Sorry. Pic attached

thanks

 

Ok, being we can not see the other side (unless you have that pic also) I am going to assume that they installed a used complete valve body with used unknown mileage solenoids into your vehicle, most likely without disassembling the solenoids from said valve body for cleaning and testing prior to install...

I can not confirm as to if solenoid 5 is 2nd gear or 5th gear at this moment, as I do not think that is the way it works, meaning the work in a certain order to operate.

Be back to you in a bit.

Johnny

 

Hello Dav,
I really do not know what else to say, but then to have someone who works on the ZF 6HP 26A transmission take a look at it, if it is as you say and this used item was installed, please refresh my memory as to if the vehicle had any transmission problems at all when you first drove it upon purchase, as the problem here is that we have no clue as to the level of work preformed while doing said install of the used part, were the 4 tubes replaced, was the bridge seal replaced, were the solenoids resistance tested prior to install, or did the seller have this valve body installed without and of the above work done, and it did not solve the problem, so he sold it...

See these videos, and pictures. I know these are BMW videos, but it is the same setup.


https://invidio.us/watch?v=MLXuAAaa9bM



...

 

Also have a look at these, your shift value is shown as "1" in the picture you posted in other thread, that is a little odd to me, it's like its holding a gear instead of shifting, unless I am misreading the statement.

http://maybeme.com/Storage/JagTech/M...6%E2%80%9D.pdf

Again this info is for the 6HP26, it is used in many vehicles, so some info is different, such as the BMW having no gear selector cable, therefore it has extra solenoids to put it in park electronically, but still has the same basic function/operation as the Bentley 6HP26A61.

..

 

Thanks Jonny for all this useful info. Basically when I bought it the car would reckon to 3000 and not shift up. This issue disappeared when fluid was topped up after which this shift up from 1 to 2 and shift down from 3 to gear 2 kicked in. To be clear this only came about after the fluid top up - which could in itself suggest it needs some kind of software reset? The 1 to 2 shift has gradually improved over time to about 90% perfect with a small jolt when moving up. 3 to 2 down is still around pretty bad as a jolt

thanks

 

Did your INDY try the trans adaption after his scan of the trans/solenoids ?

 

I would also double check to make sure that the trans is not overfilled, as that would cause issues also, he did add 4 liters IIRC, it's worth a check.

 

Thanks Johnny

presume the adaptation is the software reset effectively. He didn’t but that’s what we are going to try next.

but could it be as simple as that?

thanks

 

Yes, sometimes it can, as the trans ECU learns and stores the driver's driving habits and shifts accordingly, plus do we know if the replacement unit is out of the same year (2004) Bentley trans as your vehicle, maybe ask your INDY to check the coding of the trans in the scan, I do not have a scan to share at the moment but maybe someone else here can post a full scan showing their trans coding, I did find this from an 08 GT with coding 0000111, so just wondering what coding you have.

Address 02: Auto Trans Labels: 09E-927-156.lbl
Part No SW: 09E 927 760 K HW: GS1 911 4
Component: ZWGU3406 6L W12TT 3406
Revision: --H04--- Serial number: 0121868
Coding: 0000111
Shop #: WSC 00083 790 00000
VCID: 38292B490E4DF9F7665-5160

No fault code found.

 

Thanks Johnny

indy doesn’t have the computer to reset the software or to tell which year it was from

on the software reset or adaptive settings, does this just reset it or then does the garage need to reprogram it?

any idea on cost for this?

thanks

 

Not an 04 but closer, this is an 05.


As I read through the thread, some unanswered possibilities:

If the trans was 4 liters low, this is possibly the result from someone (who doesn't know ZF transmissions) removing the fill plug with the engine not running. That would likely be 4 liters. Anyone setting the fill on a ZF correctly, at the specced oil temp with engine running, even if you were off by full operating temps, you couldn't possibly lose 4 liters. A leak is the only other possibility I can think of.

On the trans relearn, if the battery is disconnected (especially in the case of a hard reset, but doesn't need to be) the learned shift points would be lost and upon restart the learning would begin from the start. Still, even without a battery disconnect, the adaptive learning is constantly adjusting so, a new owner acquiring the car, the learn would adjust to that new driver.

