E320 CDI 3,0 '07 aut.gearbox, unnormal shift between 1.-2.gear

[Aliaz]

A few weeks ago the gear fluid was changed and new filter. Converter was drilled.
Fluid level checked by the right temp.

The car has a hard/unnormal/slow shift between the first and second gear.

Fluid is Fuchs Titan 4134.

Gearbox is resat. (Key just before engine start. Speeder down 10-15 sec. Key back to off. Wait 2-3 min. Key out.)

What could the problem be?

 

[ELGRINGO]

Have seen several faults simular with 7g transmissions need to check gear box adaptations and speed sensor information.

 

[Aliaz]

Thanks. How do I do that? Is there anything else that I could check og should check ?
All other gears - upshifts and downshifts without any problems.

 

[ELGRINGO]

Hi neds to go on star machine and check adaptations ie, fill up time of brake and clutch packs.

 

[Aliaz]

Can adaptations be bad after som time? Do the need to be adjusted?

I thought that adaptations where like new always, but there could be som updated/better software - is that right?

What about "fill up time" of brake and clutch packs. Will these get more bad by time?

 

[television]

There have been many problems coming up on the 7g box, the speed plate is now on back order from what I understand.

 

[Aliaz]

Thanks. Can some of you describe for me what the speed plate is and what it does?
Is it "just" a thing to change? How long does it take to change?
How about the price for the speed plate?

Could it be something else?
I mostly think it could be hardware related and not just be fixed be software update but I don't know..

 

[television]

The speed plate is responsible for the changing of the gears at the correct speed related time. There have been many failing on these boxes. It is not that cheap as it now only comes with the valve block from what I understand.

Maybe one of our indies will come on and explain a little more

 

[Aliaz]

The speed plate is responsible for the changing of the gears at the correct speed related time. There have been many failing on these boxes. It is not that cheap as it now only comes with the valve block from what I understand.


Maybe one of our indies will come on and explain a little more

Would be nice.


http://mbworld.org/forums/e-class-w211/399547-help-gearbox-surge-e320-w211-2004-a.html

What about #11 or #15 at the link ?

 

[Aliaz]

Could it be something from the link above?

 

[WG M-B]

No that is relating to tc issues on the 722.6 tranny. You have a 722.9! I'm assuming the harsh changes have coincided with the service carried out on the transmission?
As long as there is no flaring whilst changing and the fluid level is correct I would say your jerky upshifts when cold can be cured by a software update. Although, I have noticed with some of the earlier 7g boxes this is a not so nice characteristic.

 

[Aliaz]

Thanks. Here is some informations.Today the car has driven 327800 km.

Back in in april 2008 at 161000 km I can see at the bills:
AT Gear box checked (short test)
Adaption
Gearbox (722.9) was off and on. Gearbox made up again - parts replaced as needed.
New converter
-"Planetary carri" ???
oilpump

@232103 km:
Gearbox checked again. + adaption. Harsh/poor gear shifting between 1. and 2. speed.

@249000 km: Gearbox checked again.

I bought the car at 306.000 km. At that time the car had a good shifting between 1. and 2. speed.
At service 161000 km the gearbox fluid was changed can I see in the papers. I don't know if the fluid was changed again before 306.000 km.
I got the fluid changed at 322.000 km (only 5L, converter was not drilled). That mechanic used wrong fluid with specs 236.81 by Castrol. -and fluid level was not correct (lower).
Alle speeds were okay, but at low rpm and high acc - typical after turning left or right and acc - the car doesn't take action. I got chocked and lift my foot - and acc. a little - then it take action.

After that I found out that the fluid and level was wrong. Found a Mercedes specializes workshop and got filter and all 8L changed with Fuchs Titan 4134.
Now the car drives much better. Shifting is much smoother and more correct.
A few days after. Haven't driven much km. The shifting between 1-2. speed got worse. More like a strange/jerky shifting - and only in 1-2 speed. -not like "oil needs changing".

Is "adaption" the same as updated software programming?

In Auto Data I can see that TCM software fault is a known bug.
My car is a 1/2007 (facelift). At least 2 years newer than the first model. Can I calculate on that the car has updated software?
Can I check it in the display without a tester?

Can adaptations be bad after som time? Do the need to be adjusted?

What about "fill up time" of brake and clutch packs. Will these get more bad by time?

Hope some of you can answer some of the questions. Thanks!

 

[Aliaz]

I think "judders" is the right word in english. Between 1. and 2. speed.
With hard accelleration its less than normal or slow accelleration.
Sometimes it feels a lot more normal/less than other days. Can't see if it's worse when it's cold or not. From start or after a while.

 

[WG M-B]

I would go to your local dealer, ask to have the latest software installed. If this doesn't cure it you could have a valve body issue.
Get the software done first

 

[Aliaz]

Thanks a lot! What are the symptoms of a valve body issue?
Are there a valve body between all speeds?

Software ought to be the same - and not be more bad by time - but I don't know if it's like that?

Found a good thread:
http://mbworld.org/forums/e-class-w211/372088-2007-e-320-bluetec-hard-downshift-1st-2nd-gears.html

Guess that mine isn't a bluetec. No sign on the back. But how can I check. Bluetec isn't listed at the registration certificate.

Information from the link:
"ECU and transmission software updates for the 211.022:

P-B-27.00/87b FEB07 – transmission flare between 1-2 or 2-3 when cold or first shifts of the day
S-B-27.00/104 APR08 – hesitation accelerating back up from low speeds
S-B-27.00/105 APR08 – harsh 1-2
S-B-27.00/107a OCT08 – uncomfortable shifts 1-2, 2-3, 3-2, and 2-1

Normally DTBs are not covered out of warranty but in this case, MB released SW updates to correct specific BlueTec performance problems. Print this post and request goodwill repair."

I haven't noticed any downshift problems. Only from 1. - 2. speed.
But I've noticed this:
* Hesitation accelerating back up from low speeds
* Harsh 1-2
* Uncomfortable shifts 1-2
-don't know what "flare" means?

 

[Aliaz]

Car never gone in "limp mode".
And I have never seen "check engine" massages in display.

 

[Aliaz]

If I drive - brake - turn left or right - pull/acc. a lot - sometimes nothing happens. I got shocked and lift my foot from the speeder - pulls normal and the car drive.
Only at first speed or between first and second.
Thats one problem.

The other problem is a hard shift between first and second speed.
It's a unnormal/strange shifting which irritates me. Maybe jerky shifting is the right word in english. Or a surging feeling as it shifts between first and second speed. Can't find any similarities if it's cold or warm - at start or later.

All other speeds - there's no problems. Fluid level should be okay - the mechanic messured the gear-fluid by the right temp. He's 99% sure of that the level is right.

What can I do to check or isolate the problem?

 

[television]

Not sure if there is a cure for this from what I read, we have several members complaining of the same thing, not good is it

 

[Aliaz]

There must be a cure

When the car never goes in to limp mode - I think there's no problem with the EGR valve. -Or could it be the EGR valve even?

If you remember other threads with likely problems you're welcome to past the links, thanks.

 

[television]

There must be a cure

When the car never goes in to limp mode - I think there's no problem with the EGR valve. -Or could it be the EGR valve even?

If you remember other threads with likely problems you're welcome to past the links, thanks.

I am thinking of a car that uses the 7g box and am scanning all the info that I can get because of this problem, I am trying to work out the years where this complaint stopped and the cure if there is one