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-   -   Rough thunk when accelerating... (https://xoutpost.com/bmw-sav-forums/x5-e70-forum/80159-rough-thunk-when-accelerating.html)

Damager 03-22-2011 01:42 PM

Rough thunk when accelerating...
 
I'm new with the E70, having driven an E53 for several years.

I think the E70 has a feature that puts the car into "Park" when you are stopped at a light or at a stop sign. It seems like when I start to accelerate from a stop like this, the transition to accelerator happens with a "thunk" or rough shift point. It doesn't happe every time, but it probably happens 25-30% of the time.

Is this normal?

Also - why do you have to pull the door handle twice when exiting from the drivers seat?

MRV99 03-22-2011 02:37 PM

Are you talking about the Auto Hold feature? Does the thunk happen right when you start or after it accelerates and then shifts?

Damager 03-22-2011 02:41 PM

It happens right as I start. It might be the AutoHold. Seems pretty rough however. Can I disable AutoHold using the button on the console?

ard 03-22-2011 05:16 PM

I seem to recall Weasel posting about some known issues with this...

Damager, do an 'advanced search' with username Weasel, and try some related search terms (autohold or brake or think or brake release or TSB or SIB)

A

MRV99 03-22-2011 05:18 PM

Yes. Next to the shifter there is a button that says Auto H. You can read about how it works in the manual. I have use it before and I don't recall a thud when starting. You may need an update on your trans software but I don't remember reading about this issue before

Damager 03-22-2011 05:59 PM

Thanks all -

I did find a post on something related with Weasel involved - here:

http://www.xoutpost.com/bmw-sav-foru...lfunction.html

I'll do some more research on Autohold.

Damager 03-22-2011 06:05 PM

This looks like the answer I was looking for:

http://www.xoutpost.com/bmw-sav-foru...ight-bump.html

TorontoKhan 03-23-2011 12:00 AM

My 2008 doesn't bump with Auto-Hold and I use it more often then probably anyone in the world, since I drive on the worlds most busiest highway, 401, Toronto, Canada. So I think it differs from SAV to SAV (quality control issue most probably).

And to answer why do you have to pull the door handle twice to open the door....well the first time you pull it, it unlocks your door and the 2nd time it opens it up. You have to "pull twice" only once on any door, any it will open all doors automatically (unless you have setup the door locks to Driver door only).

rh71 03-23-2011 04:27 PM

Quote:

Originally Posted by Damager (Post 813601)
This looks like the answer I was looking for:

http://www.xoutpost.com/bmw-sav-foru...ight-bump.html

that was me, but I think you're talking about 2 different issues here.

When I use auto-hold and stop, it will "catch" the parking brake when fully stopped. When I go, there's sometimes an audible sound when it releases.

The issue you linked to above, is a thump that you can actually feel - a slight jolt (which happens on brake release, not necessarily acceleration). A programming helped that one.

The auto-hold sound I've taken as normal.


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