JDM 2007–2009 Subaru Legacy Spec B Tuned by STI TY856WBEAA 6-Speed Manual AWD Complete Swap Package

Upgrade your Subaru with one of the most desirable factory JDM Legacy performance drivetrains: the Subaru Legacy Spec B Tuned by STI TY856WBEAA 6-speed manual AWD transmission package.

Imported directly from Japan, this genuine Subaru OEM drivetrain package centers around the rare TY856WBEAA non-DCCD 6-speed manual transmission originally used in high-performance Legacy Spec B Tuned by STI applications.

Unlike a transmission-only purchase, this package includes critical matching drivetrain and braking components from the donor application, making it particularly desirable for Legacy GT upgrades, Spec B restorations, 5MT-to-6MT conversions, and carefully planned Subaru performance builds.

The primary product relationship is:

Subaru Legacy Spec B Tuned by STI → 2007–2009 → TY856WBEAA → 6-Speed Manual → Non-DCCD → AWD → Matching Rear Differential → Rear Axles → Brembo Brakes

QUICK DETAILS

• Manufacturer: Subaru
• Donor Model: Legacy Spec B Tuned by STI
• Years: 2007–2009
• Transmission Code: TY856WBEAA
• Serial Number: TY856WBEAA 128721
• Transmission Family: TY856
• Transmission Type: Manual
• Gears: 6
• Center Differential: Non-DCCD
• Drivetrain: AWD
• Rear Differential: R180 – verify exact physical ratio
• Rear Axles: Included
• Brembo Brake Calipers: Included
• Condition: Used OEM JDM / Low Mileage
• Origin: Japan
• Item ID: 6MT041
• SKU: TY856WBEAA 124827 6MT041
• Actual Product Photos: Yes
• Warranty: 30 Days
• Shipping: Nationwide Freight
• Installation: Available
• Local Pickup: Richmond / Henrico, Virginia

TY856WBEAA TRANSMISSION

The most important identifier for this drivetrain package is:

TY856WBEAA

Use the complete transmission code throughout the product page.

Do not reduce the product identity to simply:

TY856

Subaru produced numerous TY856 6-speed transmissions with different:

• Vehicle applications
• Final-drive configurations
• Center differentials
• DCCD systems
• Differential ratios
• Axles
• Sensors
• Switches
• Hubs
• Driveshaft configurations

For Google, Bing and AI/LLM search, TY856WBEAA should appear naturally in:

• Product title
• H1
• Product Code
• Transmission Code
• Short description
• Quick Details
• Long description
• FAQ
• Product schema
• Image ALT text
• Image titles
• Product tags

NON-DCCD 6-SPEED TRANSMISSION

One of the most important characteristics of the TY856WBEAA is its:

NON-DCCD configuration.

DCCD stands for:

Driver Controlled Center Differential.

Many Subaru WRX STI TY856 transmissions use an electronically controlled DCCD system.

This Legacy Spec B TY856WBEAA is different.

The non-DCCD configuration can be attractive for certain swap applications because it eliminates the need to integrate the conventional WRX STI DCCD controller and associated driver controls.

However, non-DCCD does NOT mean universal plug-and-play installation.

The complete drivetrain configuration must still be verified.

6-SPEED MANUAL / 6MT

This is a genuine Subaru:

6-Speed Manual Transmission

Common search terminology includes:

6MT

Subaru 6 Speed

Legacy 6 Speed

Legacy Spec B 6MT

Subaru STI 6MT

TY856 6MT

TY856WBEAA 6MT

This transmission should not be confused with Subaru’s TY758 5-speed manual transmissions.

LEGACY SPEC B TUNED BY STI

This package is associated with the Japanese-market Subaru Legacy Spec B Tuned by STI performance platform.

The Tuned by STI vehicles received factory performance-oriented upgrades and are highly desirable among Subaru enthusiasts.

