Continuously Variable Transmissions (CVTs) are becoming increasingly popular in modern vehicles due to their smooth operation and fuel efficiency. However, maintaining a CVT requires regular fluid checks and changes. Unlike traditional automatic transmissions, checking CVT fluid levels can be a bit more complex, especially when considering whether to check it while the engine is running or stationary.
Understanding the Difference
The key difference between checking CVT fluid while the engine is running versus stationary lies in the fluid’s temperature and pressure.
Running Engine
With the engine running, the CVT fluid is heated and pressurized, mimicking its operating conditions. This allows for a more accurate reading of the fluid level, as it reflects the actual amount of fluid circulating within the transmission.
Stationary Engine
When the engine is off, the fluid cools down and the pressure drops. This can lead to an inaccurate reading, as the fluid may have settled in the sump, making the level appear lower than it actually is.
Checking CVT Fluid⁚ The Right Way
While there are advantages to both methods, the most accurate and recommended way to check CVT fluid levels is with the engine running and at operating temperature. Here’s how⁚
- Warm up the engine⁚ Drive your vehicle for 10-15 minutes to ensure the fluid reaches operating temperature. This is crucial for an accurate reading.
- Park on a level surface⁚ Ensure your car is parked on a flat surface to avoid inaccurate readings due to fluid tilting.
- Locate the dipstick⁚ The dipstick is usually located near the transmission case, marked with “CVT” or “Transmission Fluid”.
- Pull out the dipstick and wipe it clean⁚ Use a clean cloth to wipe away any old fluid residue on the dipstick.
- Reinsert the dipstick completely⁚ Make sure the dipstick is fully seated back into the dipstick tube.
- Remove the dipstick and check the fluid level⁚ The fluid level should be within the “Full” markings on the dipstick.
- Top off if necessary⁚ If the fluid level is below the “Full” mark, add the correct CVT fluid to the designated fill point. Consult your owner’s manual for the recommended fluid type.
Cautionary Notes
- Never check CVT fluid while the engine is running if the vehicle is not equipped with a dipstick that specifically allows for this.
- If you’re unsure about checking CVT fluid levels, consult your vehicle’s owner’s manual or a qualified mechanic.
- Regularly checking and maintaining CVT fluid levels is crucial for proper transmission operation and longevity.
By following these steps, you can ensure that your CVT fluid is at the appropriate level, promoting optimal performance and extending the lifespan of your transmission.