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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Dealer transmission service



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      12-02-2012, 09:54 PM   #1
BoostaVita
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Dealer transmission service

Hi, I have the dreaded transmission leak and dealer quoted me 600 to replace mechatronic sleeve and transmission gasket. Do they drain and refill transmission fluid or just top off the lost fluid after service? For that price, shouldn't they drain and replace with fresh fluid? Anyone with experience please let me know. TIA
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      12-02-2012, 11:00 PM   #2
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First of all this is not a hard repair. You drain the pan (that is what they will do and keep the old fluid), pull the pan and install the sleeve. Reinstall the pan and refill the pan with the same old crap LifeGuard 6.
May I ask how many miles are on your car?
If this was my car I would tell BMW you will supply new LG6 equivalent (Mercon SP) and be happy. Mercon SP (and I was skeptical until I had Blackstone run oil analysis for me) is the same product with different color and smell as is LG6.
Turkeybaster has run his car on Mercon SP for a number of years now after concluding the same thing.

Also you have an ix right? If so when was the transfer case fluid changed? It is WAY more important than any fluid in your entire car. It holds a robust (yes sarcastic) 0.6L of special fluid only sold by BMW and is easy to change. All your power goes through that transfer case and it should be changed (according to Mike Miller who writes for both Roundel and Bimmer Mag) every 30K miles. That seems too often but 40-50 doesn't. If you think 600 bucks is expensive what until your transfer case gives it up.

Unless you really are using the dealer for a specific reason take this to a good indy BMW shop and give them 6 quarts of Mercon SP to refill the transmission with. Also have them change the transfer case and ask them to give you the 1L container back because you can only get 0.5L out thus leaving you the correct amount for another change. That stuff is 70 bucks a L. Mercon by the way is 5.99 now at O'Rielly Auto Parts.
If you need LG6 here is a good supplier.
Here is a DIY to help you out the only thing that was not known at this time was that Mercon SP is equivalent to LG6
http://www.e90post.com/forums/showth...ansmission+pan

LG6 is here
http://www.thectsc.com/index.php?p=p...d=184&parent=0

Hope this helps you save some money and extend your transmission and transfer case life...
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      12-02-2012, 11:35 PM   #3
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Greatly appreciate the info. My car has 117k. Part of the job I am scared about is replacing the mechatronic sleeve. I called my independent and they are not comfortable handling it (may need special tool, something about leaving 3mm gap when reinstalling??) BTW, by transfer case do you mean the differential case?
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      12-02-2012, 11:41 PM   #4
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Is there a specific diagram that shows the location of the mecha sleeve in relation to transmission case? ( is it above the fill plug?)
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      12-03-2012, 03:59 AM   #5
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heres the diagram you wanted.



here... these guys sell the parts... make sure the part I linked to is right for your tranny though....http://www.thectsc.com/index.php?p=p...id=3&parent=10

and then download the attachment I have put on this post.
Attached Images
File Type: pdf 6_speed_sleeve_replacement.pdf (239.3 KB, 31 views)
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      12-03-2012, 07:33 PM   #6
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Great info. Thanks a lot.
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      12-03-2012, 09:24 PM   #7
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hey thats a really good price... i was quoted 900 without tax... I did end up doing it myself but it was a serious pain in the ass especially removing the sleeve seal since there is very limited space... that itself took me about 8 hours to do...
Bmw doesn't change the fluid, because if you look at the transmission pan theres a sticker saying that its lifetime fluid... if you do decide to do it be careful... good luck!
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      12-03-2012, 10:20 PM   #8
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Additional info.....................
Attached Images
File Type: pdf BMW Mechatronic DIY.pdf (511.9 KB, 33 views)
File Type: pdf BMW Mechatronik Seal TSB 24 08 06.pdf (149.1 KB, 28 views)
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