Should you flush a Subaru CVT transmission?
As the owner of Kevin's Autos, I often get asked about the maintenance of various vehicle components, particularly the continuously variable transmission (CVT) found in many Subaru models. Flushing a CVT transmission is a topic that generates a lot of debate among car enthusiasts and mechanics alike. In this article, we'll explore the reasons for and against flushing a Subaru CVT transmission, helping you make an informed decision for your vehicle.
Understanding Subaru CVT Transmissions
Subaru's CVT transmissions are designed to provide smooth acceleration and improved fuel efficiency. Unlike traditional automatic transmissions, CVTs use a system of pulleys and belts to provide an infinite number of gear ratios. This unique design requires specific maintenance practices to ensure longevity and optimal performance.
Reasons to Consider Flushing Your CVT Transmission
Flushing the CVT transmission can be beneficial in certain situations. Here are some reasons why you might consider it:
- Fluid Contamination: Over time, transmission fluid can become contaminated with debris and metal shavings, which can lead to poor performance and potential damage.
- Overheating: If the transmission fluid has degraded due to excessive heat, a flush can help restore its properties and prevent overheating issues.
- Maintenance Schedule: Following the manufacturer's recommended maintenance schedule can help prolong the life of your transmission. If a flush is recommended, it’s wise to follow through.
Reasons Against Flushing Your CVT Transmission
While there are benefits to flushing, there are also valid concerns. Here are some reasons why you might want to avoid it:
- Risk of Damage: Flushing can dislodge debris that may clog filters or cause damage to sensitive components within the CVT.
- Manufacturer Recommendations: Some manufacturers, including Subaru, may not recommend flushing as part of routine maintenance. Instead, they may suggest simply replacing the fluid at specified intervals.
- Cost Considerations: Flushing can be more expensive than a simple fluid change, and if not necessary, it may not be a cost-effective choice.
Conclusion
Ultimately, whether to flush your Subaru CVT transmission depends on the specific condition of your vehicle and the recommendations of your mechanic. If you're experiencing issues or if your transmission fluid is due for a change, consult with a trusted auto service provider like Kevin's Autos to determine the best course of action. Regular maintenance is key to keeping your Subaru running smoothly, and understanding your transmission's needs is an essential part of that process.
Frequently Asked Questions
How to care for a Subaru CVT transmission?
The only regularly scheduled maintenance a Subaru CVT transmission requires routinely is an inspection of the fluid.
What years did Subaru have CVT problems?
The models and years that were affected mainly by transmission issues are:
- Crosstrek, 2013 – 2015.
- Crosstrek Hybrid, 2014 – 2015.
- Forester (2.0 and 2.5 liter engines), 2014 – 2015.
- Impreza, 2012 – 2015.
- Legacy, 2010 – 2015.
- Legacy 3.6L V6, 2015.
- Outback, 2010 – 2015.
- Outback 3.6L V6, 2015.
Does Subaru CVT transmission fluid need to be changed?
Follow Subaru's Recommendations
Subaru often suggests changing the transmission fluid at regular intervals, such as every 30,000 to 60,000 miles, depending on the model and transmission type.
Can a CVT transmission last 300000 miles?
Despite their durability, Honda CVTs can encounter issues; however, with proper care, they can help owners exceed 300,000 miles on their vehicles.
How do I know if my CVT transmission fluid needs replacing?
Other than the dreaded check engine light, if you observe delayed shifting, poor acceleration, slipping gears, or transmission whine, then you should consider having your transmission fluid changed or maybe even flushed.
How much should a CVT flush cost?
On average, you can expect to pay between $350 to $400 for a CVT fluid change in the United States. This price range takes into account various factors such as the type of vehicle, location, and the specific dealership or service center you choose.
What is the downside of transmission flush?
This is because excess build-up from contaminants and debris solidify and form a sludge. If too much sludge builds up in your transmission, and a transmission flush is performed, new fluid can cause stubborn sludge to loosen and cause damage to your transmission.
What happens if CVT fluid is not changed?
Apart from overheating, old transmission fluid can lead to a buildup of sludge and debris that creates clogs. This not only further reduces the efficiency of the transmission but can lead to erratic shifting, delayed gear engagement, and in severe cases, total transmission failure.
How long will a CVT transmission last in a Subaru?
There is a fair chance your Subaru CVT will last well beyond 60,000 miles as long as you stick to the factory-recommended maintenance schedule and take care not to overfill your transmission fluid.
Is it good to flush a CVT transmission?
A CVT doesn't need to be flushed like a traditional automatic transmission. It's essentially a chain in a oil bath. It doesn't contain all the passageways, gears, drums, bands, servos, etc that contamination can accumulate & need to be flushed from.
