T56 Magnum 6-Speed Conversion Package | 1970-1972 Firebird | Pontiac V8

T56 Magnum 6-Speed Conversion Package | 1970-1972 Firebird | Pontiac V8

T56 Magnum 6-Speed Conversion Package | 1970-1972 Firebird | Pontiac V8

Description

Key Features

  • 700 lb-ft torque capacity handles big-block Pontiac power with ease
  • Double overdrive ratios (0.80/0.63 or 0.74/0.50) dramatically reduce highway RPM for improved fuel economy and reduced engine wear
  • Multiple TREMEC Magnum transmission options with close-ratio (2.66 first) or wide-ratio (2.97 first) gearing
  • Custom console shifter maintains factory appearance while delivering precise 6-speed control
  • 26-spline input shaft and 31-spline output shaft for maximum driveline strength
  • Triple cone synchronizers on gears 1-4, double cone on 5-6 for smooth, positive engagement
  • 135 lbs dry weight - reasonably light for a transmission of this capability
  • Complete package includes bellhousing, flywheel, clutch, hydraulic actuation, and all supporting hardware
  • Professional-grade McLeod, Tilton, and Centerforce clutch system options available
  • Minimal tunnel modifications required - retains original shifter location

Description

Transform your 1970-1972 Firebird into a modern performer without sacrificing its classic character. This complete TREMEC T56 Magnum package solves the fundamental problem of vintage F-bodies: great engines trapped behind obsolete drivetrains. The Magnum handles a massive 700 lb-ft of torque while providing unbelievably crisp shifts, making it the perfect match for built Pontiac 400s, 455s, and stroker combinations where the factory Muncie or Saginaw simply cannot keep up.

The engineering advantage starts with increased face-width on all gears, a robust combination of double and triple cone synchronizers, and enhanced webbing in the main case for extraordinary rigidity. Unlike the original T56, the Magnum features an isolator-type shifter that reduces in-cabin noise and vibrations while providing the precise, communicative shift feel that all Magnums are known for. The one-piece countershaft and strengthened input shaft - both forged from 4616 chromoly - deliver durability that matches the torque rating. Double overdrive gearing drops highway RPM significantly compared to a 4-speed, transforming long-distance driving while maintaining aggressive acceleration in the lower gears.

MDL's guided package builder walks you through every component selection: transmission ratio, bellhousing, flywheel (billet steel or aluminum options for Pontiac applications), clutch system, hydraulic master and release bearing, console, shift knob, speedometer components, reverse lockout, transmission mount, slip yoke, and fluid. Every component is selected specifically for Buick-Olds-Pontiac bellhousing patterns, ensuring proper fit and optimal performance. The custom console shifter mounts in the factory location for a period-correct interior appearance.

Compatible with all 1970-1972 Pontiac Firebird models equipped with Pontiac V8 engines. Little to no tunnel modification is required for installation, and the shifter position is retained for that stock look and feel. Contact MDL's technical team for concierge assistance in selecting the right components for your specific project and budget.

What's Included

  • TREMEC T56 Magnum 6-speed transmission (choice of close-ratio 2.66 or wide-ratio 2.97 first gear)
  • BOP-pattern aluminum bellhousing
  • Custom 6-speed console shifter assembly
  • Shift console (multiple finish options)
  • Shift knob with thread adapter options
  • Shift boot
  • Billet steel or aluminum flywheel for Pontiac 455 applications
  • ARP flywheel bolts
  • High-performance clutch kit (McLeod, Tilton, or Centerforce options)
  • Pressure plate bolts
  • Hydraulic master cylinder kit
  • Hydraulic release bearing
  • Braided stainless hydraulic line
  • Clutch pedal assembly with pad kit
  • Transmission mount
  • 31-spline slip yoke (multiple U-joint series available)
  • Speedometer gear, clip, and electronic harness
  • Reverse lockout controller and wiring harness
  • Reverse light harness
  • Bellhousing-to-transmission hardware kit
  • TREMEC-recommended ATF transmission fluid (4 quarts)
  • MDL lifetime technical support
Subtotal 0.00 0 selected
Final step

Review your build

Make sure everything looks right. Click Edit on any row to change a choice.

Package total 0.00