Automatic gearbox fluid replacement

[KOOLCAR]

Greetings to everyone
I have performed an oil change on my 2016 Evoque 2-liter automatic gearbox. The car has a mileage of just 38,521 kilometres.
The gears were sometimes retaining too much tension. In the context of watching YouTube, I saw that no filter was updated, prompting my inquiry: Is there a filter that requires replacement?

I am enquiring since the oil was dark when I discarded it. It operated for three days, after which the oil was drained again and remained equally dark. Should I continue flushing to get clean oil in the gearbox?

I have heard that a gearbox pressure flush is possible, but according to my research, it may lead to complications.
All comments are welcome.

[WanderlustGuru]

A filter exists, but it is only accessible during a complete gearbox overhaul, since it is located deep inside, so it is not considered a service item.
Each time, you get less than half the required oil; it took me six sump dumps to restore mine to pink on the six-speed gearbox. I would recommend against a power flush.
A guy with a nine-speed bicycle claims he extracted an additional litre by elevating the front end during the emptying process.
Additionally, check whether it is possible to reset the oil degradation counter. I performed the procedure in the six-speed using my diagnostic instrument, which confirms the presence of fresh oil. Apologies, I have not completed the 9-speed, so I am rather uncertain.

[KOOLCAR]

It is intriguing; why implement a filter in an inaccessible location?
I will continue to replace the oil till it flows clean after one week.
The vehicle operates seamlessly with each oil change, suggesting that the previous owner likely neglected this maintenance task.
Thank you for your response.

[Black_raven]

It is not uncommon for gearbox oil to remain unchanged or for the filter to be inaccessible without disassembly. If concerned, install a magnetic drain plug or affix a rare earth magnet to the drain plug, which will magnetise it, therefore attracting swarf and tiny metal particles as they accumulate in the gearbox sump.

[Psychil]

Is there no gearbox oil pan to remove?

[Black_raven]

Negative, only a drain stopper. Ensure that the filler plug may be undone prior to removing the drain stopper.

[MDMH757]

Hello, I had a comprehensive gearbox flush on my prior BMW X3 at 130,000 miles, since it had not been performed before. The gearbox fluid extracted during the service performed by an independent technician was black, although it should have been pink. The garage said it was the most severe condition they had encountered...

A home flush is insufficient; it does not completely replace all of the fluid.I shall do a complete flush on my wife's RR when possible.

[Flexfer]

It required six sump dumps to get pink fluid. It is worthwhile, especially at the reasonable price of £120 for 20 litres of fluid and seals.

[MDMH757]

How did you verify that everything was removed from the torque converter? If it is feasible for me to do alone, I would certainly do it!

Is there a set of pan filters available?

[Flexfer]

Numerous videos on YouTube demonstrate the nine-speed technique. In contrast to the Mercedes, which has a torque converter drain plug, the process involves starting the engine between each change and cycling through the gears to homogenise the fluid, followed by draining and refilling, resulting in progressively less aged fluid with each iteration.