6Hp26 harsh 2-1 downshift - possible solution (at least one of them)

[Clockwork]

edogg, did the person who did the software update also reset your adaption values? if so that makes the vehicle feel a bit "newer" in the tranny dept. It will go back to how it was after a few thousand miles...

[Plattus1000]

DORU-
Thank you. Had the new software done, pimp'n shift'n baby.

[edogg]

Originally Posted by Clockwork

edogg, did the person who did the software update also reset your adaption values? if so that makes the vehicle feel a bit "newer" in the tranny dept. It will go back to how it was after a few thousand miles...

If resetting the adaption values is part of the normal software update process, I would guess that they did. But that would make sense.

I also noticed that I've lost a couple of MPG. Granted, I sat idling in heavy traffic a bunch a couple days ago but my usual 16mpg is down to 14mpg.

[jfoj]

Originally Posted by edogg

If resetting the adaption values is part of the normal software update process, I would guess that they did. But that would make sense.

I also noticed that I've lost a couple of MPG. Granted, I sat idling in heavy traffic a bunch a couple days ago but my usual 16mpg is down to 14mpg.

Even if adaptations were not reset, they are "adaptations" they constantly change and adjust as needed. Resetting "adaptations" are more for shops what make a repair and want to see how the vehicle runs immediately after the repair rather than having the customer drive the car for a number of days.

As far as MPG, when you sit still in traffic and idle the vehicle gets EXACTLY 0 MPG which will VERY QUICKLY drive the Average MPG into the ground.

I never want to discuss MPG unless I can keep the vehicle over 55 MPH for long periods of time. I also reset the Average MPH (Hour) at each fill up and monitor the Average MPH carefully. As the Average MPH goes down, so does the MPG.

[Clockwork]

Hi all again, I know Doru told us a third step we need to do after
the Software flash & DSC update (and mandatory steering angle sensor calibration)
then adaption reset (whether by key and gas pedal or software reset)
but the third process, as told to me from my BMW mech, is similar, but longer than Doru showed in another post, and is as follows.
Find a LONG empty stretch of road to achieve next “break-in” step.
12. Accelerate through the gears 0-5/6 (top gear) BUT slowly, letting the tranny shift at or under 2,000 rpm. After you get to 6th gear for 15 seconds, still under 2,000 RPM, let off the throttle and coast back to a stop (you can hit brakes to actually stop vehicle once you get to 10km/h). Keep the vehicle in a dead stopped position for 15-20 seconds.
13. Repeat step 12 4 more times and then park vehicle. Turn off.
14. You are now finished the 2/3 steps it takes to properly reflash your tranny software/ reset adaption values.

[thrillcat]

I had this update done yesterday (delayed while I sorted out rear air suspension issues) and it seems to have smoothed out my shifting. I was having an issue where in normal shifting mode, if I wasn't really getting after it, it felt like it was shifting into 4th immediately after the shift to 3rd, really sucking the power until it got up to speed. It also had the rough 2-1 downshift in Sport shifting mode.

The update seems to have solved my issues. Not bad for $95 of shop time.

[X5M-ISH]

Originally Posted by Doru

My X was driving really good, and about 2 weeks ago it started this 2-1 hard downshift/upshift but only with stone cold engine & transmission.

Bringing up this older thread may be relevant to others and not just myself, who are experiencing the same issues. My truck is going in next week for a faulty transmission parking pin which causes a run away vehicle if parked on an incline. My truck is a 02/06 make which falls outside the dates in the SIB the OP posted, but has the same transmission and the same issues. I’d like to see if BMW can get someone to flash the tranny software while it’s in their shop. Else, if I understand the OP correctly, I can do it myself with INPA?

[Overboost]

Originally Posted by X5M-ISH

Bringing up this older thread may be relevant to others and not just myself, who are experiencing the same issues. My truck is going in next week for a faulty transmission parking pin which causes a run away vehicle if parked on an incline. My truck is a 02/06 make which falls outside the dates in the SIB the OP posted, but has the same transmission and the same issues. I’d like to see if BMW can get someone to flash the tranny software while it’s in their shop. Else, if I understand the OP correctly, I can do it myself with INPA?

You can flash the EGS with WinKFP providing you have the latest daten files containing the latest firmware for your transmission. INPA will not do this, WinKFP will. INPA and WinKFP are in the same software suite. (BMW Software Tools)