722.6 trans A/T Plug Adapter (Conductor Plate Connector) transmission leak - Mercedes-Benz Forum
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#1 (permalink) Old 12-15-2006, 04:53 PM
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722.6 trans A/T Plug Adapter (Conductor Plate Connector) transmission leak

My wife noticed a couple of quarter size drops of oil on the garage floor passenger side. The first INDY I went told me that I needed to relplace the "electrical conductor plate" within the transmission at $675-$750 US.

The next INDY I went to showed me that I needed to replace the "A/T Plug Adapter"(p/n 1402700250), $15.00 plus a small amount of A/T fluid at a total cost of $150 US. I told him to go ahead and do it. Note: you want to wait till the exhaust cools down before you put your hand into this area otherwise you may burn yourself.

Afterwards he showed me the part and explained that the O-ring's can go bad and not only allow a small amount of oil to the ground but A/T oil can go up the electrical cable to the transmission control module (TCM) and damage it. So it is a smart thing to get addressed ASAP. This 2000 car had 25K miles.

NEW p/n 2035400253 - A/T Plug Adapter (Conductor Plate Connector) - MSRP $14.50

OLD p/n 1402700250 - A/T Plug Adapter (Conductor Plate Connector) - MSRP $8.50

"It'is held by a bolt centered in the connector. This is after pulling out the actual electric plug. The 7mm connector bolt is attached to the housing so there's no risk of dropping it. In other words, the new part comes with the bolt and makes it very easy to figure out once you've bought the new part."

Please read Transmission Fluid Leak: Connector?

Please see the attached TSB - Technical Service Bulletin
Auto Trans - 722.6 Oil Leaks From Electrical Connection _ T-B-27.00/48e _ 19-Jan-07


Please see http://www.europeantransmissions.com...ages/722.6.gif
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Last edited by lynns; 12-06-2012 at 12:44 AM.
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#2 (permalink) Old 04-27-2007, 04:06 PM
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Originally Posted by lynns
My wife noticed a couple of quarter size drops of oil on the garage floor. The first INDY I went told me that I needed to relplace the "electrical conductor plate" within the transmission at $675-$750 US.

The next INDY I went to showed me that I needed to replace the "A/T Plug adapter"(p/n 1402700250), $13.00 plus a small amout of A/T oil at a total cost of $150 US. I told him to go ahead and do it.

Afterwards he showed me the part and explained that the O-ring goes bad and not only allows small amounts of oil to the ground but A/T oil can go up the electrical cable to the ECU and damage it. So it is a smart thing to get addressed ASAP. This Y2K car had 25K miles.

Hey Lynn’s

How did you get on with your gearbox? Did you manage to replace the A/T adaptor as described in your post and make good of all issues.

I notice also you have reached Veteran status inside of 10 months, congratulations on that.

A true asset to the Club.

Regards FLC2006

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#3 (permalink) Old 04-27-2007, 05:31 PM
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Hey Lynn’s

How did you get on with your gearbox? Did you manage to replace the A/T adaptor as described in your post and make good of all issues.

I notice also you have reached Veteran status inside of 10 months, congratulations on that.

A true asset to the Club.

Regards FLC2006
Thanks for the kind words.

Yes, the A/T plug adaptor has been replaced with the p/n stated above and no more minor leakage.

Last edited by lynns; 04-07-2012 at 12:41 PM.
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#4 (permalink) Old 04-27-2007, 06:55 PM
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Originally Posted by lynns
Thanks for the kind words.

Yes, the A/T plug adaptor O-Ring has been replaced with the p/n stated above and no more minor leakage.

How's that beautiful metallic car of yours doing? How many kilometers does she have at this time?
Hi Lynn

I have covered just over 44,000 miles now, man I love these cars.

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#5 (permalink) Old 04-27-2007, 09:31 PM
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Hi Lynn

I have covered just over 44,000 miles now, man I love these cars.
With only 1,164 SL600's made Worldwide in 1997 my guess is that you have a one of kind in the UK.

http://www.benzworld.org/forums/2247078-post2.html

Last edited by lynns; 04-07-2012 at 12:41 PM.
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#6 (permalink) Old 12-30-2007, 06:31 PM
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Cool you ARE da man, ya know!

THX
B

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#7 (permalink) Old 02-13-2009, 02:30 PM
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Hey, I know this post has been done for quite a while now. But I was wondering if anyone knew where I can get my hands on those two o-rings mentioned above? My 95 SL320 is leaking, seems as if its the same issue. The ATF spreads underneath my car as I'm driving and when my pan/exhaust get hot it starts smoking in and outside of the car. (Freaked me out the first time it happened! Haha)

But yeah, any help would be very appreciated!

P.S. newly registered, but I've been reading this forum for years! Love it!
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#8 (permalink) Old 02-13-2009, 02:34 PM
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Originally Posted by slninja View Post
Hey, I know this post has been done for quite a while now. But I was wondering if anyone knew where I can get my hands on those two o-rings mentioned above? My 95 SL320 is leaking, seems as if its the same issue. The ATF spreads underneath my car as I'm driving and when my pan/exhaust get hot it starts smoking in and outside of the car. (Freaked me out the first time it happened! Haha)

But yeah, any help would be very appreciated!

P.S. newly registered, but I've been reading this forum for years! Love it!
The O-rings are not separately available, buy the new and improved connector noted above and it comes with them. There is a DIY in the W210 forum help stickies on this replacement, I did it myself in about 45 minutes from time I got out the jack until the time I was washing my hands. Not difficult but the higher you raise the front end, the less fluid will leak out while you have the connector out.

Take care and enjoy the ride,
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#9 (permalink) Old 02-13-2009, 02:38 PM
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Well, LynnS had provided the P/N, just take that to the Dealer and ask for it. Or get them online, but I have a feeling the Dealer would be cheaper when you don't have to pay shipping.
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#10 (permalink) Old 02-13-2009, 02:48 PM
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Quote:
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Well, LynnS had provided the P/N, just take that to the Dealer and ask for it. Or get them online, but I have a feeling the Dealer would be cheaper when you don't have to pay shipping.
I tried looking up the part numbers online before posting. Unfortunately, the only website that had them is from New Zealand. The shipping is 5x the price of the actual O-ring.

Anyway, the reason I want to know the sizes before I go to a dealer is because I have a stack load of O-rings that may fit and rather use instead.

Thanks!
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