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Whitepaper
Basics, legislation and expert knowledge. Oil changes on automatic transmissions.
All information about changing the transmission oil
Regular oil changes for automatic transmissions are worthwhile: owners maintain the function and longevity of their vehicle. And garages can offer their customers a particularly valuable service.
Our white paper will turn you into a maintenance professional: you can expect concentrated expert knowledge on all aspects of automatic transmissions and oil changes - clearly presented and supplemented with important legal aspects and interesting sample calculations. Download now!
Automatic Transmission Fluid Change: Intervals and Procedure
An automatic transmission stands for comfort and durability. But it will only remain reliable if the transmission fluid is changed regularly. Many drivers underestimate the importance of a fluid change in automatic transmissions. Those who follow the recommended intervals protect themselves against expensive damage and maintain shift quality. In this guide, you will learn when a transmission fluid change is necessary and what the process looks like.
Why is an automatic transmission fluid change important?
Transmission fluid plays a key role in automatic transmissions. It lubricates gears, clutches, and discs, transmits hydraulic pressure, cools components, and removes debris. Over time, the fluid loses its effectiveness. Deposits, heat, and aging processes degrade the lubricant. The result: the transmission shifts imprecisely, jerks, or responds with delay. In the worst case, expensive damage may occur.
Benefits of regular fluid changes
A timely fluid change for the automatic transmission brings clear benefits. The transmission operates more quietly and precisely. The lifespan increases significantly. Following the recommended intervals saves considerable repair costs in the long run. The resale value of the vehicle also benefits from proper maintenance. Risks of missing a fluid change If the fluid is not replaced, serious consequences threaten. The oil ages, losing its lubricating and cooling properties, which over time may lead to transmission damage. Metal abrasion and dirt particles accumulate. Shifting becomes inaccurate, the transmission may overheat. In the worst case, key components like clutches may fail. Repairs can quickly cost several thousand euros.
When and how often should transmission fluid be changed?
An automatic transmission should have its fluid changed at the latest every 80,000 to 120,000 km or – as most manufacturers recommend – after around three to five years. Transmission fluid ages with time, losing lubrication and cooling properties, which increases the risk of damage. Always follow the manufacturer's guidelines.
Manufacturer recommendations and intervals
Most manufacturers recommend a transmission fluid change at the latest every 80,000 to 120,000 km or after three to five years. The exact intervals can be obtained from your vehicle manufacturer. Drivers who often drive in city traffic, tow trailers, or operate in extreme conditions should consider changing earlier.
Signs that indicate a necessary fluid change
Certain symptoms point toward a necessary fluid change: jerky shifting, delayed response, unusual noises, or increased fuel consumption. A dark, burnt-smelling oil film on the dipstick (especially with older vehicles such as specific Mercedes-Benz models) is also a warning sign.
Process: How a professional workshop performs an automatic transmission fluid change
Step-by-step guide:
Lift and secure the vehicle.
Drain or extract the transmission fluid.
If necessary: remove the oil pan, replace filter and gasket.
Clean and reinstall the oil pan. Fill in new transmission fluid.
Check fluid level with engine running and at the specified operating temperature; top up if necessary.
Test drive and final inspection.
Transmission flush vs. simple fluid change
During a flush, the entire system is cleaned with special equipment. This way, debris is removed from lines and coolers as well. A simple fluid change only replaces the oil in the pan. Flushing is more thorough but also more expensive.
Which products should be used?
Always use manufacturer-approved automatic transmission fluid (ATF). Incorrect oil may cause severe damage. Filters and gaskets should only be used in OEM quality.
Why you shouldn’t do it yourself
An improper transmission fluid change may damage the system. It is better to leave the procedure to a professional workshop. Workshops also ensure the exact oil quantity and proper venting of the system.
Requirements and tools
For an automatic transmission fluid change, a lift or pit, suitable tools, the correct fluid, a new filter, and gaskets are required. Technical expertise is essential.
Frequently asked questions (FAQ)
How much transmission fluid does my car need?
This depends on the vehicle and transmission type. In most automatic transmissions, between 5 and 12 liters are required. Precise information can be found in the vehicle documentation or the clear overview poster from MEYLE.
When should a transmission flush be performed?
A flush makes sense if a normal fluid change is no longer sufficient, e.g., if the fluid is heavily contaminated or worn. It is especially recommended in cases of shifting problems or high mileage. An individual assessment is recommended beforehand.
What happens if the fluid is not replaced?
The oil ages, loses its lubricating and cooling properties, and may cause transmission damage. Costly repairs may follow.
What are the benefits of regular fluid changes?
The transmission operates more precisely, quietly, and lasts longer. Over time, a regular change saves expensive repairs.
When should DSG transmission oil be changed?
For dual-clutch transmissions (DSG), the oil should be replaced every 60,000 to 120,000 km depending on the model. This is particularly important for wet clutches to prevent deposits and damage. Manufacturer instructions are binding.
How long does an automatic transmission last?
A well-maintained automatic transmission can easily last over 250,000 km – some vehicles even exceed 500,000 km. Regular oil changes and the correct ATF are crucial. Neglect usually leads to premature wear.
Conclusion
An automatic transmission should have its fluid replaced every 80,000 to 120,000 km or after about three to five years. Over time, transmission fluid loses lubricating and cooling capacity, which may lead to significant damage. Manufacturer instructions must always be followed. The costs for a fluid change consist of labor, oil, filter, and small parts. Regular maintenance saves costly repairs in the long run.
