As title states...do the later 722.6 need the plug replaced entirely or is the plug sucking fluid into the ecu fixed and it's just the orings with an external leak?

Thanks

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

What do you define as late?

Considering how cheap the part is I'd replace it.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

To my knowledge every one of the 722.6xx will have to have the original pilot bushing replaced. It's been redesigned/superseded at least three times since the transmission was introduced.

And as noted, it's an inexpensive part and not terribly challenging to change, so why not just do it? Just be extra careful on two points: one, when inserting the new bushing be sure to liberally lube the casing and the O-ring and to align it carefully before sliding it straight in. DON'T twist it or get it off angle or you'll damage the conductor plate, turning this into lots more work and expense. Two, be sure you fully seat the new bushing rather than just trying to get the bolt to catch and pull it in that way. It's a tiny fastener, only designed to hold it in place, not pull it into place, and you'll break it off, which will turn this into lots more work and expense.

Hope that helps.

Good luck.

Its not a cost issue. I just wanted to know. If its no longer an issue, I'll just replace the o-rings. If the whole thing needs to be replaced, I'll do it.

I just remember when I did it on the 2002, I couldn't screw the replacement one in for whatever reason. I ended up replacing the o-ring and had to reinstall the original...it was kind of a pain.

Its a 2008 E350...so about the final year it was offered (2009 was last from what i know)

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

I have not done mine yet,its a 99

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

All three generations, and the Chrysler's 722.6's have this problem too.

Martin

How disappointing they couldn't fix something so simple even after 10 years??

I'll get it ordered and be done with it. Hopefully it won't fight me screwing it back in the socket this time.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

Its a maint. item.rubber does not last for ever.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Its a design flaw that the plug can draw fluid up that is what I am saying.

Usually they are pretty good at fixing this type of stuff.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

Yes it does leak and the only correct way I know to install that bushing is to first eyeball where the locking collar is in unlocked position.

Slather transjel on the O rings or even a heavy dose of ATF - position it squarely in the opening at the correct orientation, gently feel the 3 teeth that catch - (this is a confirmation test proving the bushing is perfectly aligned and ready to be pushed home).

with the transjel or slathered ATF on the O rings the bushing will suddenly seat into place with slight force applied to it. Tighten down the screw a smidge more than finger tight.

I have seen a video where the bushing is being pulled in with the tiny screw and with no lube on the O rings - I could hear it squeak in the video also, such practice is a very sure way to damage the brass trapped nut in the conductor plate.

please note that the URO branded part is garbage, its got some strange dimensions where the O rings are thinner and the plastic case is larger. Always buy the original mercedes benz part - its cheap too.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

Does anyone have the mopar part number since it's the same and cheaper at the Chrysler dealer?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k

last time I needed one - I walked up to the parts counter and said that I want the electric connector on the transmission of a 2010 dodge charger.

out comes the part - they usually have dozens of them at hand.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

I thought the problem with fluid in the TCU was actually caused by the wiring outer protection sheath. If this is cut near the plug, then leaking fluid will just drip down instead of going up the harness.

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Prost!

That's funny -- I just learned that our 2014 Jeep Wrangler also has the 722.6...! Nice!

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k