For SEO purposes, use both search variations naturally:

Legacy Spec B Tuned by STI

and

Legacy Spec B STI

However, the technically cleaner product name is:

Subaru Legacy Spec B Tuned by STI

TRANSMISSION CODE

Use:

Product Code: TY856WBEAA

Transmission Code: TY856WBEAA

Serial Number: TY856WBEAA 128721

Do not use:

Product Code: Legacy Spec B TY856WBEAA

The vehicle name belongs in the product title and application fields.

The machine-readable Product Code should contain the actual transmission code:

TY856WBEAA

COMPLETE SWAP PACKAGE

This is much more than a standalone transmission.

The package includes major drivetrain and braking components from the JDM donor vehicle.

Core components currently identified with this package include:

• TY856WBEAA 6-Speed Manual Transmission
• Matching Rear Differential
• Matching Rear Axles
• OEM Subaru Brembo Brake Calipers
• Associated donor drivetrain components shown in the actual photographs

Only components specifically listed or visible in the actual Item ID 6MT041 photographs should be considered included.

R180 REAR DIFFERENTIAL

The current product title and primary description identify the included differential as:

R180

The R180 is Subaru’s larger performance-oriented rear differential commonly associated with stronger Subaru drivetrain applications.

The R180 differential provides a more robust drivetrain solution than the smaller R160 commonly found in many standard Subaru applications.

However, the exact differential installed in THIS package must be physically verified before publication and shipment.

Do not rely solely on historical listing copy.

Confirm:

• R180 housing
• Differential code
• Final-drive ratio
• Output configuration
• Axle compatibility
• Input flange
• LSD type, if applicable

CRITICAL FINAL-DRIVE VERIFICATION

The current structured product data lists:

Final Drive: 3.90

Before retaining this specification, physically verify the transmission and rear differential.

The final-drive relationship is critical in a Subaru AWD drivetrain.

The transmission’s front final drive and rear differential must operate with compatible ratios.

An incorrect front-to-rear ratio can cause:

• Severe drivetrain binding
• Tire scrubbing
• Center differential stress
• Excessive heat
• Transmission damage
• Differential damage
• Axle damage

Therefore, do not ship this package until the front and rear drivetrain ratios have been verified.

DO NOT USE 3.54 UNTIL VERIFIED

Some previous J-Spec TY856WBEAA descriptions reference:

R180 3.54

while the current structured data says:

3.90

Do not combine these numbers.

Do not write:

3.54 / 3.90

Instead, physically identify the differential and transmission.

Once confirmed, publish ONE exact specification.

Recommended format:

Transmission Final Drive: [VERIFIED RATIO]

Rear Differential: R180 [VERIFIED MATCHING RATIO]

This is substantially safer than publishing conflicting drivetrain information.

REAR AXLES INCLUDED

The current package includes matching rear axles.

This is important because R180 conversions frequently require compatible R180 axle components.

Highlight:

Matching Rear Axles Included

near the top of the page.

Before installation, inspect:

• CV boots
• Inner joints
• Outer joints
• Splines
• Shaft condition
• Excessive play
• Grease leakage

BREMBO BRAKE CALIPERS INCLUDED

OEM Subaru Brembo brake calipers are included with this package.

This significantly increases the value and search potential of the listing.

Include keywords naturally such as:

Subaru Brembo Brakes

Legacy Spec B Brembo Brakes

Subaru Brembo Conversion

Subaru 6MT Brembo Swap

Do not claim that every component required for a complete Brembo conversion is included unless the actual Item ID 6MT041 photographs confirm it.

VERIFY HUBS

Previous TY856WBEAA J-Spec packages have included:

5×100 hubs

However, do not automatically state that this individual Item ID 6MT041 includes all four hubs unless they are physically present.

If included, add:

Hub Bolt Pattern: 5×100

Hubs: OEM Subaru 5×100 Hubs Included

This is an excellent SEO term because Subaru enthusiasts specifically search:

5×100 6 speed swap

5×100 R180 conversion

Legacy GT 5×100 6MT swap

VERIFY DRIVESHAFT

Previous TY856WBEAA packages have also included the matching driveshaft.

