Mmmm, 
If I put the parking brake on (P), or the main handbrake, the display doesnāt show D1 any more .
I have to select D again to pull off .
Thanks all for contributing to this post.
I knew I could feel it disengaging when brake pedal Is pressed when stopped.
It went back into the dealership who have reset the learned behavioursā and it does seem to be better now.
Thanks
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In my opinion, the mileage is too low to require a calibration reset. A computer isnāt a solution to fix the problem. Iād keep looking.
BTW, at that mileage, the transmission fluid should be changed for the first time.
Hello everyone,
Iām from Argentina. I joined the forum recently and I havenāt introduced myself properly yet, so hello to all.
I recently bought ( 1 month ago) a DS 4 Ćtoile 215, 1.6 THP with the EAT8, model year 2025. The car currently has 21,500 km, which is around 13,360 miles, and it was from my uncle (I know the history of the car and all services were in official workshops).
Iāve noticed an issue a couple of times, mainly when selecting Reverse. It usually happens after driving for a longer distance, around 50ā70 km / 31ā43 miles, when the car is already warm.
For example, when I stop to park, I put the gearbox in N, then select R. Most of the time I can feel reverse engage and the car moves normally. However, sometimes I release the brake and the car does not move immediately. Then, after a short delay, it engages suddenly and gives a noticeable jerk/thump.
It does not happen every time. On shorter drives, around 15ā20 km / 9ā12 miles or less, the gearbox usually goes from D to R without any issue, and I donāt really feel any harsh engagement.
I also noticed something similar to what @LDR08 described: sometimes, when Iām stopped at a traffic light for more than 30ā60 seconds, I release the brake and the car takes about 1 or 2 seconds to start moving, without pressing the accelerator. Other times, it starts moving instantly as expected. This does not happen very often, but I noticed it now after reading the main post.
Another thing Iāve noticed is that the gearbox can sometimes behave a bit strangely when slowing down for a speed bump. It seems to downshift to 2nd, then briefly select 1st, and almost immediately shift back to 2nd again. You can actually feel the gear change, almost as if the gearbox is unsure which gear to use at that moment.
The car is still under warranty, so I can take it to the dealer. However, official workshops here in Argentina are not always the best, so before doing that I wanted to ask if this sounds like something that definitely needs to be checked, or if it could be considered normal EAT8 behaviour under certain conditions.
Has anyone experienced something similar with the EAT8 gearbox? Could this be related to gearbox adaptation, software, oil temperature, or something mechanical?
Thanks in advance for any advice.
If you are standing at this moment slightly uphill, this is normal - this is called Hill Holder
This may be related to the vehicleās angel position. Driving uphill shifts the gear to a lower gear. Driving downhill shifts the gear to a higher gear. When it happens quickly, the gearbox doesnāt know what to do.
As for shifting gears from D to R, do it stronger with a double click to skip N. The N position is not needed because at this point you lose pressure in the gearbox. Then observe.
Hi,
I was informed that the gearbox learns and adapts to your diving style. With the cars being used it will go off the previous owners driving style.
The main dealership reset the logic on my gearbox and it has been fine ever since, occasionally there is a slight clunk but I that is usually when the gearbox is trying to anticipate something .ie. When slowing down so the gearbox starts to change to a lower gear but if you then try to accelerate quickly it confuses the box, Iāve had this on my DCT ford before as well.
With any of these automatic systems you need to learn its uniqueness too. I have been told these boxes are pretty solid.
If youāre concerned, you get the box diagnosed to see if there is any fault codes.
Does the box feel good under normal driving conditions? Can you cycle through the gears OK?
Hi @Andrew_PL, thanks for your reply.
Yes, I had read something about the Hill Holder function, and it makes sense. I do notice that behaviour sometimes when Iām entering my garage and I stop on a slight uphill slope while waiting for the gate to open.
However, in the case of the traffic light, it usually happens on a flat road. That said, it does not happen often, so maybe I am just overthinking it or paying more attention to it now after reading the other posts.
Regarding the vehicleās angel position, what you said also makes sense. I had not thought about it that way. This is my first automatic car, as I have always driven manual cars before, and here in Argentina we have a lot of speed bumps. So maybe I am just not fully used to how the gearbox reacts in those situations yet.
As for shifting from D to R, I normally used to do it directly, without stopping in N. When the car is cold, or after only a short drive, it works perfectly: no jerk, no thump, and nothing strange.
The first time I felt that jerk/thump when selecting Reverse (after a 60 km drive, parking in a mall), I actually thought I had hit something. Then I moved forward, selected Reverse again, and it happened again. After that, I started passing through N before selecting R, and that seemed to make the engagement softer, although sometimes it still happens.
I would say it mainly happens when I come off the highway and try to park shortly after, without having driven slowly in city traffic for a while.
Apart from that, I have not noticed anything strange with the other gear changes. Upshifts and downshifts in Normal, Eco, Sport and Manual mode all feel quick and smooth.
The only exception is the shift from 1st to 2nd during the first few meters when the car is completely cold, especially now in winter, with temperatures around 8Ā°C . But I assume that could be normal until the gearbox warms up a bit.
Hi @LDR08, thanks for your reply.
That is very useful to know. I did not about that and also I did not know that the dealer could reset the gearbox logic/adaptations. I will definitely keep that in mind, especially as the car was used before I bought it, so it may still be adapted to the previous ownerās driving style.
Regarding normal driving, yes, the gearbox feels good overall. Upshifts and downshifts in Normal, Eco, Sport and Manual mode are quick and smooth, and I can cycle through the gears without any problem.
The only exception I notice is sometimes from 1st to 2nd during the first few meters when the car is completely cold, especially now in winter with temperatures around 8Ā°C, but I assume that could be normal until the gearbox warms up a bit.
Iāll try to find some time to take it to the dealer/workshop and ask them to connect it to diagnostics, just to check if there are any fault codes. I may also ask them about resetting the gearbox adaptations and letting it relearn my driving style.
Thanks again for the advice.