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      10-07-2014, 11:49 AM   #1
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Found leak in dct transmission

Hi there, when i changing xpipe i found something strange in my transmission cartridge or side seal of my transmission. is anyone ever encounter this problem?is my transmission have leak oil? Is it normal or this serious problem?


Last edited by dry87; 10-07-2014 at 12:04 PM.
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      10-07-2014, 11:58 AM   #2
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      10-07-2014, 12:03 PM   #3
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A leak is never normal, and yes this is a common persistent problem with DCT.
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      10-07-2014, 01:14 PM   #4
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the dealer asked me to change

it cost me around $1250 if i convert to USD
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      10-07-2014, 01:34 PM   #5
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$1250?
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      10-07-2014, 02:00 PM   #6
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Quote:
Originally Posted by m3ray View Post
$1250?
sorry my bad is cost me $600, $1250 is with other stuff

heres detail
oil pan $230
suction filter $100
gasket $75
hydrolic c (i don't know what this is) $390
oil DCTF-1 $40
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      10-11-2014, 11:19 AM   #7
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That is just the lower pan. The side pan ALSO leaks, and BMW calls for transmission removal to do it. Replace the lower pan, side cover plate, side cover gasket, refill with fluid, and cleanup the oily mess on your trans and undertray runs well over $2500 at a dealer. I see the OP is in Jakarta, Indonesia, so our US prices mean nothing to him.

This is VERY COMMON on all DCT transmissions. We replace them all the time, now. Even a Z4 with only 40k miles was leaking all over the place. BMW makes awesome cars, but they can't seal an engine to save their lives! It's unbelievably pitiful how many oil leaks crop up on BMW engines. Other companies design and supply the gaskets, but BMW uses the same companies that Audi and other manufacturers use, so why do BMW engine gaskets suck so badly? It's baffling.
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      10-13-2014, 10:34 PM   #8
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Hopefully this helps
http://www.m3post.com/forums/showthread.php?t=824598
Post 65
http://www.m3post.com/forums/showpos...1&postcount=65
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      10-14-2014, 03:07 AM   #9
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Quote:
Originally Posted by JamesM3M5 View Post
That is just the lower pan. The side pan ALSO leaks, and BMW calls for transmission removal to do it. Replace the lower pan, side cover plate, side cover gasket, refill with fluid, and cleanup the oily mess on your trans and undertray runs well over $2500 at a dealer. I see the OP is in Jakarta, Indonesia, so our US prices mean nothing to him.

This is VERY COMMON on all DCT transmissions. We replace them all the time, now. Even a Z4 with only 40k miles was leaking all over the place. BMW makes awesome cars, but they can't seal an engine to save their lives! It's unbelievably pitiful how many oil leaks crop up on BMW engines. Other companies design and supply the gaskets, but BMW uses the same companies that Audi and other manufacturers use, so why do BMW engine gaskets suck so badly? It's baffling.
should i change Hydraulic Cover- 28607842855 ? or only gasket will be enough
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      10-14-2014, 08:16 AM   #10
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Quote:
Originally Posted by JamesM3M5
BMW makes awesome cars, but they can't seal an engine to save their lives! It's unbelievably pitiful how many oil leaks crop up on BMW engines. Other companies design and supply the gaskets, but BMW uses the same companies that Audi and other manufacturers use, so why do BMW engine gaskets suck so badly? It's baffling.
Or a transmission in this case. :

The other companies have plenty of leaks as well. When a Mercedes has a transmission leak from their trans harness sealing sleeve, it works its way up the wiring into the transmission control unit and takes it out. Without any signs of external leakage. I'd call that a problem.
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      10-14-2014, 10:00 AM   #11
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Quote:
Originally Posted by dry87 View Post
should i change Hydraulic Cover- 28607842855 ? or only gasket will be enough
Depends on what is leaking. Changing the side gasket requires dropping the tranny. Not sure if you want to go that far if it's not leaking..
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      10-15-2014, 09:51 AM   #12
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Quote:
Originally Posted by tinman831
Quote:
Originally Posted by dry87 View Post
should i change Hydraulic Cover- 28607842855 ? or only gasket will be enough
Depends on what is leaking. Changing the side gasket requires dropping the tranny. Not sure if you want to go that far if it's not leaking..
The leak that i found like i show u in the pic, how to see side gasket of transmission ?
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      10-23-2014, 04:24 PM   #13
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I have just purchased a 2005 E92 M3 and took the car in for an oil service at 62,00km.