If the actual Item ID 6MT041 package contains the driveshaft, add:

Driveshaft: OEM Matching 6MT Driveshaft Included

This is a major selling feature for customers converting from a Subaru 5-speed to a 6-speed.

Do not add it unless physically confirmed.

VERIFY SHIFTER ASSEMBLY

If included, specifically identify:

6MT Shifter Assembly

6MT Shifter Linkage

Shifter Stay

Shift Lever

Bushings

A 5MT-to-6MT conversion often requires the appropriate 6-speed shifter hardware.

This should be photographed separately and indexed for Google Images.

LEGACY GT 5MT-TO-6MT CONVERSION

This package may be useful for properly planned Legacy GT 5-speed-to-6-speed conversions.

A typical conversion may require consideration of:

• 6MT transmission
• Matching rear differential
• Rear axles
• Front axles
• Driveshaft
• Shifter assembly
• Clutch
• Flywheel
• Transmission crossmember
• Hubs
• Brake components
• Sensors
• Switches
• Wiring
• Differential ratio

Do not market the package as universally plug-and-play.

Use:

Excellent foundation for a Legacy GT 6-speed conversion after complete fitment verification.

WRX 5MT-TO-6MT CONVERSION

This drivetrain can also be considered for custom WRX 6MT conversions.

However:

Legacy Spec B TY856WBEAA → WRX

is a conversion application, not necessarily direct factory interchange.

Verify:

• Transmission mounts
• Driveshaft
• Axles
• Hubs
• Clutch
• Flywheel
• Shifter
• Speed signal
• Neutral switch
• Reverse switch
• Rear differential
• Final drive

FORESTER XT 6MT CONVERSION

The TY856WBEAA can also attract Subaru Forester XT swap customers.

Keep Forester XT in the long description and FAQ rather than the primary product title.

The primary SEO entity should remain:

Subaru Legacy Spec B TY856WBEAA

This prevents the page from becoming diluted across too many models.

EJ-SERIES ENGINE COMPATIBILITY

This transmission can be used in appropriately configured Subaru EJ-platform performance builds.

Related engine searches include:

EJ20 6-speed transmission

EJ205 6-speed transmission

EJ207 6-speed transmission

EJ255 6-speed transmission

EJ257 6-speed transmission

However, engine bellhousing compatibility alone does not establish complete drivetrain compatibility.

Transmission fitment must include the entire AWD system.

TRANSMISSION FLUID

Use Subaru-approved manual transmission/front differential gear oil meeting the specification for the TY856 transmission.

A commonly specified viscosity for Subaru 6MT applications is:

SAE 75W-90

Use a high-quality gear lubricant suitable for synchronized manual transmissions and Subaru front differential operation.

Do not use:

• CVT fluid
• Conventional ATF
• Engine oil
• Used donor fluid
• Unverified universal fluids

REAR DIFFERENTIAL FLUID

The rear differential uses a separate gear-oil circuit.

Before installation:

• Drain the existing differential fluid.
• Inspect the fluid.
• Inspect the magnetic drain plug.
• Look for excessive metal.
• Clean the plug.
• Replace sealing washers when appropriate.
• Refill with fresh correct-specification gear oil.

DRAIN AND REFILL THE TRANSMISSION

Before installation:

• Drain existing transmission oil.
• Inspect the drain plug.
• Check for abnormal metal.
• Clean the magnetic plug.
• Replace sealing washers as required.
• Refill with fresh Subaru-approved gear oil.

Do not reuse donor transmission fluid.

INSPECT THE INPUT SHAFT

Before installation, inspect:

• Input-shaft splines
• Pilot-bearing surface
• Seal area
• Bearing play

Look for:

• Rust
• Damaged splines
• Burrs
• Excessive movement
• Abnormal wear

INSPECT THE CLUTCH SYSTEM

With the transmission removed, inspect:

• Clutch disc
• Pressure plate
• Flywheel
• Pilot bearing
• Release bearing
• Clutch fork
• Pivot
• Slave cylinder
• Hydraulic components

Replacing worn clutch components before installation can prevent unnecessary transmission removal later.

