What does Automatic Transmission Fluid (ATF) do?

Automatic Transmission Fluid (ATF) provides the lubrication to the moving parts, wear and corrosion protection and is there to transfer the mechanical power of the automatic transmission. This is why regular servicing of an automatic transmission is vital to change this fluid (and its filter where fitted) in line with manufacturers recommendation. Failure to do this can result in many issues, such as transmission overheat, solenoid failure, jerky gear changes and even total gearbox failure.

What is an Automatic Transmission Fluid Flush?

A transmission fluid flush is a process in which the fluid in an automatic transmission is flushed out of the transmission (gearbox) and replaced with new Automatic Transmission Fluid (AFT). The flushing process, when done correctly, replaces nearly 100% of the old fluid with new fluid, including fluid in the torque converter and oil cooler lines.

Porsche

Porsche AG is a German automobile manufacturer, established over 88 years ago in 1931, and is renowned for producing high-performance sports cars, SUVs and saloon cars.

Porsche is owned by Volkswagen AG and carries a total equity of over €10billion (according to 2015 figures).

How popular is Porsche in the United Kingdom?

Who wouldn’t want a Porsche? Porsche has been setting standards in high-performance sports vehicles for as long as they’ve been in the industry.

There are currently around 146k Porsche vehicles on the roads in the UK, showing a steady rise in numbers over the past 10 years.

Luxury, high-end performance sports cars

With a back catalogue of historic models too numerous to mention, the current range provides typical 2-seat mid-engine sports cars in the Porsche 718 and Porsche 911 models, luxury touring in the Panamera 4-seat full-size saloon and a luxurious level of crossover driving in the Cayenne and Macan SUVs.

Sporting a selection of SUV models

Given the popularity of the SUV in modern driving, it was only a matter of time until the high-end marques got involved in revving up the performance and presentation.

For example, the Cayenne Turbo can accelerate from 0–62mph in 4.1 seconds with a top speed of 177mph. The hybrid electric model is equally as impressive with figures of 5.0 seconds and 157mph. That should take care of the school run in record time.

Porsche electric: the plug-in hybrid range

In 2010, the both Porsche SUV models and the Porsche 918 were released as hybrid electric versions. Currently, only the Cayenne is available as an electric hybrid, but Porsche is building towards the release of their E-performance range: with the new Taycan all-electric sports car being developed through the Mission E Cross Turismo concept study.

How often should I have my automatic transmission fluid flushed?

Most manufacturers recommend replacing transmission fluid every 30,000 to 60,000 miles. If you tow anything, or do mostly city driving with more frequent changes of gears, it may be wise to change your ATF even more often.

What happens during an automatic transmission service?

There are many different processes required depending on the manufacturer, some of which may include all the following or just some:

• Mechanics will raise the vehicle and increase the gearbox temperature if required by the procedures.

• The gearbox drain plug will be removed, or a syphon pump inserted down the filler tube.

• If the vehicle has a filter, the sump is likely to be removed so the filter can be accessed.

• The parts will then be cleaned before a new filter is installed and the sump refitted with a new gasket or sealing compound.

• The gearbox will then be refilled with the correct ATF for the gearbox and application in accordance with the manufacturer's procedure.

• In some cases the refilling operation requires diagnostic input as well as manual.

• Once refilled to the correct level and run through its selection routine, the vehicle will be test driven before returning it to the owner.

What are the symptoms of requiring an Automatic Transmission Fluid Flush & replacement?

Usually, there a few signs you can look for:

• Transmission grinding or strange noises

• Problems changing or selecting Gears

• Slipping gears

• Failure to change up or down smoothly

• Jolts or a delay as you change from Park to Drive

• Transmission overheat warnings

• Transmission Control Unit warning lights