[lnxguy]

I've got an '09 I'll have to crawl under there and see what I've got bolted to the engine lol

[RBT-Tuning]

Hi guys,

it`s a little confusing, but I will try to sum it up:

6HP is available in 2 generations in the BMW E9x cars. The first generations are called 6HP19 and 6HP26 by BMW. The second generation is called 6HP19TU and 6HP26TU by BMW. To make things a little more complicated BMW only refers to the transmissions like that in internal documents, but not in the parts cataloge. There all transmissions are referred as 6HP19Z and 6HP26Z, regardless of the generation. This is all BMW notation. While ZF calls them 6HP19 (1st gen) resp. 6HP21 (second gen) and 6HP26 (first gen) resp. 6HP28 (2nd gen). Thats my knowledge at the moment.

The dates for the switch from 1st to 2nd gen are as follows:

Mar 07 for 335i
Mar 07 for 335d
Sep 08 for 325d/330d (M57)

Since AFAIK the 335d was introduced in 2009 to the US market the tool should work for EVERY US 335d.

To clarify: At the moment the tool ONLY works with 2nd gen 6HP transmissions. 1st gen are organized completely different. Sadly that means that 1st gen cars will not be supported at all. Not at the start and possibly even not later. That depends if parts of the method can be carried over, or if there has to be found a completely different loophole.

Best,
Richard

[RBT-Tuning]

Concerning the 2-3 shift problem: I`m not aware of that and my 2011 car definitely isn`t suffering from that. I can have a look into it, if I get some more information from you guys. Does it apply to all MY? 335d and 330d/325d? Is there a service bulletin from BMW available?

Best

[dixy2k]

Originally Posted by temporaptor

Strange, I wonder why it seems only 2009's have been having major issues? Anyone with 10's and 11's have any trans failures and need fixing/ replacement?



Wouldn't a jerk be the opposite of a slip? The shift going too fast and lacking slip? A smooth shift is one that slips.
My x5 35d does it when cold so I know what your talking about.

Mine is a 2011.


When cold, depending on how I drive it could be either a jerk or a slip. After it warms up there is no more slip, only a jerk.

When you rev it more the jerk is diminished to the point where sometimes it is not noticeable. But you cannot drive it in race mode all the time. Stop and go traffic is horrible. I often shift it in DS so it wouldn't shift to third at around 20 MPH, but a little above that speed. It does it in Manual mode too, as well as DS (again depending on how it's being driven).

[dixy2k]

Originally Posted by RayBan81

Concerning the 2-3 shift problem: I`m not aware of that and my 2011 car definitely isn`t suffering from that. I can have a look into it, if I get some more information from you guys. Does it apply to all MY? 335d and 330d/325d? Is there a service bulletin from BMW available?

Best

Not sure which MY is most affected, but it is a well known issue.
A google search would return a lot of hits.

[Hoooper]

Originally Posted by DWR

I don't know if there is a definitive answer, but there are 2009s with 6HP28. Whitbread has one. The 6HP28 was the second generation of the 6HP gearbox, introduced in 2007. Unless someone has evidence otherwise, it is my belief that all the US 335d are 6HP28 equipped.

My 2010 programming says 6hp26tu which it sounds like maybe means the case would say 6hp28? Are the software versions different between the 26 and 28? I know from earlier in the thread we were running the same software version number.

[lnxguy]

Hooper read what Rayban just said in his latest reply. All of us should be good.

[Hoooper]

I could have sworn mine says 26 on the side but I guess I'll have to look again

[DWR]

Originally Posted by dixy2k

Not sure which MY is most affected, but it is a well known issue.
A google search would return a lot of hits.

Or is it a case of confirmation bias?
Here's a a search of 3rd to 4th shifting problems. I think you can find whatever you want on the internet.
Also note, both searches have entries not related to our transmission or at least the same calibration.
I am aware of more issues that people on this forum have had, with this trans, that are not the problem you have.
Not saying your problem isn't real, just that there is nothing special about the 2nd to 3rd shift that would make it more prevalent. But the real point is the new calibrations currently being developed are not a fix to a shifting problem.