VERIFY CLUTCH CONFIGURATION

Do not assume every Subaru 6MT clutch system is identical.

Compare:

• Clutch type
• Release mechanism
• Release bearing
• Clutch fork
• Slave cylinder
• Flywheel
• Starter engagement

against the target vehicle.

INSPECT TRANSMISSION SEALS

Inspect:

• Input/front seal area
• Front axle seals
• Rear output seal
• Shifter seals
• Drain plug
• Fill plug

Replace questionable accessible seals before installation.

INSPECT DIFFERENTIAL SEALS

Inspect:

• Left axle seal
• Right axle seal
• Pinion seal
• Differential case
• Drain plug
• Fill plug

Repair any leakage before installation.

INSPECT BREMBO CALIPERS

Inspect each included brake caliper for:

• Piston movement
• Torn dust boots
• Fluid leakage
• Bleeder condition
• Thread condition
• Mounting surfaces
• Corrosion

Rebuild or service the calipers if required before installation.

JDM-TO-USDM FITMENT

Before installation, compare the JDM components directly against the target vehicle.

Verify:

• TY856WBEAA code
• Bellhousing
• Clutch configuration
• Transmission mount
• Crossmember
• Driveshaft
• Shifter assembly
• Axles
• Hubs
• Rear differential
• Differential ratio
• Neutral switch
• Reverse switch
• Speed signal
• Brake components

Keep the original vehicle components until the conversion has been successfully installed and road tested.

WHAT IS INCLUDED?

The core package currently consists of:

• TY856WBEAA 6-Speed Manual AWD Transmission
• Matching Rear Differential
• Matching Rear Axles
• OEM Subaru Brembo Brake Calipers
• Associated components shown in the actual product photos

Confirm additional components individually before publication.

If physically included, add them explicitly:

• Front Axles
• Front Hubs
• Rear Hubs
• Driveshaft
• 6MT Shifter Assembly
• Front Subframe
• Rear Subframe
• Aluminum Control Arms
• Trailing Arms
• Transmission Crossmember

The more accurately you identify every physical component, the better this page can rank for long-tail Subaru swap searches.

ACTUAL PRODUCT PHOTOS

Because this is a $6,000+ specialty drivetrain package, photograph every major component individually.

Recommended photos:

1. Complete drivetrain package
2. TY856WBEAA transmission
3. TY856WBEAA identification tag
4. Serial TY856WBEAA 128721
5. Bellhousing
6. Input shaft
7. Rear differential
8. Differential identification
9. Differential ratio marking
10. Rear axles
11. Front axles if included
12. Brembo front calipers
13. Brembo rear calipers
14. Hubs if included
15. Driveshaft if included
16. Shifter assembly if included
17. Subframes if included
18. Control arms if included

Actual detailed photographs are extremely valuable for buyer confidence, Google Images, visual search, and AI product understanding.

INITIAL INSTALLATION CHECKLIST

Before installation:

• Confirm TY856WBEAA transmission code.
• Confirm serial TY856WBEAA 128721.
• Confirm 6-speed manual configuration.
• Confirm non-DCCD configuration.
• Verify transmission final-drive ratio.
• Verify rear differential type.
• Verify rear differential ratio.
• Confirm front/rear ratios are compatible.
• Inspect transmission oil.
• Inspect rear differential oil.
• Replace fluids.
• Inspect input shaft.
• Inspect transmission seals.
• Inspect differential seals.
• Inspect rear axles.
• Inspect front axles if included.
• Verify hubs.
• Verify wheel bolt pattern.
• Inspect Brembo calipers.
• Verify driveshaft.
• Verify shifter assembly.
• Verify clutch.
• Verify flywheel.
• Verify transmission mount.
• Verify crossmember.
• Compare sensors and switches.
• Verify neutral switch.
• Verify reverse-light switch.
• Confirm driveshaft fitment.
• Confirm axle fitment.
• Confirm brake fitment.
• Check for leaks.

