How many quarts does a Subaru CVT transmission take?
Most Subaru CVTs (Lineartronic) require about 9 quarts of CVT fluid for a full system fill, while a pan drain and refill typically moves roughly 3–5 quarts. Exact capacity varies by model, year, and the service method used, so always verify with the owner's manual or service data for your specific vehicle.
Understanding CVT capacity in Subaru
Subaru’s CVTs use a dedicated CVT fluid (CVTF) and the total capacity depends on how completely the system is serviced. Some models are filled through a full replacement that includes the torque converter, while others are serviced with a drain-and-fill procedure that only partially replaces the old fluid. The correct fluid specification and capacity can vary slightly by year and model.
Factors that affect capacity
Several factors determine how much CVTF a Subaru CVT holds or needs during service:
- Model year and transmission variant (full-range CVT vs. later revisions)
- Whether a full system replacement or a partial drain-and-fill is performed
- Whether the torque converter is drained or not during service
- Exact service procedure outlined in the manufacturer’s manual
Understanding these factors helps ensure you source the right quantity and avoid under- or over-filling the transmission.
Typical capacities and service methods
Below are common figures you’ll encounter when servicing Subaru CVTs. These numbers are general guidelines and should be confirmed for your specific model/year.
- Full system refill (drain pan plus torque converter drained, if applicable): about 9 to 10 quarts
- Partial drain and fill (pan drain only): roughly 3 to 5 quarts
- Full flush (dedicated equipment replacing nearly all CVTF): typically 9 to 10 quarts or more, depending on the system
Conclusion: For a complete replacement, plan on roughly 9–10 quarts of CVTF; for a partial drain and fill, expect to add about 3–5 quarts, with variations by model-year.
Model-specific notes
CVT fluid capacity can vary by Subaru model and year. The figures below reflect common guidance for many models that use the Lineartronic CVT.
- 2010–2023 models such as Outback, Forester, Impreza, Legacy, and Crosstrek with Lineartronic CVTs typically have a total capacity around 9.0–9.5 quarts
- Some early-generation CVTs may be closer to 8.5–9.0 quarts
- Always confirm with the exact service manual or VIN-specific data for your vehicle
Conclusion: While 9–9.5 quarts is a common target for many Subarus, exact numbers can differ by model and year; always verify with official factory specifications for your car.
How to check and maintain CVT fluid
Maintaining the correct CVTF level and using the specified fluid is essential for Subaru CVTs. The procedure and dipstick availability can vary by model year, so follow the manual for your vehicle.
- Use only the recommended CVTF specified by Subaru (often Subaru CVTF or an equivalent meeting JWS 3309 or Subaru’s own specification)
- Check fluid level at the prescribed operating temperature and vehicle conditions as outlined in the manual
- If performing a fill, ensure the vehicle is on a level surface and follow exact drain/fill steps per the service data
- Avoid mixing fluids; incompatible CVTFs can cause shifting issues or damage
Conclusion: Accurate fluid type, correct fill quantity, and adherence to the service procedure are key to reliable CVT operation.
Summary
In most Subaru CVTs, a full replacement requires about 9–10 quarts of CVTF, while a partial drain-and-fill uses roughly 3–5 quarts. Model year, transmission variant, and whether the torque converter is drained influence the exact amount. Always consult the specific service manual for your vehicle to confirm the correct capacity and procedure, and use the exact fluid specification Subaru calls for.
