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Our expert insights into automatic transmission fluid flush & replacement
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.
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
What happens when we do automatic transmission fluid flush and replacement?
The gearbox drain plug will be removed, or a syphon pump inserted down the filler tube.
The old fluid will be removed and replaced with new fresh transmission fluid.
Once refilled to the correct level and run through its selection routine, the vehicle will be test driven before returning it to the owner.
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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.
Mini
Mini is a British automotive marque that has been owned by the German multinational vehicle manufacturer BMW since 2000.
The Mini brand was originally introduced in 1969 when the vehicle model became a marque in its own right, breaking away from the Austin and Morris brands under the British Leyland umbrella.
How popular is Mini in the United Kingdom?
The Mini Hatch was the 7th best selling car of 2018 in the UK. Mini is a consistent favourite among buyers with a leaning for British cultural icons and retro styling.
There are around 750k Mini cars on the roads, showing that the brand is still as popular as ever due to their compact sizing, attractive styling and its reputation as a classy and classic small car.
Mini: a premium product of British motoring
With its unique and unmistakable styling, Mini is firmly placed as a premium product. Its ownership by BMW has added advantages in production, by being able to lean on the executive luxury German marque for many of the advanced technological systems and specialist industry knowledge used in their manufacture.
A piece of British culture and a Hollywood star
Enhancing its popularity as a household name, the original British Mini became a star of the silver screen when it appeared predominantly in the gold-heist movie ‘The Italian Job’ in 1969, starring Michael Caine and Noel Coward. With a remake hitting the screens in 2003, the new Mini was called on to star once again, and a selection of Mini hatch models continued the tradition by featuring in the film.
Mini: a new competitor to the most popular 3-door hatchbacks
Despite its small footprint, the Mini hatch is providing real competition to the Audi A1 and VW Polo due to its premium quality build. And with the weight of BMW behind them, it’s easy to see why.
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
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