INITIAL ROAD TEST

Begin with a conservative road test.

Check:

• 1st gear engagement
• 1–2 shift
• 2–3 shift
• 3–4 shift
• 4–5 shift
• 5–6 shift
• Downshifts
• Reverse engagement
• Synchronizer operation
• Gear whine
• Bearing noise
• Gear pop-out
• Clutch operation
• Shifter operation
• Driveshaft vibration
• Axle vibration
• Differential noise
• AWD binding
• Brake operation
• Fluid leaks

Stop immediately if drivetrain binding occurs.

COMMON SIGNS OF SUBARU 6MT PROBLEMS

Possible transmission-related symptoms include:

• Gear grinding
• Difficult shifting
• Synchronizer problems
• Gear pop-out
• Transmission whine
• Bearing noise
• Difficult Reverse engagement
• Shifter vibration
• Oil leaks
• Clunking

However, similar symptoms may come from:

• Clutch wear
• Pilot bearing
• Release bearing
• Transmission mount
• Driveshaft
• Axles
• Rear differential
• Shifter bushings

Proper diagnosis should be completed before replacing the transmission.

WHY CHOOSE THIS TY856WBEAA PACKAGE?

This package offers a rare combination of genuine JDM Subaru performance components centered around the TY856WBEAA Legacy Spec B Tuned by STI 6-speed transmission.

Key features include:

• Genuine JDM Subaru drivetrain
• TY856WBEAA transmission
• 6-speed manual
• Non-DCCD center differential
• AWD
• Matching rear differential
• Matching rear axles
• OEM Brembo brake calipers
• Legacy Spec B Tuned by STI donor application
• Low-mileage Japanese import
• Individual serial identification
• Actual inventory photos
• 30-day limited warranty
• Nationwide freight shipping
• Affordable installation available

WHY BUY FROM J-SPEC AUTO SPORTS?

J-Spec Auto Sports has specialized in Japanese engines, transmissions, and drivetrain components for more than 20 years.

Customers benefit from:

• Actual inventory photography
• Complete transmission-code identification
• Individual serial tracking
• Subaru drivetrain experience
• Rare JDM inventory
• Nationwide freight shipping
• Local Richmond / Henrico pickup
• Installation availability
• Limited warranty coverage

INDIVIDUAL INVENTORY INFORMATION

Donor Vehicle: Subaru Legacy Spec B Tuned by STI

Years: 2007–2009

Transmission Code: TY856WBEAA

Serial Number: TY856WBEAA 128721

Transmission Family: TY856

Transmission: 6-Speed Manual / 6MT

Center Differential: Non-DCCD

Drivetrain: AWD

Transmission Final Drive: VERIFY PHYSICALLY BEFORE PUBLISHING

Rear Differential: R180 – VERIFY PHYSICALLY

Rear Differential Ratio: VERIFY PHYSICALLY

Rear Axles: Included

Brembo Brake Calipers: Included

Item ID: 6MT041

SKU: TY856WBEAA 124827 6MT041

Condition: Used OEM JDM / Low Mileage

Warranty: 30 Days

30-DAY LIMITED WARRANTY

This individual drivetrain package carries a 30-day limited warranty subject to J-Spec Auto Sports’ current warranty terms and installation requirements.

Keep documentation for:

• Correct transmission fluid
• Rear differential fluid
• Clutch inspection
• Pilot/release bearing inspection
• Seal replacement
• Final-drive verification
• Professional installation

FREQUENTLY ASKED QUESTIONS

What is the transmission code?

TY856WBEAA

What is the serial number?

TY856WBEAA 128721

What transmission family is this?

Subaru TY856.

How many gears does it have?

Six forward gears.

Is this a manual transmission?

