[E70X5M35i]

Originally Posted by gofast182

I got to spend some quality time with the X5 over the weekend as we went on a small trip. I thought I noticed this before but now I'm sure I do: under braking the downshifts in comfort mode are perceptible and sometimes harsh. Even in my 340i xDrive (which in theory has the "same" powertrain) the downshifts under braking are smoother even in Sport or Sport+.

Has anyone else noticed this? Is it something that will improve with time? Is anyone aware of a TCM software update?

Also I notice that when the idle stop is on and you're decelerating to a stop it tends to jerk the car to a stop more than if it's off. It's not violent or anything but I notice it and passengers may think I'm stopping short.

Have you found a soln?

[laxdad]

I have the exact issue with my 2019 X5. I also get a slight vibration when i turn left or right from a stopped position. Has anyone else had the sane problem.

[MJBradley1967]

I missed this thread before. I started having what sounds like the same issue last December, 7 months after I got it.

It started downshifting multiple gears, very noticeably, when slowing & stopping with the brakes, no manual downshifting.

Of course the dealer said it was "normal behavior" despite it not happening for 7 months.

[mmm50i]

Originally Posted by Raikkonen

The transmissions are different....they're 8-spd. transmissions built by ZF, yes, but their ratios are different, including final drive.

Wow, I wasn't aware of this! I looked into it and this is 100% correct

[E70X5M35i]

Originally Posted by MJBradley1967

I missed this thread before. I started having what sounds like the same issue last December, 7 months after I got it.

It started downshifting multiple gears, very noticeably, when slowing & stopping with the brakes, no manual downshifting.

Of course the dealer said it was "normal behavior" despite it not happening for 7 months.

ya sounds like you're describing what most of the people on this thread have mentioned. When coming to a stop, it down shifts and they're not really that smooth, it's noticeable..

[MJBradley1967]

Originally Posted by E70X5M35i

ya sounds like you're describing what most of the people on this thread have mentioned. When coming to a stop, it down shifts and they're not really that smooth, it's noticeable..

I might have bought the dealer's malarkey if it had been doing it since I picked it up.

Odds are the rough downshifting may break the transmission at some point, and they'll get the chance to replace it

[gofast182]

Originally Posted by laxdad

I have the exact issue with my 2019 X5. I also get a slight vibration when i turn left or right from a stopped position. Has anyone else had the sane problem.

Different issue than is being discussed here with the trans. but yes. They replaced the transfer case fluid with a different type of fluid and it greatly reduced this behavior. It's not 100% gone but almost not worth mentioning.

[E70X5M35i]

Originally Posted by gofast182

Different issue than is being discussed here with the trans. but yes. They replaced the transfer case fluid with a different type of fluid and it greatly reduced this behavior. It's not 100% gone but almost not worth mentioning.

what fluid did you put in?

[E70X5M35i]

bump. anyone else experience this? any resolution? seems to be happening to various owners..

[finn123]

Originally Posted by E70X5M35i

bump. anyone else experience this? any resolution? seems to be happening to various owners..

That was what I had when I had this damn car

https://g05.bimmerpost.com/forums/sh....php?t=1868883

[postbox1918]

I noticed that thing too but i may be wrong but for me the car use to hard shift when i was little hard on gas paddle instead of going very smooth on gas during stop and go or if I was driving on freeway slightly aggressive way and when merge into slow moving traffic then car shift hard , again may be I'm wrong but it feels like car remember the way you were driving and it takes the overall trip driving experience and transmission behave according to that and in stop and go it doesn't change .
I usually drive my car with ACC on freeway even or in city coz ACC and UCC works perfectly for me and shifts were normal, only use to act hard during manual driving and little aggressive , but since i tuned the transmission with xhp now in stop and go transmission automatically use 2nd gear to launch from complete stop so now its more smooth.

[bagd0003]

Originally Posted by E70X5M35i

what fluid did you put in?

Transfer case SIB with the details can be found here: https://static.nhtsa.gov/odi/tsbs/20...76367-9999.pdf

Basically need to start by replacing the fluid.

