TREMEC TUKT16901 T56 Magnum XL 6-Speed Transmission Ford 2.66 1st

The TREMEC TUKT16901 T56 Magnum XL 6-Speed Transmission is a premium aftermarket manual transmission engineered specifically for 2005 and newer Ford Mustang applications. Built on the legendary TR-6060 platform, the Magnum XL delivers outstanding strength, smooth shifting, and race-proven durability, making it an ideal upgrade for high-performance street cars, pro-touring builds, road racing vehicles, and drag racing applications.

Designed with an extended-length (XL) tail housing, the TUKT16901 positions the shifter in the factory location, simplifying installation while providing a rigid direct-mount shifter for crisp, precise gear changes. Unlike factory semi-remote shifter designs, the Magnum XL significantly improves shift feel and accuracy under aggressive driving conditions while maintaining excellent noise and vibration isolation.

Rated to handle up to 700 lb-ft of torque and engine speeds up to 7,800 RPM, the Magnum XL is built with high-strength gears, premium synchronizers, and a reinforced one-piece countershaft capable of supporting naturally aspirated, supercharged, turbocharged, and stroker engine combinations. Dual overdrive gears reduce engine RPM during highway cruising for improved fuel economy, quieter operation, and reduced engine wear.

Whether you’re replacing a factory transmission or building a high-horsepower Mustang, the TREMEC Magnum XL delivers the performance, reliability, and driving experience expected from one of the industry’s most respected six-speed manual transmissions.

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Features

• Genuine TREMEC Magnum XL 6-Speed Manual Transmission
• Manufacturer Part Number: TUKT16901
• Designed for 2005 and newer Ford Mustang applications
• Close-ratio gear set
• Rated for up to 700 lb-ft of torque
• Maximum engine speed of 7,800 RPM
• Extended-length Magnum XL tail housing
• Direct-mount isolated shifter
• Lightweight high-strength aluminum case
• Fully synchronized forward gears
• Dual overdrive gears for reduced highway RPM
• Hydraulic clutch release system
• Electronic speedometer output
• Ideal for street performance, pro-touring, road racing, drag racing, and restomod builds

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Gear Ratios

• 1st Gear: 2.66:1
• 2nd Gear: 1.78:1
• 3rd Gear: 1.30:1
• 4th Gear: 1.00:1
• 5th Gear: 0.80:1
• 6th Gear: 0.63:1
• Reverse: 2.90:1

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Specifications

• Brand: TREMEC
• Manufacturer Part Number: TUKT16901
• Transmission Type: 6-Speed Manual
• Application: 2005-Up Ford Mustang
• Torque Capacity: 700 lb-ft
• Maximum Engine Speed: 7,800 RPM
• Case Material: Aluminum
• Approximate Dry Weight: 150 lbs
• Input Shaft Diameter: 1.125 inches
• Input Shaft Spline Count: 26
• Output Shaft Spline Count: 31
• Release Type: Hydraulic
• Speedometer Output: Electronic
• Fluid Capacity: Approximately 3.66 Quarts
• Recommended Fluid: TREMEC HP-MTF, Synchromesh, or Dexron III ATF
• Overdrive: Double
• Shifter Style: Direct-Mount
• Bellhousing Included: Yes
• Crossmember Included: Yes
• Transmission Mount Included: Yes
• Shifter Handle Included: Yes

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Recommended Applications

Designed primarily for:

• 2005–2010 Ford Mustang GT
• 2011–2014 Ford Mustang GT
• 2015–2019 Ford Mustang (conversion applications)
• Ford Mustang Restomod Projects
• Coyote Engine Swaps
• High-Performance Street Cars
• Pro-Touring Builds
• Road Race Vehicles
• Drag Racing Applications

Vehicle compatibility depends on the proper clutch assembly, driveshaft, hydraulic release system, transmission mount, and supporting components.

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Installation Requirements

Depending on your vehicle, installation may require:

• 26-spline clutch disc
• Hydraulic clutch release system
• One-piece driveshaft with 31-spline slip yoke
• Flywheel
• Pilot bearing
• Speedometer recalibration for certain applications
• Transmission fluid
• Installation hardware

Professional installation is recommended to ensure proper fitment and long-term reliability.

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Package Includes

• TREMEC TUKT16901 Magnum XL 6-Speed Transmission
• SFI-Approved Steel Bellhousing
• Direct-Mount Isolated Shifter
• Crossmember
• Transmission Mount
• Shifter Handle
• Shift Ball
• Manufacturer Documentation

Additional clutch components, driveshaft, flywheel, hydraulic release bearing, and installation hardware may be required depending on the application.

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Warranty

The TREMEC TUKT16901 T56 Magnum XL 6-Speed Transmission is backed by a 1-Year Limited Warranty, covering defects in materials and workmanship under normal use and proper installation.