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    TREMEC Magnum 6-Speed Conversion Package | 1964-1966 GTO, Olds, Buick A-Body
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    TREMEC Magnum 6-Speed Conversion Package | 1964-1966 GTO, Olds, Buick A-Body

    Description ▼▲

    Key Features

    • 700 lb-ft torque capacity - handles supercharged, turbocharged, and high-output naturally aspirated BOP V8 builds
    • Multiple gear ratio options - 2.66 close-ratio or 2.97 wide-ratio first gear with 0.80/0.63 or 0.74/0.50 double overdrive combinations
    • 26-spline input shaft and 31-spline output shaft - compatible with a wide range of clutch and driveline components
    • 4616 chromoly gears with laser-beam welded construction - substantially increased face widths for maximum strength and precise tooth geometry
    • One-piece countershaft and triple-cone synchronizers - eliminates the weak two-piece T56 design for improved durability and smoother shifts
    • Fully guided package configurator - select transmission ratio, bellhousing, hydraulic clutch system, flywheel, shifter, and driveline components tailored to your build
    • Complete auto-to-manual conversion - includes tunnel extension for proper Magnum case clearance
    • Lifetime MDL technical support included

    Description

    This complete TREMEC Magnum conversion package transforms your 1964-1966 Pontiac GTO, Oldsmobile, or Buick A-Body from an outdated automatic to a modern 6-speed manual with double overdrive. The Magnum is derived from the OEM TR-6060 found in today's factory muscle cars like the Dodge Challenger, Viper, and Chevrolet Camaro - delivering 700 lb-ft of torque capacity and unbelievably crisp shifts that put a massive grin on your face every time you row through the gears.

    Inside, the Magnum benefits from the same durable componentry found in today's hardest-hitting OEM muscle and sports cars. Over the original T56, the Magnum boasts increased face width on all gears, a robust combination of double and triple-cone synchronizers, enhanced webbing in the main case, and provisions for a cooler circuit. The 4616 chromoly gears feature two-piece laser-beam welded construction, allowing for greater control of tooth angles, pitch, and alignment - while the one-piece countershaft eliminates the torque-limited splined connection of earlier T56 designs.

    The Magnum case dimensions require tunnel modifications for A-Body installation. We include a precision-formed sheet metal tunnel extension that attaches directly to your original floor pan. Our package configurator walks you through every decision - transmission ratio selection, bellhousing choice (aluminum or SFI-certified steel for competition), hydraulic clutch systems with master cylinder and release bearing options, flywheels for 455 Pontiac applications, shifters, speedometer solutions, and driveline components including multiple U-joint size options.

    MDL's concierge service ensures you get the right parts for your project and budget. Whether you're building a weekend cruiser or a full-tilt street machine, this package delivers the performance and reliability that only comes from 100% brand-new OEM-quality components with lifetime technical support from our Idaho-based team.

    Package Configuration Includes

    • TREMEC Magnum 6-speed transmission (multiple ratio configurations available)
    • BOP-pattern bellhousing (aluminum or SFI 6.1 certified steel options)
    • Transmission mounting hardware kit
    • Steel flywheel (455 Pontiac applications)
    • Flywheel bolt set (standard or ARP options)
    • 10.5-inch hydraulic clutch assembly (multiple torque capacity options)
    • Pressure plate bolt kit (standard or ARP options)
    • Clutch pedal pad conversion kit
    • Hydraulic master cylinder kit (multiple mounting configurations)
    • Hydraulic release bearing
    • Braided stainless hydraulic line
    • Shift lever and knob options
    • Shift boot with hardware
    • Speedometer cable adapter and driven gear selection
    • Electronic speedometer sensor and harness options
    • Reverse lockout controller and harness options
    • Transmission mount
    • Tunnel extension kit
    • DEXRON VI transmission fluid (4 quarts)
    • Driveshaft yoke (1310, 1330, or 1350 U-joint options, 31-spline)
    • Lifetime MDL technical support
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