Pros and Cons of a Transmission Flush

What is a Transmission Flush and Why Should I Get One?

A car’s transmission converts the power released by its engine to the vehicle’s wheels. The transmission consists of gears, a bell housing and filter. Transmission fluid is used to lubricate these parts. It cools the transmission and helps transfer the engine’s power to the transmission. You must check your transmission fluid twice a year or more often to prevent damage to the transmission and keep your car shifting properly. If you are having trouble shifting gears or your vehicle surges or stalls after being put in gear, you may need to get a transmission flush.

A transmission flush is performed by an auto mechanic to clean a transmission of old fluid and pump in new fluid. It removes debris from the cooler, cooler lines and converters. A mechanic attaches a special machine to your car’s pump intake. After the flush, your mechanic will look in the pan for bits of metal and other problems and replace the transmission filter.

As the flush progresses, fresh fluid enters the pump intake and old fluid is dropped into a tray. When this type of transmission flush is over, the mechanic replaces the pan and installs a new filter. The transmission now has new fluid, with any dirty fluid dumped in the collection tray.

A transmission flush is more complicated than a fluid drain. When performing a fluid drain, your mechanic will remove a drain plug from the transmission and let used fluid drip into the pan. While this procedure removes most of the old fluid, it doesn’t thoroughly clean the transmission. It is less expensive than a flush and there’s little potential for damage to your transmission. Some old fluid may remain in the transmission and combine with the replacement fluid, making it less effective.

Drawbacks to a Transmission Flush

Some auto experts believe a transmission flush can damage seals and valves in the transmission. Cleaning solutions are flushed through the transmission by a high-pressure machine through the engine and transmission. While this type of service can prolong the life of your transmission, it’s important to consult your vehicle’s owner’s manual and follow instructions pertaining to transmission maintenance. Many manufacturers recommend you bring your car in for a transmission flush every 30,000- 100,000 miles. Bringing it in more often may damage the valves or other parts of the transmission. Some manufacturers warn against performing a transmission flush on vehicles with excessive mileage. If you are considering a transmission flush, always have a professional mechanic inspect your car before committing to the service.

Bring your vehicle to our ASE certified technicians at LD Automotive. We perform routine oil changes to keep your engine in peak condition, transmission flushes and fluid drains. Oil and fluid are the lifeblood of your car, and we can help you maintain it, preventing costly transmission and engine damage. Schedule an appointment at our Frisco location by calling 469-629-7323 or using our online form.

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