6-Speed Manual Transmission Assembly for 2018-2021 Subaru WRX
Product Notes Read before buying
This is a 6-speed manual transmission for the Subaru WRX with the 2.0L engine. It will not fit automatic (CVT) models or the WRX STI with the 2.5L engine. For the 2018 model year, this part fits vehicles produced on or after 06/21/2017.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 6 Man | Sedan | 2018 - 2021 | H4 2.0L Turbo | AWD | Manual |
| Base | Sedan | 2018 - 2021 | H4 2.0L Turbo | AWD | Manual |
| Limited | Sedan | 2018 - 2021 | H4 2.0L Turbo | AWD | Manual |
| Premium | Sedan | 2018 - 2021 | H4 2.0L Turbo | AWD | Manual |
| Sport | Sedan | 2018 - 2021 | H4 2.0L Turbo | AWD | Manual |
| Sport-tech | Sedan | 2018 - 2021 | H4 2.0L Turbo | AWD | Manual |
| Raui Edition | Sedan | 2019 | H4 2.0L Turbo | AWD | Manual |
| Sport-tech RS | Sedan | 2019 - 2020 | H4 2.0L Turbo | AWD | Manual |
Know This Transmission Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this transmission family:
A quick look at your own vehicle makes sure the right transmission shows up:
- Locate the white identification label on top of the current transmission bellhousing and confirm the code is TY751VB6CA.
- Confirm the vehicle is equipped with the 2.0L Turbocharged FA20DIT engine.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- T70 Torx Bit
- Transmission Jack
- Clutch Alignment Tool
- Engine Support Bar
- Extensions and swivels
Budget for these consumables at install:
- Manual Gear Oil: Subaru Extra MT (75W-80 GL-5) or high-quality API GL-5 compliant 75W-90 synthetic gear oil (approx. 3.5 US Quarts / 3.3 Liters)
- Clutch Kit (New clutch disc, pressure plate, and pilot bearing)
- Clutch Release (Throwout) Bearing (Updated OEM p/n 30502AA160)
- Rear Main Seal
- Axle Seals (Both front CV axle seals)
- Drain Plug Gasket (Aluminum or copper crush washer for T70 drain plug)
What your vehicle’s computers will need after the swap:
What’s involved: none
This is a conventional manual transmission with no Transmission Control Module (TCM) to program or marry to the VIN. If TSB 11-178-18 applies, a dealer reflash of the engine ECU (not the transmission) may be needed.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- The 'Snout' Wear Trap: Inspect the aluminum snout on the front of the transmission case for grooving. If worn, install a stainless steel snout repair sleeve kit (e.g., PDM USA TSK4) and matching oversized bearing.
- Loosen the Fill Plug First: Always loosen and remove the fill plug before draining the transmission fluid to ensure you can refill it.
- Axle Seal Protection: Be extremely careful not to nick or tear the delicate rubber lips of the new axle seals with the splines of the axle shaft during insertion.
- Clutch Fork and Pivot Point Lubrication: Clean and lubricate the clutch fork's pivot point inside the bellhousing with high-temperature grease to prevent squeaking.
- Bellhousing Dowels: Ensure alignment dowels are present and clean. Do not use bolts to pull the transmission to the engine.
Easy to get right once you know them:
- The 2015-2017 Final Drive Mismatch: Attempting to swap this 2018-2021 transmission (4.444 final drive) into a 2015-2017 vehicle (4.111 final drive) without changing the rear differential, which will destroy the center differential.
- Using the Wrong Drain Tool: Attempting to remove the transmission drain plug with an Allen key or T60 Torx instead of the mandatory T70 Torx bit, stripping the plug.
- Reusing the Old Clutch Kit or Throwout Bearing: Reusing worn components to save money, leading to premature failure and repeating the entire labor job.
- Buying a WRX Transmission for an STI: Confusing the TY75 series WRX transmission with the heavy-duty TY85 series STI transmission.
Not issues with the units on this page — the manufacturer documented these for every transmission of this family, wherever you buy one. Handy for your installer:
🔎 Recommended at install: Install a brand-new, updated OEM backup light switch before installing the transmission.
🔎 Recommended at install: Reprogram/reflash the Engine Control Module (ECM) diagnostic logic at a dealership.
🔎 Recommended at install: Replace the throwout bearing with the updated, heat-resistant OEM part (p/n 30502AA160) during installation.
🔎 Recommended at install: Upgrade clutch system components to improve durability under high-temperature or severe driving conditions.
🔎 Recommended at install: This is a factory engine tuning characteristic, not a mechanical failure.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-11033-5532334). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
2018-2021 Subaru WRX TY751VB6CA 6-Speed Manual: Problems, Identification, and Used Replacement
Identifying the TY751VB6CA transmission, common synchro and bearing failures, and when to swap in a used OEM replacement unit.
Read Full Guide →Related Trouble Codes (OBD-II)
2 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
Subaru: 32000AK540, TY751VB6CA
Other: 78100-TK8-A711-M1
Fits Years: 2018 2019 2020 2021
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This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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