My 6hp26 experience

[fmugur]

As you can see on my signature I have two X5s with 6hp26 tranny.

The 4.4 has the well known 2-1 bang problem when accelerating before going to a full stop and a harsh up shift 1-2 in cold mornings. Otherwise the transmission is smooth like new.

The 4.8is got the same problems plus a harsh shift 2-3 or 3-4 (not sure) when accelerating fast from a traffic light. In normal driving this problem is not happening. The harsh up-shift 2-3/3-4 felt like the clutches were braking for a split of a second. I don't know how to describe it well.

My wife wouldn't feel any of these on the 4.8 but it bothered me so I had to do something.

Over the last two years, I did the firmware update, 4L oil change and filter but it didn't feel like it fixed anything or not significant. Last year, I changed the square and cylinder VB rubber seals and again the tranny was not as smooth as some of you found after these changes.

A week ago I changed the solenoids (US $260.00) and so far I can say that the transmission feels like new.

The procedure is pretty straight forward and is well documented on internet.

Everything about your ZF 6HP26, 6HP19, 6HP28 transmission issues | BMW LOGIC7

https://www.youtube.com/watch?v=zwjvxRZyvWM&t=40s

Re-learning procedure after the adaptation reset

Here is the proof

[thrillcat]

Can you just post a link to the video? It's not working for me embedded. Thanks!

[BMW-x5-48is]

Originally Posted by fmugur

As you can see on my signature I have two X5s with 6hp26 tranny.

The 4.4 has the well known 2-1 bang problem when accelerating before going to a full stop and a harsh up shift 1-2 in cold mornings. Otherwise the transmission is smooth like new.

The 4.8is got the same problems plus a harsh shift 2-3 or 3-4 (not sure) when accelerating fast from a traffic light. In normal driving this problem is not happening. The harsh up-shift 2-3/3-4 felt like the clutches were braking for a split of a second. I don't know how to describe it well.

My wife wouldn't feel any of these on the 4.8 but it bothered me so I had to do something.

Over the last two years, I did the firmware update, 4L oil change and filter but it didn't feel like it fixed anything or not significant. Last year, I changed the square and cylinder VB rubber seals and again the tranny was not as smooth as some of you found after these changes.

A week ago I changed the solenoids (US $260.00) and so far I can say that the transmission feels like new.

The procedure is pretty straight forward and is well documented on internet.

Everything about your ZF 6HP26, 6HP19, 6HP28 transmission issues | BMW LOGIC7



Here is the proof

I think I posted the link to these fixed a few weeks back.. Dont know if you were going by mines? but they pointed to the Logic7 Writeup on everything from the adapter seal, which fixed my problem to the solenoids, that worked for you.. :-)

There are so many dozens of so called "alleged fixes" - but only the ones on the list are the real ones.. :-) cheers

here is link again to original post -> http://www.xoutpost.com/bmw-sav-foru...er-load-3.html

[BMW-x5-48is]

Originally Posted by thrillcat

Can you just post a link to the video? It's not working for me embedded. Thanks!

Here is link ->> Everything about your ZF 6HP26, 6HP19, 6HP28 transmission issues | BMW LOGIC7


These will solve your problems for good brother..

[electricalserv x5]

Originally Posted by fmugur

As you can see on my signature I have two X5s with 6hp26 tranny.

The 4.4 has the well known 2-1 bang problem when accelerating before going to a full stop and a harsh up shift 1-2 in cold mornings. Otherwise the transmission is smooth like new.

The 4.8is got the same problems plus a harsh shift 2-3 or 3-4 (not sure) when accelerating fast from a traffic light. In normal driving this problem is not happening. The harsh up-shift 2-3/3-4 felt like the clutches were braking for a split of a second. I don't know how to describe it well.

My wife wouldn't feel any of these on the 4.8 but it bothered me so I had to do something.

Over the last two years, I did the firmware update, 4L oil change and filter but it didn't feel like it fixed anything or not significant. Last year, I changed the square and cylinder VB rubber seals and again the tranny was not as smooth as some of you found after these changes.

A week ago I changed the solenoids (US $260.00) and so far I can say that the transmission feels like new.

The procedure is pretty straight forward and is well documented on internet.

Everything about your ZF 6HP26, 6HP19, 6HP28 transmission issues | BMW LOGIC7



Here is the proof

So now that You have done all this work...............The real problem is Your Vanos Solenoids [n62 -all 4 of them] They most likely need to be replaced with new one, 99% chance they are stuck to the advance setting causing you DME and Tranny computer not to be in sinc causing Your Tranny to shift to High and with No lows or low end torque.

Just saying

[fmugur]

Originally Posted by electricalserv x5

So now that You have done all this work...............The real problem is Your Vanos Solenoids [n62 -all 4 of them] They most likely need to be replaced with new one, 99% chance they are stuck to the advance setting causing you DME and Tranny computer not to be in sinc causing Your Tranny to shift to High and with No lows or low end torque.

Just saying

I was looking into this since you posted your vanos results but but I am still not convinced yet. I will post on your vanos tread.

[fmugur]

Originally Posted by thrillcat

Can you just post a link to the video? It's not working for me embedded. Thanks!

Fixed it.

[fmugur]

Originally Posted by BMW-x5-48is

I think I posted the link to these fixed a few weeks back.. Dont know if you were going by mines? but they pointed to the Logic7 Writeup on everything from the adapter seal, which fixed my problem to the solenoids, that worked for you.. :-)

There are so many dozens of so called "alleged fixes" - but only the ones on the list are the real ones.. :-) cheers

here is link again to original post -> http://www.xoutpost.com/bmw-sav-foru...er-load-3.html

Yes, I read it. Good thread. I should have posted my findings on your thread.

I will do the seals/oil/filter on my daughter's 4.4 soon.

[AV8R4AA]

Wow , great news
Can you post where you bought your parts?

I need to do this so bad.

[fmugur]

Originally Posted by AV8R4AA

Wow , great news
Can you post where you bought your parts?

I need to do this so bad.

I asked on another thread about this navytransmission ebay seller.
When I rebuilt my 5hp24 I bought zf stuff from Eriksson Industries or cobratransmission but I found this ebay seller who claimed he sells ZF solenoids at wholesale price.

Here is the direct link:

ZF 6HP19 6HP26 6HP32 Auto Transmission Solenoid kit ZF# 1068298044, 2004-UP | eBay