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Old 04-08-2018, 04:38 PM
aleks001 aleks001 is offline
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Transmission Adaptation reset and why you should do it

Hi All,

I just wanted to clear something up with these cars, as there is currently a lot of confussion about whether one should or shouldn't perform transmission adaptation resets. There is also currently a document circulating about how you should definetly not do this unless you will take the car on an extended drive where you stop, go , drive fast then slow down etc basically needing like 10 km of straight road that no one has.

First of all I don't know where this document has started from but it seems to be getting more and more acceptance that it is a requirement to perform. I suggest you absolutely do not do it for three reasons.

1. 99% of people do not have this much of straight road and you could be putting yourself in danger by trying it on public roads.
2. You are teaching the transmissionto adapt incorrectly for your driving style as this is not how you will normally be driving.
3. This is not mentioned officially by BMW, ZF or GM anywhere. Do you really think this is what dealerships do when they reset adaptations.

This is the article I'm talking about and there are more and more people jumping on this band wagon with absolutely no proof of it's benefits apart from reading it on forums.

https://blog.fcpeuro.com/how-to-rese...daptations-zf6

This article is absolute rubbish and is literally based on nothing. The only thing that is true here is that BMW recommends doing an adaptation reset when you change mechanical parts in the transmission. Everything else is just internet garbage.

The second point I want to cover is whether you should or shouldn't do a reset and will it cause damage or ruin your shifts and also when you should do it. First of all you can reset the adaptations all you like it will not cause any damage or ruin any shifting. However, if you are currently happy with how your car shifts then don't touch it, because it could learn to shift differently to what you are use to.

If however you are having weird transmission issues like the 2-1 rough downshift. The car downshifting to early, or hard gear changes. Then you should 100% do a reset. Before you do the reset though, get your transmission fluid changed, make sure you drop the pan as this will release another quart at least. Then perform the reset. Now drive your car as you normally would, don't do anything you don't do normally as you want your transmission to adapt to your regular driving style.

The second point I want to bring up is that there is no way to reset the transmission adaptations without software and a cable. All these internet methods of pedal down to the floor etc are absolute rubbish. You have to 100% use software and a cable to the car. INPA is the easiest and cheapest route.

Finally here is a video explaining the importance of transmission adaptations in modern automatics.



The software plays a huge roll in the performance of modern transmissions. I had so many issues and all were sorted after finally doing a transmission adaptation reset. You should always replace the fluid first though so your transmission can adapt to the newer fluid properties. My car now at 220,000 Km's no shifts better then ever and nothing has been replaced in the transmission. If your problem returns after you have done the above then you have a mechanical problem and need to start thinking about about the solenoids and valve body if you don't have any warning lights.

I know this is a bit of a rant, but I'm so sick of the bull crap information on the internet and people spending crazy money replacing parts that they don't need to. Hope this article helps someone looking for this information and saves them some serious money. Don't be scared to reset your adaptations people, dealerships do it all the time and the older your car gets the more likely it will need one.
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Old 04-08-2018, 08:41 PM
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AlphaBetaX5 AlphaBetaX5 is offline
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Very well said!
Agreed! Change fluid, reset adaptations by a software and cable. And drive your normal driving!




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Old 04-09-2018, 03:41 AM
smassey321 smassey321 is offline
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Attached is the official ZF doc on the subject. It appears to be the source of the link you posted. I agree dealers probably don't do this.
Attached Files
File Type: pdf ZF_Adaptation procedure.pdf (176.8 KB, 182 views)
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Old 04-09-2018, 04:37 AM
aleks001 aleks001 is offline
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There is no context for that document and god knows what its original purpose is. And no dealer would do it because it would be impossible to do. I did it late at night and it didnt help. Now that ive reset it and drove it normally its much better. Good find on the document though. Would make sense that this is where it came from. Remeber though that software in these transmissions has changed alot from the factory zf unit. Thats why you can get a jaguar with the same transmission yet it shifts completely differently. You could potentially in fact be confusing whatever code BMW has put in the transmission.
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Old 04-09-2018, 05:30 AM
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Quote:
Originally Posted by aleks001 View Post
Remember though that software in these transmissions has changed a lot from the factory ZF unit. Thats why you can get a jaguar with the same transmission yet it shifts completely differently. You could potentially in fact be confusing whatever code BMW has put in the transmission.
AFAIK, ZF does not supply a transmission with "generic" programming that is later replaced by the vehicle manufacturer. ZF develops the transmission logic according to each manufacturer's specifications in partnership with their engineers. A "factory ZF unit" supplied to BMW is already programmed for a BMW. The ZF technical manual excerpt smassey posted states right at the top that the procedures are specific to the four software versions supplied to BMW. You're not going to "confuse" the transmission by following the procedure outlined for the correct software version.

That said, you're right that most any dealer or transmission shop would be pretty likely to ignore these procedures because they probably couldn't follow them safely without a police escort. I'm all but certain that of the dozen or more BMW dealerships in NJ, there is not one where a tech could complete the most complex drive pattern without being interrupted by a stop sign or a busy, signal-controlled intersection.
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Last edited by Zeichen311; 04-09-2018 at 07:34 AM.
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Old 04-09-2018, 05:45 AM
aleks001 aleks001 is offline
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Good to know. Thanks for clearing that up. I always wondered where in the supply chain this happened.

Unless you live somewhere way out of town no one would be able to complete this procedure. I had a pretty good go at it ended up about 15 km's from home in some bushy place lol but i found later that just driving the car normally made the transmission shift better than following the procedure. Because i can only assume it adapted to my most common type of driving
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Old 04-09-2018, 07:51 AM
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Originally Posted by aleks001 View Post
Good to know. Thanks for clearing that up. I always wondered where in the supply chain this happened.
Reviewing what I wrote, I should note I am not 100% certain who actually loads the software into the unit--it could be done at ZF before delivery, at BMW after the transmission is installed, or even both depending on whether it's for initial assembly or a replacement. Plus there's the possibility of field updates to later revisions, too. Point being, though, that development of the software is a partnership and ZF is not in the dark about what goes on inside their transmissions, no matter the application.
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Last edited by Zeichen311; 04-09-2018 at 07:53 AM.
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