The technicians noticed similar leaks, as discussed, to the DCT transmission sump. The problems is the oil seals fail and BMW do not manufacture these separately. Therefore, you have to purchase an entire new sump/panel.

Picked up the car yesterday. No difference in performance.
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      10-23-2014, 04:33 PM   #14
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Quote:
Originally Posted by W9 E92M3 View Post
I have just purchased a 2005 E92 M3 and took the car in for an oil service at 62,00km.

The technicians noticed similar leaks, as discussed, to the DCT transmission sump. The problems is the oil seals fail and BMW do not manufacture these separately. Therefore, you have to purchase an entire new sump/panel.

Picked up the car yesterday. No difference in performance.
2005 E92 that's one of kind!
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      05-04-2016, 07:33 PM   #15
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Apologies for reviving an old thread but figure this was the best way of trying to find a solution.

My buddy's 2009 E92 M3's (DCT) transmission started leaking fluid few days ago. Took it to a indy who said to take it to dealership and they will probably end up replacing the tranny. Took it to another reputable indy in the area who took apart the tranny for diagnosis (10 hour labor). He found some BMW bulletin that recommends changing the flywheel for this leak but he thinks it will fix the leak but can't guarantee it won't come back.

After doing some searching I haven't been able to find any info on this and was hoping someone here can chime in. Unfortunately, this is all the info I have right now. I am going to try and get a hold of shop tomorrow and try to get some more details.

Thanks.
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      05-04-2016, 09:32 PM   #16
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I've never seen any mention about changing a flywheel (do DCT's even have traditional flywheels?) but I'm not a DCT expert by any means.

I'd be worried that your indy knows enough about DCT's to accurately diagnose the true issue. I definitely would make sure before they put things back together and fill it with fluid, that they use the CORRECT fluid. Make sure they know and see the bottles in hand PRIOR to fill. If not... well ask Helmsman about the hassle you'll face!
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      05-04-2016, 09:58 PM   #17
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Quote:
Originally Posted by BzsBimmer View Post
I've never seen any mention about changing a flywheel (do DCT's even have traditional flywheels?) but I'm not a DCT expert by any means.

I'd be worried that your indy knows enough about DCT's to accurately diagnose the true issue. I definitely would make sure before they put things back together and fill it with fluid, that they use the CORRECT fluid. Make sure they know and see the bottles in hand PRIOR to fill. If not... well ask Helmsman about the hassle you'll face!
This whole flywheel thing is what's throwing me off too. Hoping to get some more info about this bulletin tomorrow.

Anyone have a subscription for https://www.bmwtis.com/ to check for bulletins?
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      05-04-2016, 10:08 PM   #18
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Did some googling... apparently there is a dual mass flywheel in the DCT. I still can't see how the flywheel can cause the leak but that's why I'm not a BMW Engineer or BMW Tech lol

All of the DCT leaks have been resolved by changing out the gaskets for the most part.
Do a search for SSPKris threads on the DCT. They are extremely knowledgable.
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      05-04-2016, 10:23 PM   #19
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Hey thanks for the response. It's my car, he basically said something along the lines of the flywheel causing the tranny to shake? That's what the bulletin was. I'm gonna call him in the morning and see if he can give me the bulletin number. Any response until then would be appreciated, as he wants me to make a decision on replacing the flywheel or not fairly quickly.
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      05-04-2016, 10:53 PM   #20
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Quote:
Originally Posted by edcampos View Post
Hey thanks for the response. It's my car, he basically said something along the lines of the flywheel causing the tranny to shake? That's what the bulletin was. I'm gonna call him in the morning and see if he can give me the bulletin number. Any response until then would be appreciated, as he wants me to make a decision on replacing the flywheel or not fairly quickly.
Get in touch with SSPKris
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      05-04-2016, 11:16 PM   #21
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I literally just got back in town from getting a DCT leak fixed.
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      05-05-2016, 10:06 PM   #22
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Quote:
Originally Posted by edcampos View Post
Hey thanks for the response. It's my car, he basically said something along the lines of the flywheel causing the tranny to shake? That's what the bulletin was. I'm gonna call him in the morning and see if he can give me the bulletin number. Any response until then would be appreciated, as he wants me to make a decision on replacing the flywheel or not fairly quickly.
Please let me know if you find the Service Bulletin number for this. I was also told that there was a TSB for the DCT gasket. Searching for the number now ...
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