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09-18-2012, 12:46 AM | #1 |
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DIY: Changing M-DCT Fluid
I realize that this is long overdue, but here it is!
Important Let your car cool for an extended period of time (at least 4 hours depending on the ambient temperature) before starting the process. If the transmission's temperature is too high, an incorrect amount of fluid could be added. Fluid needed 83 22 0 440 214 BMW DCTF-1 (1L) 83 22 2 147 477 BMW DCTF-1 (20L) Special tools needed Fluid pump Thermometer/contact pyrometer Procedure 1. Remove the protective cover under the transmission. 2. Drain fluid by removing the plastic plug near the front passenger side of the transmission. Fluid can be extremely HOT! If your car was just driven, I would suggest waiting a few hours before draining the oil. 3. Once the fluid drain stops, reinstall the plug. Torque to the suggested value listed on the plug. 4. Open the filling hole (red box). Using a fluid pump, add M-DCT oil into the transmission. I added about 3 quarts before fluid started to emerge from the filling hole. 5. Ensure that M-DCT fluid inside the transmission is below 90 deg. F. Then, close the filling hole. 6. Turn on your engine. In position P, maintain 2000 rpm for about 1 minute. 7. Reopen the filling hole and add additional fluid (about 2 quarts) until fluid starts to leak out from the hole again. This process must be completed while the transmission fluid temperature is below 104 deg. F. 8. Close the filling hole and reinstall any removed panels. |
09-18-2012, 08:40 AM | #4 |
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I assume you would only recommend doing this for those who are outside the warranty period?
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09-18-2012, 08:58 AM | #5 |
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that 20L bottle is expensive!
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09-18-2012, 11:29 AM | #7 | |
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No perceivable difference.
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Yes to your second question. The oil change process is not detectable/traceable. |
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09-18-2012, 11:32 AM | #8 |
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09-18-2012, 11:53 AM | #9 |
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I recall you had the fluid tested from your car (http://www.m3post.com/forums/showpos...49&postcount=1) and the fluid was found to be in very good condition with 30k miles. With that in mind, why did you change it on the second vehicle? Have you continued to get the fluid tested and if so, have you found a point (i.e., mileage) where the degradation is noticeable?
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09-18-2012, 11:55 PM | #12 | |
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Talk to your dealer. Some offer discounts for car clubs such as BMWCCA and Houston M Club. |
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09-19-2012, 11:57 AM | #13 |
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This is pretty much the same procedure for changing the transmission fluid (partial change) in an X5, which is rated to 100,000 miles. Why the M3 DCT is "lifetime" while the X5 is 100k is beyond me.
Any suggestions as to when you think the fluid ought to be changed? Also, could you elaborate a little on how you measured the fluid temprature? Is it as simple as inserting the sensor into the fill-opening? Thanks for making this thread! |
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09-22-2012, 03:58 PM | #15 | |
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09-22-2012, 04:09 PM | #16 | |
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09-23-2012, 05:23 PM | #17 | |
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09-24-2012, 01:58 AM | #18 | |
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09-24-2012, 08:12 AM | #19 |
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Nice DIY. where is the fill hole located exactly?
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09-24-2012, 09:49 AM | #20 | |
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I would imagine that it would be a massive PIA to do it like that in the DCT. Pumping extra liters into the DCT would be tricky, time, consuming, and (if on jack stands) very tiring. If you get 5L of 7.8L by a simple drain and fill, that's good enough for me. My Mazda takes 6 qts of ATF, 3 of which is in the cooler and lines. So its worth it and its easy to add extra ATF in the dipstick tube.
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09-24-2012, 09:51 AM | #21 |
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09-24-2012, 03:00 PM | #22 |
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Thank you so much for this. Am planning on doing this during the winter as my car is beat pretty hard
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