S65 722.6 gearbox issue?

[V6Matty]

Great, will see you there

 

[bembo449]

man date fellas ?

 

[V6Matty]

Think I’ve found where this is on my car but someone mind double checking me?
Damn, my iPad won't upload the screen shot, never mind I'm pretty sure I'm in te right place in xentry

 

[hoppo]

Heading over now see you 2.30

 

[alexanderfoti]

Think I’ve found where this is on my car but someone mind double checking me?
Damn, my iPad won't upload the screen shot, never mind I'm pretty sure I'm in te right place in xentry

Pm me of you get stuck.

 

[hoppo]

Pm me of you get stuck.

I'm just back from meeting with Matt. (Thanks you so much for your time again)

The fault codes are the same as listed on the snap on scanner.

And the results of the adaptations are below

 

[alexanderfoti]

Your adaption values are odd. The car isn't adapting by the look of it as K3 is 0 which is only accurate if he car is new!

B2 is high but not that high, not high enough to indicate an issue with it IMO. Do you have any if the other values?


Possibly causes are bad electroplate giving incorrect oil temperature readings. You could go through the adaption process on star but I would think that you will have an issue.

Has anyone reset the adaptions?

 

[V6Matty]

Your welcome Hoppo, glad I could be of some help,

Alex,
Afraid the laptop died before we got back after a drive but yes we did reset and no real difference, we then did a reset using tourque values which was successful but again didn't particularly help.
One thing I noticed was ups shifts are pretty good all the time, but it's the downshifts wether on acceleration or deceleration that are noticeable, more so on deceleration I'd say but that was only a short drive. It did finally drop out of gear just after coming off a roundabout and over a rough patch of road so to me it's starting to say something is loose and not being read, which might co inside with your assumption that those values look odd.

 

[alexanderfoti]

Your welcome Hoppo, glad I could be of some help,

Alex,
Afraid the laptop died before we got back after a drive but yes we did reset and no real difference, we then did a reset using tourque values which was successful but again didn't particularly help.
One thing I noticed was ups shifts are pretty good all the time, but it's the downshifts wether on acceleration or deceleration that are noticeable, more so on deceleration I'd say but that was only a short drive. It did finally drop out of gear just after coming off a roundabout and over a rough patch of road so to me it's starting to say something is loose and not being read, which might co inside with your assumption that those values look odd.

Just remind me, what has been done on this box so far, just an oil/filter change?

 

[V6Matty]

Reading back at the start of the thread I think filter, oil and conductor plate

 

[alexanderfoti]

Reading back at the start of the thread I think filter, oil and conductor plate

Did you manage to have a look at actual values at all?

Has it had engine mounts/gearbox mounts? Could be vibes transferring into the box causing it to go wonky. As mine only does it when I chop the throttle moments after a hard change, I wonder if its vibration related.

 

[V6Matty]

No that was the next step after the drive but the laptop died, going to have to get a second battery for it

 

[hoppo]

The box had a new conductor plate, bushing and oil and filter change.

Codes cleared and adaptations reset using snap on.

Then today star code read with Matt.

And we reset the adaptations and then the converter adaptations. With no change in performance.

To me it kind of explains a lot.

The box only started the harsh changes after the adaptations were reset the first time. When the codes were cleared following the first incident of it losing drive.

If the box is worn a bit and then not adapting the k3 clutch it would explain the poor change.

The question is why is it not adapting?

 

[alexanderfoti]

The question is why is it not adapting?

Mechanical wear with K3.

When wear happens over a slow period of time, the adaptions take up the slack. When the adaptions are reset, they cannot compensate for a large amount of wear or fault and end up not adapting.

Its also possible the values being reported by the plate (oil temp is the only one I can think of) are out of spec and preventing adaption.

I think you are going to have to bite the bullet and get the box dropped out and some new seals/frictions put in place.

You can faff with the valve body etc, but the money spent on labour would be better put towards a rebuild IMO

Do check live values first though.

 

[hoppo]

Ok so we think its the k3 clutch. The last thing I wanted to do was pull it all out and it be something simple.

Is there no way to manually force the adaptations. That way at least it would be as good as it can be for now?

Alex did you say you were in daventry?

Would you be avaliable to take a look with me at some point? I'm more than happy to compensate you for your time and expertise as you are clearly the resident expert.

 

[hoppo]

On the point of it being false readings for the plate.

I can't see 2 different plates having the same problem can you? Also if I remember correctly the atf temp as 98 I think after a good hour of running

 

[alexanderfoti]

Ok so we think its the k3 clutch. The last thing I wanted to do was pull it all out and it be something simple.

Is there no way to manually force the adaptations. That way at least it would be as good as it can be for now?

Alex did you say you were in daventry?

Would you be avaliable to take a look with me at some point? I'm more than happy to compensate you for your time and expertise as you are clearly the resident expert.

Apparently, you did with V6matty? It can be done through the STAR and it guides you through keeping the throttle at certain positions etc? The car must be left running and in park for 5-10 minutes after for the car to store the adaptions.

I am actually in the middle of opening a MB specialist garage but in London (near bromley). I wont be ready to start looking at cars until end of October realistically.

You can drop the valve body and check for non broken springs etc, but you are now ending up in gearbox rebuild area. I feel it would be better to engage a gearbox specialist and let them diagnose at this stage.

 

[hoppo]

Ok I'll see what I can find from the local guys but you may well see I'm in October if I don't get anywhere.

With Matt it was only the torque converter reset that had a drive with green bars to keep within the gear adaptations didn't.

I think that's right Matt?

 

[alexanderfoti]

Standard adaption is the same, keep us updated though.

 

[V6Matty]

Sorry for the late reply, it was the adaptions we reset via torque values, that said I didn’t know about the sit with engine running for 10 minutes after to store them, so might be worth another shot at that as well as looking at the live values?
I’m in the office today in Birmingham so will be coming past Leicester this evening,