ProFit Wide Ratio Magnum 6-Speed Transmission and Installation Kit (70-74 Firebird)Find parts that fit my vehicle

American Powertrain Tremec T-56 Magnum Manual Transmissions and Installation Kits

American Powertrain Tremec T-56 Magnum manual transmissions and installation kits are designed to withstand up to 700 lbs.-ft. of torque. Their gears feature substantially increased face widths and 2-piece laser-beam welded construction, allowing for greater control of the tooth angles, pitch, and alignment. The transmissions also include a bolstered one-piece countershaft to resist distortion, and a stronger input shaft.

Magnum's new synchronizers are built with fine-tooth angles, redesigned shift forks—and an extensively modified transmission case to prevent leaks under high-stress conditions and increase overall power-handling capabilities. Nearly two dozen models are available; choose the kit recommended for your vehicle application.

Kits include:

Cryo-hardened steel driveshaft slip yoke with 1330 style U-joint
Mechanical speedometer conversion
VSS wiring harness for electronic speedometer of EFI ECU
Reverse light wiring, weather seal harness, non-polar
Reverse lockout wiring harness
ISO-X ballistic, low-profile transmission mount
Steel roller pilot bearing
White shift knob with black 6-speed shift pattern

Fitment:

• 1970 Pontiac Firebird
• 1971 Pontiac Firebird
• 1972 Pontiac Firebird
• 1973 Pontiac Firebird
• 1974 Pontiac Firebird

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