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10 Signs You Need a Automatic Transmission Flush

10 Signs You Need a Automatic Transmission Flush


Your vehicle’s transmission is a critical component that ensures your car runs smoothly. It’s responsible for shifting gears and transferring power from the engine to the wheels.

To keep your transmission in optimal condition, regular maintenance is essential. One important aspect of this maintenance is changing or flushing the transmission fluid.

In this article, we’ll discuss signs that indicate it might be time for an automatic transmission flush.

1. Dirty or Burnt Fluid

One of the most obvious signs that your transmission needs attention is the condition of the fluid itself. Check the transmission fluid dipstick, and if you find that the fluid is dark brown or black and has a burnt odor, it’s time for a flush. Healthy transmission fluid should typically be red or pink and have a sweet, oily smell.

2. Slipping Gears

If you notice that your vehicle is slipping between gears or has trouble staying in gear, it could be due to degraded or contaminated transmission fluid. An automatic transmission flush can help resolve this issue by providing your transmission with fresh fluid.

3. Rough Shifting

Rough shifting is another common symptom of transmission problems. If your vehicle shifts gears roughly, hesitates before shifting, or jerks during shifts, it’s time to consider a transmission flush. Fresh fluid can often alleviate these issues and improve shifting performance.

4. Unusual Noises

Strange noises such as whining, clunking, or grinding when your vehicle shifts gears can be indicative of transmission problems. While these noises could be caused by various issues, changing the transmission fluid through a flush may help reduce or eliminate them.

5. Overheating

Overheating can cause significant damage to your transmission. If you notice that your transmission is running too hot, it may be due to old or contaminated fluid. A flush can help maintain proper operating temperatures and prevent overheating.

6. Leaking Transmission Fluid

Transmission fluid leaks should never be ignored. If you see red or pink fluid spots under your parked vehicle, you likely have a transmission fluid leak. It’s essential to fix the leak, but even if you do, a transmission flush may still be necessary if the fluid has been compromised.

7. High Mileage

As a general rule of thumb, it’s advisable to have your transmission fluid flushed every 30,000 to 60,000 miles. Check your vehicle’s owner’s manual for manufacturer-specific recommendations. If your vehicle has reached or exceeded this mileage and you haven’t had a transmission flush, it’s time to consider one.

8. Transmission Warning Light

If your vehicle’s “check engine” light or a specific transmission warning light on your dashboard comes on, it’s crucial to have your vehicle’s diagnostics checked. This warning could be related to transmission issues that may be resolved with a flush.

9. Decreased Fuel Efficiency

A poorly functioning transmission can lead to decreased fuel efficiency. If you notice a sudden drop in gas mileage, it could be due to transmission problems. A flush may help improve fuel efficiency by ensuring your transmission operates efficiently.

10. Scheduled Maintenance

Following the manufacturer’s recommended maintenance schedule is key to keeping your vehicle in top shape. If your maintenance schedule suggests a transmission flush at a certain mileage interval, be sure to adhere to these guidelines.


Regular maintenance, including changing or flushing your transmission fluid, can extend the life of your vehicle’s transmission and help prevent costly repairs in the future.

If you experience any of these signs or are unsure about the condition of your transmission fluid, consult with a qualified mechanic or your vehicle’s manufacturer for guidance on when to perform an automatic transmission flush.

By staying proactive about your transmission’s health, you can enjoy a smoother, more reliable driving experience.

Discover More:

Should I Get a Transmission Flush? Reasons to Get A Transmission Flush


5 Causes of Transmission Fluid Leaks and Repair Cost
How To Find When Your Car Needs A Transmission Flush


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