DIY: Changing M-DCT Fluid

[Jbishaw]

Bump for the helpful DIY!

[Genes1s]

Did you guys re-use the 14 Torx bolts when installing the pan or get new ones?

[Audioslave686]

Originally Posted by Genes1s

Did you guys re-use the 14 Torx bolts when installing the pan or get new ones?

I reused mine

[E90Freedom]

Thanks for the DIY!

[Mimmer]

Jw what milage you have all done it at.

Hitting 83k no track days .... Just DD ...

Plan doing it closer 90k mark if not 100k

[Ximian]

Originally Posted by Mimmer

Jw what milage you have all done it at.

Hitting 83k no track days .... Just DD ...

Plan doing it closer 90k mark if not 100k

I think me was around 88k when I got the Slon pan. You should be able to see smoother shifts with fresh fluid, that's a great benefit for a daily driven car. I would do it sooner than later.

Engine oil change, DCT fluid, diff fluid, and spark plugs replacement is the ultimate tune up for a smooth daily.

[AndyW]

Originally Posted by Genes1s

Did you guys re-use the 14 Torx bolts when installing the pan or get new ones?

I did new.

[Andryuha]

I had a shop do this service (should have DIYd it) and I'm not sure it was done correctly because my transmission now shifts like dog $#!7. What's the easiest way to reset the adaptations? What's the best way of verifying the fluid level (open the fill plug and see if any fluid will come out?

[Binary420]

Originally Posted by Andryuha

I had a shop do this service (should have DIYd it) and I'm not sure it was done correctly because my transmission now shifts like dog $#!7. What's the easiest way to reset the adaptations? What's the best way of verifying the fluid level (open the fill plug and see if any fluid will come out?

Can you describe the issue with shifting you were or are experiencing?

I did this service, including the pan and filter, and now every time after starting from a complete stop, and only in 1st gear, (doesn't happen starting in 2nd gear) the car jerks forward as if I drove over a speed bump at 15 mph..
Then continues on driving fine, other than the fact it is also shifting hard... -like old crusty dog s%%t- hard

You can reset the adaptations by putting key in ignition, and turning on ignition without starting the engine.
With car powered on( gas Guage is up) hold down the gas pedal for 60 or so seconds, and with gas pedal still depressed, power off ignition and remove key.

Let car sit for 2-3 minutes then start engine

I know those directions definitely reset engine adaptations, not sure about transmission adaptations but worth a try

[Tommysalami]

Did this recently using the oil balancing procedure in ISTA. Just want to add that ISTA has a few menus that will read out the transmission temp, but the first couple pages' readings aren't updated live and will leave you there thinking the temp isn't going up even though you've got the engine on.

The first live updating temp reading will be when you get to the later menu that says there's max transmission cooling enabled. Once you've done the initial fill, just know to continue through the menus till you get to that page.

[Mimmer]

jw do you need to replace this? my shop was rec to doing it..
BMW Dual Clutch Transmission Oil Pump Filter - Getrag 28107850148

https://www.fcpeuro.com/products/bmw...ag-28107850148

[GORDON.M3]

Originally Posted by Mimmer

jw do you need to replace this? my shop was rec to doing it..
BMW Dual Clutch Transmission Oil Pump Filter - Getrag 28107850148

https://www.fcpeuro.com/products/bmw...ag-28107850148

Yes, replace this. The filter is old and replacing it would improve the filtration.

[spammysammich]

Tip: never re-use the filter cap, the o-ring will eventually harden up and go flat. The pressure filter was leaking bad enough that I would drop about three tablespoons of fluid at startup and God only knows how much I dribbled all over creation before I parked it in October.

[drwankel]

Originally Posted by spammysammich

Tip: never re-use the filter cap, the o-ring will eventually harden up and go flat. The pressure filter was leaking bad enough that I would drop about three tablespoons of fluid at startup and God only knows how much I dribbled all over creation before I parked it in October.

That is one flat o ring!