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-   -   Strange Shifting Behavior (http://www.bimmerfest.com/forums/showthread.php?t=660055)

halltristan 11-24-2012 08:56 AM

Strange Shifting Behavior
 
In my X3 I have an anomaly:

Sometimes, when traveling at low speed (10-35 mph) the vehicle seems to "stutter" while shifting from second to third gear. I'm not sure exactly how to explain it but it's almost if the car will shift up and down until I put my foot on the gas to force the gears to shift. While this occurs, the tachometer needle will go up, down, up, down right around the 2000 rpm mark.

This issue seems to happen rarely, perhaps once a week, and as soon as I speed up its fine. Moreover, it seems to happen when driving conservatively; If I drive a bit faster or aggressively I don't have any problem. Heat or cold doesn't seem to be a factor either; this strange behavior will happen on a 30 degree morning just as easily as a 70 degree afternoon. Lastly, other than this weird issue, the transmission and shifting is just fine.

What is everyone's thoughts on the issue? Has anyone experienced anything similar?

Evlengr 11-24-2012 05:14 PM

Quote:

Originally Posted by halltristan (Post 7211375)
In my X3 I have an anomaly:

Sometimes, when traveling at low speed (10-35 mph) the vehicle seems to "stutter" while shifting from second to third gear. I'm not sure exactly how to explain it but it's almost if the car will shift up and down until I put my foot on the gas to force the gears to shift. While this occurs, the tachometer needle will go up, down, up, down right around the 2000 rpm mark.

This issue seems to happen rarely, perhaps once a week, and as soon as I speed up its fine. Moreover, it seems to happen when driving conservatively; If I drive a bit faster or aggressively I don't have any problem. Heat or cold doesn't seem to be a factor either; this strange behavior will happen on a 30 degree morning just as easily as a 70 degree afternoon. Lastly, other than this weird issue, the transmission and shifting is just fine.

What is everyone's thoughts on the issue? Has anyone experienced anything similar?


Welcome to the dreaded GM6 AT issue.

Supercourse 11-24-2012 06:53 PM

Quote:

Originally Posted by Evlengr (Post 7212049)
Welcome to the dreaded GM6 AT issue.

But he has the 2006 5psd. A/T I believe.

From the following earlier thread it could be really hard to pin down, and not a transmission problem at all.

VANOS seals, MAF sensor, rear diff. and O2 sensors seem to be common suspects:

http://www.bimmerfest.com/forums/sho...d.php?t=483954

halltristan 11-24-2012 07:14 PM

Quote:

Originally Posted by Supercourse (Post 7212180)
But he has the 2006 5psd. A/T I believe.

From the following earlier thread it could be really hard to pin down, and not a transmission problem at all.

VANOS seals, MAF sensor, rear diff. and O2 sensors seem to be common suspects:

http://www.bimmerfest.com/forums/sho...d.php?t=483954

Yeah, I'm not thinking that the transmission is bad. It could possibly be related to a differential; that had already crossed my mind.

Moon the Loon 01-11-2013 05:00 PM

halltristan - I'm having the same issue with my shifting. I have a 2006 X3 M with 74k miles. Did you find a fix(s) for this at all? I Would love to know thanks.


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