TREMEC Magnum 6-Speed Conversion Package | 1968-1972 Chevelle | SB/BB Chevy

TREMEC Magnum 6-Speed Conversion Package | 1968-1972 Chevelle | SB/BB Chevy

TREMEC Magnum 6-Speed Conversion Package | 1968-1972 Chevelle | SB/BB Chevy

Description

Key Features

  • 700 lb-ft torque capacity - handles serious power from small block or big block Chevy engines
  • Double overdrive 6-speed with gear ratio options: 2.66 close ratio or 2.97 wide ratio first gear
  • 135 lbs dry weight - lighter than many 6-speed alternatives
  • Triple-cone synchronizers on gears 1-4, double-cone on 5th, 6th, and reverse for smooth, high-rpm shifts
  • 26-spline input shaft and 31-spline output shaft
  • Fully reversible TKO-style die-cast aluminum shifter with built-in mid-shift conversion provisions
  • Complete configurable package - transmission, bellhousing, clutch system, hydraulics, and all supporting components
  • Guided package builder customizes component selection for your specific engine combination

Description

Transform your 1968-1972 Chevelle with TREMEC's flagship Magnum double-overdrive 6-speed transmission. This complete conversion package replaces your original 3 or 4-speed with a modern 6-speed that withstands a massive 700 lb-ft of torque while delivering unbelievably crisp shifts. The Magnum's incredibly short, extremely low-effort shift throws with precise engagement transform the driving experience, making every gear change feel like you're behind the wheel of a modern supercar.

Known in its original equipment form as the TR-6060, the Magnum is the aftermarket version of the same transmission found in factory muscle cars like the Dodge Challenger, Viper, and Chevrolet Camaro. Significantly widened gear face widths and two-piece laser-beam welded construction enable precise shaping of engagement teeth with better pitch and angle control. The much-stronger one-piece countershaft with thicker journals eliminates the torque limitations of earlier two-piece T56 designs. Spring-loaded ball-type inserts reduce friction and prevent notchy shifting, resulting in smooth, confident gear changes even under hard acceleration.

Due to the Magnum's larger case size, tunnel modifications are required for '68-'72 Chevelle installations. MDL offers a sheet metal tunnel extension that attaches directly to the OEM floor pan. Every package is customized for your specific small block or big block Chevy engine combination through our guided selection process. Choose your gear ratios, flywheel, clutch kit, hydraulic components, and driveline pieces - all matched to work together seamlessly.

At any point during configuration, contact our technical team for concierge service to ensure proper component selection for your project and budget. Professional installation recommended due to tunnel modification requirements.

What's Included

  • TREMEC T56 Magnum 6-speed transmission (multiple gear ratio options available)
  • Six-speed bellhousing for Chevy SB/BB applications
  • Hardware kit (aluminum or steel options)
  • Flywheel matched to your engine combination (steel or aluminum options)
  • ARP flywheel bolts
  • Clutch kit with hydraulic release bearing compatibility (multiple torque ratings available)
  • Pilot bearing
  • Pressure plate bolts (standard or ARP)
  • Hydraulic clutch pedal assembly
  • Pedal pad kit (dual brake or manual brake configuration)
  • Hydraulic master cylinder kit (polished, black, or chrome finish)
  • Hydraulic release bearing
  • Hydraulic clutch line
  • Shift knob options (Hurst or custom)
  • Shift lever (Hurst or custom styles)
  • Shift boot
  • Speedometer cable adapter
  • Speedometer driven gear
  • Speedometer gear retaining clip
  • Electronic speedometer sensor option
  • Wiring harnesses (speedometer sensor, reverse lockout controller, reverse lights)
  • Transmission mount
  • Sheet metal tunnel extension
  • Driveshaft yoke (1310, 1330, or 1350 U-joint sizes available)
  • ATF transmission fluid (4 quarts)
  • Lifetime technical support
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