2002 MB E320 - Another Tranny Issue - Page 9 - Mercedes-Benz Forum
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post #81 of 95 (permalink) Old 02-14-2019, 02:05 PM
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Quote:
Originally Posted by pdodee View Post
Thanks again for your help.

I'm going to pick up the car and hopefully get it home without too much trouble. I'll get the codes from my mechanic. This last time, today, the Check Engine Light did come on when I lost drive. That's why I drove it straight to the mechanic. He's convinced the clutches are shot and need a complete rebuild. But he also says the the transmission requires reprogramming if the conductor plate is replaced, so I think this might be getting too model specific for him. He's an awesome mechanic that has saved me thousands over the years, but he's not a Mercedes specialist.

I'll be looking into a nearby independent Mercedes garage nearby (Toronto).

As for the ESP light going on all the time: it was acting completely as expected given the conditions at the time (foot of snow and complete ice base). I just mentioned it because both transmission issues showed up under the exact same severe driving conditions 2 weeks apart.
Yeah, ask him to read the codes from the 38 pin diagnostic connector, and print it out for you to post here. If you have codes, do not replace anything without analysis first.

The conductor plate is just a conductor plate with speed sensors, plus start inhibit. There is no magic to it. No programming at all.

If the clutches are shot, no change of ATF and filter will bring them back to life for the time you drove with no problems.

Who installed the ATF filter ? Was it a genuine MB brand or some aftermarket stuff (which do not fit and function well) ?

ESP coming on is different from ESP MIL (fault) light coming on. The ESP does not engage in low speeds.

At least, get a an OBD2 scanner and retrieve the codes from the OBD2 port. This will give some clue on the transmission codes, but not from the traction modules.
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post #82 of 95 (permalink) Old 02-15-2019, 12:37 PM
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mrboca - Here are the codes the mechanic got today from his notes:

P2069 - Electronic Transmission ECU-N15/3 Error store in component
P2066
P2502 - Gear implausible or transmission slipping
P220A - The speed of Y3/6n2 to Y3/6n3 is excessive

The car drives and shifts fine when cold but starts to lose drive once it warms up. Just like 2 weeks ago, when new ATF and filter fixed the problem, I've started to hear whining again. It started very quietly and then the next day it got louder and that's when the trouble returned.

Here's a nugget I'm sure you'll jump on: he said the filter was aftermarket. Is it reasonable that a 2 week old filter would fail/cause problems so quickly? Also, when I get him to replace the filter with a genuine one would it make sense to get him to replace the 13 pin connector at the same time? Do any of these codes/symptoms point toward conductor plate, connector issues? He said the TCU was clean.

Finally, here are the codes that he got 2 weeks ago.

P0730, P2314, P2315, P2316, P2404, P2502, P2600, P2602, P220A (bolded the ones that have returned)

Thanks again for any and all help. He's convinced the transmission needs a rebuild at a transmission shop. If that's the only cure this car will be scrapped/sold
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post #83 of 95 (permalink) Old 02-15-2019, 01:43 PM
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The aftermarket filters (some, not all) tend to have tolerance problems with the neck+o-ring. Also, it could be an installation issue (failing to remove old-oring, not lubricating the oring with ATF prior to installation, etc). He can use the existing ATF, and the gasket, so what have you got to lose ? The genuine product is not that expensive.

The problem could be sucking air in the pan where the neck enters into the valve body due to poor fitting which may have become a problem due to vibration.

Regarding the the 13 pin plug adapter, order a genuine one just in case. The mechanic can remove the connector plug (not the adapter) and check for ATF contamination. If there is none, no need to replace.
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post #84 of 95 (permalink) Old 02-15-2019, 02:23 PM
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Would you consider Mann to be an acceptable aftermarket filter? Just seeing one on sale here...
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post #85 of 95 (permalink) Old 02-15-2019, 02:32 PM
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post #86 of 95 (permalink) Old 02-19-2019, 12:39 PM
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I'm going to go back and get the connector checked as well as have him take another look at the aftermarket filter he installed. I think I'll get him to replace both with genuine too. I just got a quote from the dealer up here in Canada and they're just C$25 and C$20 respectively (However the conductor plate is C$900!!).

I'm REALLY hoping this is just a faulty aftermarket filter because it doesn't make sense to me that the car ran fine for two weeks with just a filter and ATF change like gerrb experienced all those years ago.

Actually, gerrb, if you're reading this I've got a question. Way back in 2013 you made a post saying that you'd resolved the problem with just a filter/fluid change...
https://www.benzworld.org/forums/w21...ml#post5940913

And then you checked back in in 2017 with the same problem again, but this time you say that you've replaced the connector and conductor plate during the interim...
https://www.benzworld.org/forums/w21...l#post15400545

Can I ask what triggered that connector/conductor plate change? Did you find fluid in the connector and decided to do the plate at the same time or were you running into different problems? My problems are exactly the same as your original post ones on a 2002 E320 Wagon as well. It runs great other than this. I even had a complete suspension change done this summer because I planned on keeping her for awhile, but if the transmission is shot I can't really justify dropping another $3000 on a car that's approaching 20 years old.

Thanks for any help.
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post #87 of 95 (permalink) Old 02-19-2019, 01:39 PM
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When the mechanic drops the pan, make sure he checks for black specks and/or traces of coolant (ATF cooler issues in the radiator).
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post #88 of 95 (permalink) Old 03-13-2019, 12:42 AM
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Tranny replacement issues.... my 2001 E320 came with a 722.618 transmission which got bad. Now the replacement transmission has the serial number 722.633 220-270-11-00 which shows that it was planted in a 2000 on S500
https://www.fitzhughmedia.com/MBF/transtypes.html
my question is: what can the side effects be?

cc mrboca tabijan kajitek
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post #89 of 95 (permalink) Old 03-14-2019, 02:02 PM
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Originally Posted by Smartchoice View Post
Tranny replacement issues.... my 2001 E320 came with a 722.618 transmission which got bad. Now the replacement transmission has the serial number 722.633 220-270-11-00 which shows that it was planted in a 2000 on S500
https://www.fitzhughmedia.com/MBF/transtypes.html
my question is: what can the side effects be?

cc mrboca tabijan kajitek
mrboca pls help needed
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post #90 of 95 (permalink) Old 03-14-2019, 02:29 PM
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These 2 gear boxes are NOT interchangeable as gear ratio errors shall occur. One is 6 cylinders (small NAG) and the other is for 8 cylinders (Large NAG).

Similarly, TCMs are not interchangeable either, and will cause incorrect gear ratio problems.

Last edited by mrboca; 03-14-2019 at 02:32 PM.
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