heavy load.

Earlier T56 designs used a two-piece countershaft that was torque limited because of the splines connecting the two sections. The Magnum eliminates this weakness with a much stronger one-piece shaft featuring thicker journals and widened gear faces. The new shift forks have permanently mounted shift links - eliminating contact with the rail bore for precision shifting and reduction of fork wear - plus enhanced cross sections for better rigidity and zero deflection. Split ring designs replace traditional snap rings, offering greater thrust load capacities and tighter tolerances throughout.

This customizable package allows you to build a complete drivetrain conversion for your Chevy small block or big block application. Select from multiple TREMEC Magnum gear ratio options, then choose your bellhousing, clutch kit, flywheel, hydraulic release system, shifter, and supporting components based on your vehicle, power level, and budget. Tunnel modifications are typically required depending on the specific vehicle. MDL's concierge service is available to help you select the right parts for your project - contact us at any point during the selection process.

What's Included

This is a customizable package - select the components that match your application and budget:

  • TREMEC T56 Magnum 6-speed transmission (close ratio, wide ratio, or hybrid ratio options available)
  • Six-speed bellhousing for Chevy small block/big block bolt pattern
  • Chevy installation hardware kit
  • Clutch kit (hydraulic actuation options from multiple manufacturers)
  • Pressure plate bolts (standard or ARP)
  • Flywheel (multiple options for small block 168-tooth and big block applications)
  • ARP flywheel bolts
  • Hydraulic master cylinder kit
  • Hydraulic release bearing
  • Hydraulic line
  • Transmission mount
  • Shift lever (Hurst or custom options)
  • Shift knob
  • Shift boot
  • Speedometer cable adapter
  • Speedometer driven gear
  • Speedometer gear clip
  • Electronic speedometer sensor (if needed)
  • Speedometer harness
  • Reverse light harness
  • Driveshaft yoke (1310, 1330, or 1350 series options)
  • Transmission fluid (4 quarts Dexron III ATF)
  • MDL technical support and concierge service
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