The TREMEC TUKT12021 T56 Magnum XL 6-Speed Transmission is a premium, race-proven manual transmission designed specifically for 2005+ Ford Mustang Modular V8 applications, including Coyote and Godzilla engine platforms. Based on the legendary TR-6060 architecture, the Magnum XL combines OEM refinement with aftermarket strength, making it the ideal choice for high-performance street cars, track builds, and pro-touring Mustangs.
Featuring a 2.97:1 first gear ratio, double overdrive (0.80/0.63), and an impressive 700 lb-ft torque capacity, the T56 Magnum XL delivers exceptional acceleration while maintaining low highway cruising RPM. The extended XL tail housing places the shifter in the factory location, eliminating the semi-remote shifter found in many late-model Mustangs and providing shorter, more precise gear changes.
Features
- Genuine TREMEC T56 Magnum XL 6-Speed Manual Transmission
- Manufacturer Part Number: TUKT12021
- Designed for 2005+ Ford Mustang Modular V8 applications
- Fits Coyote and Godzilla engine platforms
- 700 lb-ft torque capacity
- Wide-ratio gear set with 2.97:1 first gear
- Double overdrive gears for relaxed highway cruising
- Extended XL tail housing for factory shifter location
- Direct-mount short-throw shifter
- SFI-approved steel bellhousing included
- Mustang-specific transmission crossmember and mount included
- Lightweight aluminum case
- Electronic speedometer output
- Hydraulic clutch release compatibility
- OEM-quality synchronizers for smooth shifting
- Built from 100% brand-new OEM-quality components
Gear Ratios
- 1st Gear: 2.97:1
- 2nd Gear: 2.10:1
- 3rd Gear: 1.46:1
- 4th Gear: 1.00:1
- 5th Gear: 0.80:1
- 6th Gear: 0.63:1
- Reverse: 2.90:1
Specifications
- Brand: TREMEC
- Manufacturer Part Number: TUKT12021
- Model: T56 Magnum XL
- Transmission Type: 6-Speed Manual
- Application: Ford Modular V8 / Mustang
- Torque Capacity: 700 lb-ft
- Maximum Rated RPM: 7,800 RPM
- Case Material: Aluminum
- Input Shaft Diameter: 1.125 inches
- Input Shaft Spline Count: 26
- Output Shaft Diameter: 1.375 inches
- Output Shaft Spline Count: 31
- Release Type: Hydraulic
- Speedometer Output: Electronic
- Shifter Included: Yes
- Bellhousing Included: Yes (SFI-approved steel)
- Crossmember Included: Yes
- Transmission Mount Included: Yes
- Yoke Included: No
- Driveshaft Included: No
- Fluid Capacity: Approximately 3.66 quarts
Package Includes
- TREMEC T56 Magnum XL 6-Speed Transmission
- SFI-Approved Steel Bellhousing
- Direct-Mount Short-Throw Shifter
- Mustang-Specific Crossmember
- Transmission Mount
- Shift Ball
- Reverse Lockout Components
- Installation Hardware
- Manufacturer Documentation
Recommended Applications
Ideal for:
- 2005–2014 Ford Mustang GT
- Ford Mustang Boss 302
- Ford Mustang Coyote Swap Projects
- Godzilla V8 Conversion Projects
- Restomod Mustangs
- Pro-Touring Builds
- High-Performance Street Cars
- Road Racing
- Drag Racing
- Autocross Applications
Installation Requirements
Installation may require:
- 26-spline clutch disc
- One-piece driveshaft
- Hydraulic clutch system
- Compatible flywheel
- Pilot bearing
- Transmission fluid
- ECU tuning (where applicable)
Professional installation is recommended to ensure proper alignment and maximum performance.
Warranty
The TREMEC TUKT12021 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.



