Subaru Legacy GT Spec B 6-Speed 6MT TY856WBDAA

Description

The JDM Subaru Legacy GT Spec B 6-speed transmission (TY856WBDAA) is a premium OEM gearbox imported directly from Japan. Known for strength and precision, this 6-speed manual transmission is engineered to handle turbocharged power with smooth gear engagement and long-term durability. With only 45,000 miles, this transmission offers exceptional value for drivers restoring or upgrading their Subaru.

Performance & Reliability

The TY856WBDAA 6MT gearbox is built with durability in mind. Subaru engineered this transmission for the Legacy GT Spec B, a performance sedan that demanded precise shifting and higher torque capacity than the standard 5-speed. This gearbox is closely related to the WRX STI 6-speed but tuned specifically for Legacy driving dynamics.

Each transmission is fully compression-tested before export to ensure proper synchronization, smooth gear changes, and reliability. With an estimated 45,000 miles of usage, it is considered low mileage by JDM standards. This means plenty of life remains, making it a cost-effective solution compared to rebuilding an older, worn gearbox.

Fitment

The TY856WBDAA is a direct fit for the 2007 Subaru Legacy GT Spec B. With proper supporting components, it can also be swapped into other Subaru models that benefit from the 6-speed upgrade.

Fits in:

Subaru Legacy GT Spec B (2006–2009) – direct fit

Subaru Legacy GT (2005–2009) – swap upgrade

Subaru WRX (2002–2007) – swap upgrade with driveshaft and rear diff

Subaru WRX STI (2004–2007) – compatible with modification

Subaru Forester XT (2004–2008) – upgrade swap with supporting parts

Subaru Outback XT (2005–2009) – upgrade swap with modification

Always verify final drive ratio and compatibility with your differential and ECU before installation.

Warranty & Installation

This JDM Subaru transmission comes with a 6-month limited startup warranty covering internal defects. To ensure proper fitment and long life, professional installation is highly recommended. Installers should check the clutch assembly, driveshaft compatibility, and differential ratio before completing the swap. Using OEM fluids and proper alignment will provide the best results.

Conclusion

The Subaru Legacy GT Spec B TY856WBDAA 6-speed transmission is the ideal solution for restoring factory performance or upgrading to a stronger gearbox. With proven durability, precise shifting, and only 45,000 miles, it offers OEM reliability at a fraction of the cost of a brand-new unit. Whether you are maintaining a Spec B or performing a performance swap in a WRX, Legacy GT, or Forester XT, this gearbox is a trusted choice for enthusiasts.