 

Thanks - Indy has done a hard reset by disconnecting battery. They are checking fluid level as we speak to eliminate that too.

thanks

 

Hello BWings,
I may have used the wrong terminology in my comments, I am sorry I was not clear, what I am talking about is the mandatory adaption reset aka calibration of the clutches after any fluid change and or hard parts being replaced, this calibration changes the pressures on all clutches and TC as over time and mileage they have drifted and have increased to too high of a pressure to give proper shifts, so as the complete valve body has been swapped out, a mandatory gearbox adaption run should have been performed, it's a sequence of bringing the vehicle up to certain speeds over and over, like 4 to 6 times depending on where you get the info.

One main concern I have read and yet can not confirm is, that according to some writings the 2004 6HP did not have the capability to do any adaption/calibration until a software update was installed onto the 04 trans control module by the dealer which then would allow for such re-adaption and calibration of the trans.

To Dav,
As you posted in the other thread a picture of the readings which appear to be on a VAS 5052-54 with ODIS, I do not understand your comment that your INDY does not have the computer to reset the adaption, it is in the "Guided Functions", If your 2004 allows for such action he should do it, also as we do not know the year of the mechatronics and SW version on said mechatronics its worth a read of the unit with his tool.

Below are some of the steps to follow for doing the adaption calibration, one is for the Audi A8 with the W12, others are for JAG, and BMW, even Rover, they all use this trans and you can find some info, but I at the moment can not find one for Bentley, and I do not have my VAS 5054 with me to see the guided functions, I will attach what I have found online.

Johnny


...






....

Next is some of the other versions of adaption copy and pasted below.

...

Re-Learning the Adaptations

The most important part of resetting transmission adaptations is the re-learn process. Refer to the process

below to see the re-learn procedure your vehicle needs after its transmission adaptations have been

reset.

Before starting this procedure, ensure the following conditions have been satisfied;

1) The adaptation values have been cleared

2) The error memory codes, if any, have been read, recorded and cleared

3) ATF temperature is 122F or above (adaptations will not learn if not)

1. Step 1 Adaptation Re-Learn Procedure (D-Mode)

1) From a standstill, accelerate the vehicle in D Mode with very light throttle (15-25% if

monitoring pedal angle with MHD) to 4th gear

2) Continue to accelerate with light throttle (20-40%) to 6th gear

3) Let the vehicle coast to ~25mph, then slow the vehicle to a standstill with light brake

application

4) With the brakes applied and the vehicle at a standstill, wait for 10 seconds

5) Repeat steps 1-4 for 9 cycles, then proceed to Step 2 below (M-Mode)



Page 4

2. Step 2 Adaptation Re-Learn Procedure (M-Mode)

1) With the shifter in M Mode, accelerate the vehicle to ~30mph and select 3rd gear

2) Continue driving for 2 miles

3) Accelerate the vehicle to ~45mph and select 5th gear

4) Using light throttle, accelerate to 50mph and then coast to ~40mph without applying the

brakes, repeat for 4 cycles, then

5) Accelerate to 55mph and select 6th gear

6) With light throttle, accelerate to 65mph then coast to 50mph without applying the brakes,

repeat for 4 cycles, then

7) Select 3rd gear and repeat steps 1-6 for 5 cycles, then coast to a standstill and proceed to

Step 3 below

3. Step 3 (Shift Confirmation)

1. With the vehicle at a standstill, shift from “N” to “D”, wait 5 seconds then shift back into “N”

2. Repeat this for 4 cycles, then

3. Shift from “N” to “R”, wait 5 seconds then shift back into “N”

4. Repeat this for 4 cycles, then

5. Check error memory to ensure there are no codes

This concludes the basic procedure for re-learning the transmission adaptations. Please keep in

mind that the transmission will continue to learn over the next few days to completely learn itself

into the new parameters and shift quality will continue to improve. Drive the vehicle as normal.

...

One More...


..

No sport mode, accelerate from rest up all the gears, keeping the revs below 2000, and below 1500 if possible.
Once it reaches top gear, let it coast down to a stop, without using the brakes, so it downchanges into each gear. Repeat this as many times as possible. 2 times minimum.
then advise the customer to drive gently and keeping rpm low for the next 200 miles.


Johnny


..

 

Thanks Johnny

unsure if what the Indy could do as just took his word for it.

going to get fluid level checked to make sure not too much, then do the adaptation settings.

will keep you all updated. Thanks for all your help

thanks

 

Hello Johnny,

Hope all is well.

Sorry, my mistake if you were talking about adaptations and not relearns. I am not spending the time here as before and only skim read this thread. I think I caught post 24 about relearn and that became part of my reply......my bad.....

All the Best,