DCT transmission acting weird!

[andrewsmith335i]

A couple days ago, I took an awkward u turn in my m3 and it gave me a transmission malfunction. Fast forward to today and I was just cruising down the highway and I got the same message and the car would seemingly only go into even gears 2,4,6. I turn the car off and back on again and it's all fine, have all 7 gears and drives completely normal. Is this a software issue? Any help is appreciated!

[4130]

The first thing I'd do is a transmission fluid change, along with the gasket. You may just be low on fluid.

[BeaterM3]

Originally Posted by andrewsmith335i

A couple days ago, I took an awkward u turn in my m3 and it gave me a transmission malfunction. Fast forward to today and I was just cruising down the highway and I got the same message and the car would seemingly only go into even gears 2,4,6. I turn the car off and back on again and it's all fine, have all 7 gears and drives completely normal. Is this a software issue? Any help is appreciated!

Mine did this back last Nov. Scanned the car, ended up being a faulty mech unit. Had to do a full trans swap. Not saying this is your problem but I would at least scan for codes.

[neilum]

Originally Posted by andrewsmith335i

A couple days ago, I took an awkward u turn in my m3 and it gave me a transmission malfunction. Fast forward to today and I was just cruising down the highway and I got the same message and the car would seemingly only go into even gears 2,4,6. I turn the car off and back on again and it's all fine, have all 7 gears and drives completely normal. Is this a software issue? Any help is appreciated!

My car did this exact thing only forward gears 2, 4 and 6 very repeatedly. It only ever happened when the car was cold, and I don't mean as in the engine being cold, I mean cold outside, in the winter, below about 25 degrees.

When it used to happen I would just shut the car off, turn it back on and it went away completely until the next sub 25 degree day upon first startup.

I tried a fluid change, adjusting the adaptations in the DCT software, but nothing fixed it until I flashed the DCT with GTS tune.

Since the tune it's never once happened again.

I would try the first two things I said above, and maybe a tune or re-flash. Autocouture tried everything they knew but couldn't fix it. To this day I am not sure what the issue was but the DCT is totally fine to this day, 93K miles now.


All that said, if you are still running the stock DCT software/tune, I would flash it anyway because it is a pile of steaming crap compared to the GTS file.

[tbuck]

Originally Posted by andrewsmith335i

Hit a piece of road debris and lost quite a bit of fluid...

I would guess this had something to do with it. Sucks but it happens

[ATLIEN]

Originally Posted by BeaterM3

Mine did this back last Nov. Scanned the car, ended up being a faulty mech unit. Had to do a full trans swap. Not saying this is your problem but I would at least scan for codes.

Same here. Did the new pan, mech unit and that didn't work. Had to swap out the entire transmission. Wasn't a fun experience. No issues since.