Yes.

It is a 6-speed manual / 6MT.

Does TY856WBEAA have DCCD?

No.

This transmission is a non-DCCD configuration.

What vehicle did this transmission come from?

The package is identified as a JDM Subaru Legacy Spec B Tuned by STI drivetrain.

What years does this application target?

The listing identifies 2007–2009 Subaru Legacy applications.

Is an R180 differential included?

The current title and primary description identify an R180 rear differential as included.

The physical differential should be verified before shipment.

What is the final-drive ratio?

The current product specifications list 3.90, while historical TY856WBEAA J-Spec descriptions contain conflicting differential-ratio information.

For this reason, physically verify the transmission and rear differential before publishing the final ratio.

Why is the rear differential ratio important?

Subaru AWD requires compatible front and rear drivetrain ratios.

An incorrect ratio can cause serious drivetrain binding and damage.

Are rear axles included?

Yes.

The current package identifies matching rear axles as included.

Are Brembo brakes included?

Yes.

OEM Subaru Brembo brake calipers are included according to the current product listing.

Are hubs included?

Verify Item ID 6MT041 physically.

If included, add them specifically to the package contents.

Is the driveshaft included?

Verify Item ID 6MT041 physically.

If included, list the matching 6MT driveshaft separately because it significantly increases the value of the package.

Is the shifter included?

Verify the actual inventory.

If present, list the complete 6MT shifter assembly and linkage.

Can this be used for a Legacy GT 6-speed swap?

Yes, it can provide an excellent foundation for a properly planned Legacy GT 5MT-to-6MT conversion.

Complete fitment verification is required.

Can it fit a Subaru WRX?

It may be used in appropriately planned WRX conversions, but it should not be marketed as universally plug-and-play.

Can it fit a Forester XT?

It may be useful for custom Forester XT 6-speed conversions after complete drivetrain fitment verification.

Is this the same as a WRX STI DCCD transmission?

No.

The TY856WBEAA is a non-DCCD transmission.

Is this the same as TY856WBDAA?

No.

TY856WBEAA and TY856WBDAA are separate complete Subaru transmission codes.

Do not combine them into one Product Code.

What transmission oil should be used?

Use Subaru-approved manual transmission/front differential gear oil meeting the specification for the exact TY856 application.

Should old transmission oil be reused?

No.

Drain the imported unit, inspect the fluid and magnetic drain plug, and refill with fresh correct-specification gear oil.

Should the rear differential fluid be changed?

Yes.

Drain, inspect, and refill the rear differential before installation.

Should the clutch be inspected?

Yes.

Inspect the clutch, pressure plate, flywheel, pilot bearing, release bearing, clutch fork, and hydraulic components while the transmission is removed.

Is this transmission rebuilt?

No.

Unless specifically stated otherwise, this is a used OEM JDM transmission.

Does it have a warranty?

Yes.

The current listing carries a 30-day limited warranty.

ORDER YOUR JDM LEGACY SPEC B TY856WBEAA 6MT PACKAGE

Upgrade your Subaru with this rare JDM Legacy Spec B Tuned by STI TY856WBEAA non-DCCD 6-speed manual AWD drivetrain package.

Core Package:

TY856WBEAA 6-Speed Manual Transmission

Matching Rear Differential

Matching Rear Axles

OEM Subaru Brembo Brake Calipers

Donor Application: Subaru Legacy Spec B Tuned by STI

Years: 2007–2009

Transmission Code: TY856WBEAA

Serial Number: TY856WBEAA 128721

Transmission: 6-Speed Manual / 6MT

Center Differential: Non-DCCD

Drivetrain: AWD

Item ID: 6MT041

SKU: TY856WBEAA 124827 6MT041

Warranty: 30 Days

Verify the transmission final drive, rear differential ratio, clutch system, driveshaft, axles, hubs, shifter assembly, sensors, switches, mounts, brakes, wheel bolt pattern, and complete physical configuration before ordering.