[E70X5M35i]

Originally Posted by bagd0003

Transfer case SIB with the details can be found here: https://static.nhtsa.gov/odi/tsbs/20...76367-9999.pdf

Basically need to start by replacing the fluid.

The SIB says "Situation: There is a jerking or shuddering during either or both of the following:
Cornering or accelerating from low speeds
Driving with low to medium loads"

This is not what's happening though. It's when the car's are slowing down and coming to a stop.. not when accelerating

[bagd0003]

Originally Posted by E70X5M35i

The SIB says "Situation: There is a jerking or shuddering during either or both of the following:
Cornering or accelerating from low speeds
Driving with low to medium loads"

This is not what's happening though. It's when the car's are slowing down and coming to a stop.. not when accelerating

I know this is not your issue. You were asking about which fluid to use in the transfer case, so I pointed you to the SIB that has all the info.
Cheers!

[Guy Fleegman]

Originally Posted by E70X5M35i

The SIB says "Situation: There is a jerking or shuddering during either or both of the following:
Cornering or accelerating from low speeds
Driving with low to medium loads"

This is not what's happening though. It's when the car's are slowing down and coming to a stop.. not when accelerating

Mine has started doing this too. Almost like I'm lightly tapping the brakes. Not so noticeable that I'm taking it to the dealer...yet.

(2022MY 45e @ 12,000 miles)

[goangaus]

Did anyone found a solution? I have the same issue on my X3 G01 30i, dealer say it is normal, unbelivable... cannot reproduce it though... it happens sometimes not everytime, mostly in traffic conditions. Did anyone found a way to reproduce it and denonstrate it to the dealer?

[bagd0003]

I wonder if resetting the transmission adaptations would help. It takes less than a minute with nothing to loose. Someone would have to search for the exact process, but I think you just hold the gas pedal down for about 30 seconds or so in ACC mode (probably Diagnostics mode on the G-series cars).
Maybe someone could try it and report back with the results, which should be felt immediately .

[goangaus]

I did a software update and this resetted also gearbox adaptations but did not helped. I had a road test with local BMW dealer and they said that this is normal car behavior. Stupid, if all BMWs would have this behavior this brand would not be so sold and loved.
Then I had a discussion with an independent gearbox specialist and he told me he saw similar simptoms on some ZF8HP gearboxes, it happens randomly, it cannot be reproduced and may be caused by a faulty valve body. I scheduled a road test with him next week to feel the gearbox although I do not know if the downshift while slowing down will be noticeable. Will keep you updated.

[E70X5M35i]

Originally Posted by goangaus

I did a software update and this resetted also gearbox adaptations but did not helped. I had a road test with local BMW dealer and they said that this is normal car behavior. Stupid, if all BMWs would have this behavior this brand would not be so sold and loved.
Then I had a discussion with an independent gearbox specialist and he told me he saw similar simptoms on some ZF8HP gearboxes, it happens randomly, it cannot be reproduced and may be caused by a faulty valve body. I scheduled a road test with him next week to feel the gearbox although I do not know if the downshift while slowing down will be noticeable. Will keep you updated.

thanks! keep us updated

[E70X5M35i]

Originally Posted by goangaus

I did a software update and this resetted also gearbox adaptations but did not helped. I had a road test with local BMW dealer and they said that this is normal car behavior. Stupid, if all BMWs would have this behavior this brand would not be so sold and loved.
Then I had a discussion with an independent gearbox specialist and he told me he saw similar simptoms on some ZF8HP gearboxes, it happens randomly, it cannot be reproduced and may be caused by a faulty valve body. I scheduled a road test with him next week to feel the gearbox although I do not know if the downshift while slowing down will be noticeable. Will keep you updated.

update on the road test?

[cobramite]

I noticed downshifting in our previous M50i but not yet in the M60i.
Previous Cayenne had it and pretty bad at times.

[Ckochese]

I have the same thing with my 24 40i. I just figured it was the stupid regenerative braking and part of the 48v hybrid nonsense. Seems to smooth out after driving a few miles but very pronounced early in a trip. This issue coupled with the annoying ASS, which I can defeat using tips found on another thread, almost make me want to trade this in on something else. It’s obnoxious and the lack of refinement in a 75k vehicle is piss poor. It just looks so damn good…….