Specifications
The T56 transmission is a 6-speed manual gearbox, known for its strength and smooth shifting. It features a cast aluminum case, triple-cone synchronizers on lower gears for improved shifting, and a 1:1 fifth gear with a 0.50 or 0.62 overdrive sixth gear, depending on the model. Designed for high-performance vehicles like the Camaro, Corvette, and Viper, the T56 offers a torque capacity between 400–550 lb-ft, making it ideal for both street and track use. Its robust design, hydraulic clutch and wide aftermarket support make it favorite among performance enthusiasts and custom builders.
Transmission Variant
TR-6060
The TREMEC TR-6060 is a 6-speed manual transmission built for high-performance, rear-wheel-drive vehicles. It features aluminum construction, advanced synchronizers, and helical gears for smooth, durable shifting. With a torque capacity of up to 600 lb-ft and ratios like 2.66:1 (1st) to 0.63:1 (6th), it’s ideal for powerful sports cars and muscle machines. Known for strength, precision, and efficiency, it’s a top choice for modern performance builds and swaps.
T56 Magnum
It features a 6-speed manual layout with triple-cone synchronizers on the lower gears and double-cone synchronizers on the upper ones for smoother, faster shifts. The Magnum is constructed with a stronger cast-aluminum case, reinforced internals, and high-capacity tapered roller bearings, giving it an impressive torque capacity of up to 700 lb-ft. Gear ratios typically include a 2.66 or 2.97 first gear and dual overdrives (0.80/0.63 or 0.74/0.50) for excellent highway efficiency
T56 Magnum XL
It features a 6-speed manual configuration with triple- and double-cone synchronizers for crisp, high-speed shifting and a one-piece extended tail housing that positions the shifter further back ideal for vehicles like the 2011–2014 Mustang GT and similar setups. Built from a high-strength aluminum case with reinforced internals, it offers a torque capacity of up to 700 lb-ft, making it suitable for high-horsepower applications. The transmission typically comes with 2.66 or 2.97 first gear ratios and dual overdrives (0.80/0.63 or 0.74/0.50) for strong acceleration and relaxed cruising.
Frequently Asked Questions
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Which cars originally used the T56 transmission?
Commonly found in Dodge Viper, Chevy Corvette, Camaro SS, Ford Mustang GT500, Pontiac GTO, and HSV performance vehicles.
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Can the T56 handle modified engines?
Yes. It’s designed for high torque applications and is popular for engine swaps and high-performance builds.
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What are signs a T56 needs replacement?
Worn synchronizers, hard shifting, gear grinding, and clutch slippage are common indicators.
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Is the T56 better than a Tremec Magnum or TR6060?
The T56 is lighter and offers smooth shifts, while TR6060 or Magnum units handle higher torque levels for extreme builds.
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Can I use a T56 from a Corvette in a Camaro?
With proper bellhousing and clutch compatibility, many GM performance models are interchangeable.
T56 Transmission
