TREMEC Magnum 6-Speed Package | 1967 Pontiac/Olds/Buick A-Body

TREMEC Magnum 6-Speed Package | 1967 Pontiac/Olds/Buick A-Body

TREMEC Magnum 6-Speed Package | 1967 Pontiac/Olds/Buick A-Body

Description

Key Features

  • 700 lb-ft torque capacity - handles serious power from built 400s, 455s, and stroker combinations
  • Double overdrive ratios (0.80 5th, 0.63 6th) - dramatically reduces highway RPM for improved fuel economy and engine longevity
  • 26-spline input shaft with generously long splines - accommodates twin-disc clutch setups
  • 140 lb dry weight - manageable for a 6-speed with this torque rating
  • 3.66-quart fluid capacity - uses TREMEC HP-MTF, Synchromesh, or Dexron III ATF
  • Triple-cone synchronizers on gears 1-4, double-cone on 5-6 and reverse - smooth, high-RPM shift capability
  • One-piece forged countershaft with widened gear faces - eliminates weak point of earlier two-piece designs
  • Complete customizable package - transmission, clutch, hydraulics, shifter, and all supporting components
  • BOP-specific bellhousing compatibility - proper fitment for Buick, Oldsmobile, and Pontiac engines

Description

Finding a bulletproof 6-speed for your '67 GTO, Cutlass, or Skylark that can handle big-block power while delivering civilized street manners has always been a challenge. The MDL TREMEC Magnum package solves that problem with a transmission rated for 700 lb-ft of torque while providing unbelievably crisp shifts. Whether you're running a numbers-matching 400 or a built 455 with forced induction, this is the drivetrain upgrade your A-body deserves.

The Magnum represents the pinnacle of TREMEC's aftermarket engineering - based heavily on the TR-6060 found in modern muscle cars like the Dodge Challenger, Chevrolet Camaro, and Corvette, but purpose-built for retrofitting into classic applications. The double overdrive ratios mean your Pontiac V8 can lope at reasonable RPM on the interstate while still pulling hard when you drop the hammer. Widened gear face widths are forged with laser-beam welded engagement teeth for precise pitch control and positive stops that prevent over-travel on hard shifts. The one-piece countershaft eliminates the torque-limiting splined connection of earlier T56 designs, while split-ring retainers replace traditional snap rings for greater thrust load capacity and tighter tolerances.

MDL's guided package selection walks you through every component choice - from transmission gear ratios and clutch specifications to hydraulic systems and shifter options. Available gear ratio sets include close-ratio (2.66 first) and wide-ratio (2.97 first) configurations, each with the signature 0.80/0.63 double overdrive. The 26-spline input shaft accommodates both single and twin-disc clutch assemblies, and the reversible TKO-style shifter offers smooth, positive shift action.

Due to the Magnum's case dimensions, tunnel modifications are required. MDL offers a sheet metal tunnel extension designed to attach to the original floor pan, maintaining structural integrity while providing proper clearance. This package is compatible with 1967 Buick, Oldsmobile, and Pontiac A-body vehicles including GTO, LeMans, Cutlass, 442, Skylark, and GS models with small or big block V8 engines. A six-speed BOP bellhousing is required to mate the transmission to your engine.

Package Components

Package components vary based on your specific selections through MDL's guided configuration process. Available components include:

  • TREMEC T56 Magnum transmission (multiple gear ratio options available)
  • Six-speed bellhousing with BOP bolt pattern
  • Billet aluminum flywheel (early or late balance options)
  • Flywheel bolt kit (standard or ARP)
  • Performance clutch kit with hydraulic release bearing compatibility
  • Pressure plate bolt kit (standard or ARP)
  • Clutch pedal assembly
  • Hydraulic master cylinder kit
  • Hydraulic release bearing
  • Braided stainless hydraulic line
  • Custom shifter with handle and knob options
  • Shift boot
  • Speedometer drive components (cable adapter, gears, or electronic sensor)
  • Reverse lockout controller and wiring harnesses
  • Transmission mount
  • Tunnel modification kit
  • TREMEC-approved transmission fluid (4 quarts)
  • Complete hardware and installation instructions
  • MDL lifetime technical support
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