[9mmkungfu]

Originally Posted by dixy2k

Mine is a 2011.


When cold, depending on how I drive it could be either a jerk or a slip. After it warms up there is no more slip, only a jerk.

When you rev it more the jerk is diminished to the point where sometimes it is not noticeable. But you cannot drive it in race mode all the time. Stop and go traffic is horrible. I often shift it in DS so it wouldn't shift to third at around 20 MPH, but a little above that speed. It does it in Manual mode too, as well as DS (again depending on how it's being driven).

Mine does this. 2010 model (late 09 production).

[DWR]

Originally Posted by Hoooper

I could have sworn mine says 26 on the side but I guess I'll have to look again

Don't look at the side of the trans. Look at the valvebody solenoids. The cases did not change. The control of the clutches did.
Don't feel bad. Everyone makes this harder than it really is. Here's a funny graphic explaining how to tell the difference - it doesn't even mention the solenoids are different colors and order, lol.

[Hoooper]

I just ordered my next round of tranny fluid change so ill be confirming within the next couple weeks.

[DWR]

Originally Posted by Hoooper

I just ordered my next round of tranny fluid change so ill be confirming within the next couple weeks.

Certainly hope you find yours not to be a 1st Gen.

[ChrizLoud]

To the guys with the jerky transmissions: have you tried the n57 330d cal? Its a big improvement in many ways at least for me. (More info can be found earlier in this thread)

[Mik325tds]

Originally Posted by dixy2k

Shifting from 2nd to 3rd is very rough, it jerks a lot.
Some people describe it as a transmission slip (most commonly present while the engine and transmission are still cold). Right around 20 MPH and about 1900 RPM under a light foot it jerks a lot and it is audible too.

Originally Posted by 9mmkungfu

Mine does this. 2010 model (late 09 production).

dixy2k and 9mmkungfu, can you both please read the aif (user info field) of your EGS and the Adaptation values and post them here?
Also please state if you have ever reset the calibration. We just learned from Robert last week that it is not always a good idea to clear adaptions. If there is something wrong with the tranny it does make things worse plus makes diagnosis of the real problem harder.

[dixy2k]

Originally Posted by Mik325tds

dixy2k and 9mmkungfu, can you both please read the aif (user info field) of your EGS and the Adaptation values and post them here?
Also please state if you have ever reset the calibration. We just learned from Robert last week that it is not always a good idea to clear adaptions. If there is something wrong with the tranny it does make things worse plus makes diagnosis of the real problem harder.

I really have no idea what you are referring to regarding the AIF. Not a technical guy here.
If you can tell me where to look, I will do it.


M transmission was at the dealer twice for this problem and they did an adaptation thingy. The way it was explained to me is that the tranny learns the driving habits of the owner and somehow tries to shift according to the driving style. While it does so the software and the hardware are not in sync. The software tell the tranny to shift, but the hardware lags in response therefore creating a time discrepancy which causes the jerky reaction.


Maybe it is the stupidest explanation ever and the SA did it this way so I can somehow visualize it. It may totally bogus, I just don't know. Can't contradict the guy.

But they did emphasize the word "adaptation" a few times.

Of course after the second fix failed, I had no intention of ever having it "fixed" again since it failed twice.
Did a quick search on the matter and found out there are a lot of 6 spd trannies out there with the same symptoms.



This is from GM trucks with a copy of the ZF tranny. Same inherent issues.

http://www.silveradosierra.com/trans...e-t109089.html


http://www.performancetrucks.net/for...-487548/page2/

BMW complaints:

http://www.1addicts.com/forums/showthread.php?t=808638


http://www.bimmerforums.com/forum/sh...while-shifting


http://www.m3forum.net/m3forum/showthread.php?t=272734

[davidjaen]

Originally Posted by Mik325tds

dixy2k and 9mmkungfu, can you both please read the aif (user info field) of your EGS and the Adaptation values and post them here?
Also please state if you have ever reset the calibration. We just learned from Robert last week that it is not always a good idea to clear adaptions. If there is something wrong with the tranny it does make things worse plus makes diagnosis of the real problem harder.

