1cerberus4u

Good morning;

I continue to have challenges with an rpm "flair" in my 2/3 shift and a bit in my 3/4 shift.

While I have not taken the car to the dealer to test the adaptation fill rates (which I understand they can test for) on shift speeds, I plan to do a maintenance run on the tranny

I have been led to believe that the valve seals do wear out and that changing them could make a significant difference.

I have also been told that the tranny valve seals are a specific part number.

Anyone know much about this issue and what the seal numbers are?

Thanks

cm60k

Do you mean small o-rings of shift solenoids..?

ZAYED,,

1cerberus4u

Zayed;

Honestly I have not looked at a schematic of the tranny (lazy I guess), so I would assume so as these are accessible when you drop the pan?

cm60k

Yeah, if it refers to the valve solenoids, pan & valve body should be removed to access them,,

these o-rings not coming separately, they comes assembled with solenoids..!!


ZAYED,,

1cerberus4u

I do think they are available separately

O-55

I do not believe the valve solenoids are available separately on the 722.9 transmissions. The pressure solenoids are available separately, but the valve solenoids come with the valve body. I'll post a snippet soon.

O-55

Here you go.

1cerberus4u

OK, let me circle back with the source and get a clairification

O-55

My mistake. If you look at the part listings, you'll notice that the transmission uses 4 of each (parts 20 and 30). I am not familiar with the 722.9 transmissions. Ask your source what the difference is between the blue and black cap solenoids.

1cerberus4u

I will ask, but I was told to Replace the 8 Blue seals with this part number: 011 997 1448

Any idea of what they correspond to?

Best

cm60k

This seal part # for 722.3, 722.4 tranny, NOT for 722.6 or 722.9..!!

ZAYED,,

1cerberus4u

And which tranny does my 2007 e63 have?

WANTED!!

Any special reason why you would have to use the oem o-rings vs just matching them up to an aftermarket equivalent?

cm60k

^+1^,

You have 7G-722.9, what exactly happened to these o rings, is someone cut them accidentally when tried to remove them..??

ZAYED,,

1cerberus4u

What I am being led to believe is that if a tranny is "flaring" between gears that it could be due to a slowness of fill rates. (which should be checked at the dealer who can do timing check on how long it takes to fill between clutch packs)

He said that these seals are known to wear out and not hold sufficient pressure, which in turn slows fill rates

Thoughts?

cm60k

MB guy should not say that, cause he knows these seals not comes separately..!,

i could be wrong, but as i know; the most common of 722.9 are Elc. plate & solenoids failures..!

ZAYED,,

1cerberus4u

Actually they do come separately as I just ordered a set from the local MB dealer......

If the tranny is "Flaring" on upshifts, do you have any other thoughts on what could be causing it?

Maybe a forewarning of a solenoid going bad?

cm60k

That's good, what's the part # of those seals, it will help to know what the issue they referred to..?

ZAYED,,

1cerberus4u

011 997 1448

cm60k

Andy,

Did they say this # is capable to your solenoid..?, how many piece they required..??

ZAYED,,

1cerberus4u

They did not say specifically, but only to the suggestion that I replace the seals, as that may be the cause of my "rpm flare" between shifts.

You would need 8 of the seals, or so it says...

cm60k

I see& good luck,,

don't forget to keep us posted..

ZAYED,,

1cerberus4u

Will do!

I also plan to bring the car into the dealer and have them check for the adaption fill rates to see if it changes

cm60k

Good Move..

ZAYED,,

1cerberus4u

My guy says to seals for the 7 speed are not available, so they did the work to make sure these fit, which he confirms they do