My ZF6HP28 has UIF ZB NO. 7576511.

[Arthuar]

Originally Posted by RayBan81

Hi guys,

it`s a little confusing, but I will try to sum it up:

6HP is available in 2 generations in the BMW E9x cars. The first generations are called 6HP19 and 6HP26 by BMW. The second generation is called 6HP19TU and 6HP26TU by BMW. To make things a little more complicated BMW only refers to the transmissions like that in internal documents, but not in the parts cataloge. There all transmissions are referred as 6HP19Z and 6HP26Z, regardless of the generation. This is all BMW notation. While ZF calls them 6HP19 (1st gen) resp. 6HP21 (second gen) and 6HP26 (first gen) resp. 6HP28 (2nd gen). Thats my knowledge at the moment.

The dates for the switch from 1st to 2nd gen are as follows:

Mar 07 for 335i
Mar 07 for 335d
Sep 08 for 325d/330d (M57)

Since AFAIK the 335d was introduced in 2009 to the US market the tool should work for EVERY US 335d.

To clarify: At the moment the tool ONLY works with 2nd gen 6HP transmissions. 1st gen are organized completely different. Sadly that means that 1st gen cars will not be supported at all. Not at the start and possibly even not later. That depends if parts of the method can be carried over, or if there has to be found a completely different loophole.

Best,
Richard

so, the EU 330xd 2007 as mine e91, is not covered?!..I understood wrong..

[dixy2k]

I found some info about the rough shift here.

http://www.bmwlogicseven.com/?p=3738


"SINCE 99% issues with this trannies are related to valve body fluid pressure loss, i strongly recommend new (remanufactured) valve body from ZF, or have it rebuilt by REVMAX Converters or buy a SONNAX zip kit and do it yourself, but to get perfect results and save money and time you should consider entire valve body (mechatronic) swap or rebuilt with proper testing"

[torqueisking]

Originally Posted by ChrizLoud

To the guys with the jerky transmissions: have you tried the n57 330d cal? Its a big improvement in many ways at least for me. (More info can be found earlier in this thread)

maybe it's a mechanical tolerance issue?

I've reset the adaption on both of mine.

My 09 335D has never jerked.

10 X5 35D always jerks from 2-3 with light throttle, hot or cold. Changed the trans fluid and filter and it still does it.

[Mik325tds]

Originally Posted by dixy2k

I really have no idea what you are referring to regarding the AIF. Not a technical guy here.
If you can tell me where to look, I will do it.


M transmission was at the dealer twice for this problem and they did an adaptation thingy. The way it was explained to me is that the tranny learns the driving habits of the owner and somehow tries to shift according to the driving style. While it does so the software and the hardware are not in sync. The software tell the tranny to shift, but the hardware lags in response therefore creating a time discrepancy which causes the jerky reaction.


Maybe it is the stupidest explanation ever and the SA did it this way so I can somehow visualize it. It may totally bogus, I just don't know. Can't contradict the guy.

But they did emphasize the word "adaptation" a few times.

The BMW guy told you two different things at once. "The tranny learns the driving habits" really has nothing to do with adaptations that we are looking for. This is purely done through selecting different shift maps for different driving styles. The more aggressive driver will get some higher shift points than the cruiser with light throttle application.
The adaptations though are there to adapt the SW to the production tolerances of valves and wear of clutches. If for instance, the SW sees a flare during shifts, it'll try to close the clutches a little bit more rapidly next time. In fact there is a parameter "rapid fill time" which adjusts the time needed in order to move a clutch pack from open to the friction point. That needs to happen super fast while the point from friction to closed needs to be slow and smooth.

So if your adaptation values are very high or very low, that indicates a mechanical problem. If they are in the normal range, a different cal may help you.
What is your mileage and have you replaced oil and filter already in your tranny? Do you have the BMW toolset (Ediabas or Rheingold (ISTA-D)?

[Mik325tds]

Originally Posted by davidjaen

My ZF6HP28 has UIF ZB NO. 7576511.

Your 335d jerks also from shift 2-3? I couldn't find your ZB No anywhere in the SW updates. You sure you didn't mistype?