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  #1  
Old 01-01-2017, 02:48 PM
drthrowback drthrowback is offline
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2006 X3 "slipping" under WOT above 70 mph

Dear Forum members,

I've been test driving a 2006 X3 (92.5k miles) for the last few days. The vehicle is gorgeous, highland green metallic with orange interior. The only notable problem I can discern is that under heavy acceleration (engine above ~4500 rpm) and above 65 mph, the car loses and regains acceleration with a rapid and consistent poriodicity. I don't want to precondition anyones thoughts, but without being an expert on transmissions, my brain wants to say that the transmission is "slipping".

The only clue I have is that the right front tire is low pressure. The dealer and I have been so preoccupied with the problem that we haven't pumped it up. I'm wondering if this could impact the Xdrive software in some undesireable way.

When the dealer drove it, he thought it could be an engine or transmission mount problem and so had some mount(s) replaced. This did not affect the problem.

Has anyone experienced a problem like this?

Also, I can see a drip or two of oil collected on the underneath of the engine. Oil leaks are probably common on vehicles of this age? I don't have any issue keeping an eye on the oil level if it's just a fact of life.

Thank you all for your kind responses.
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  #2  
Old 01-01-2017, 02:57 PM
BMWaufKS BMWaufKS is offline
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Quote:
Originally Posted by drthrowback View Post
I'm wondering if this could impact the Xdrive software in some undesireable way.
Yes, everything affects it!

Even wrong tire sizes, or just unevenly worn tires.

Read here about the transmissions, transfer case, and electronics.

If I bought it, I'd replace the transmission fluid and filter right away, and the transfer case fluid. The transmission pan, if not cleaned in the last ~10000 miles, would be very telling, as would the lokk/smell/feel of its old fluid.
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  #3  
Old 01-02-2017, 05:30 AM
drthrowback drthrowback is offline
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I hope I didn't pass on a great deal because of low tire pressure. SMH. I'll call the salesman and see what we can do.
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  #4  
Old 01-02-2017, 11:18 AM
drthrowback drthrowback is offline
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Anybody else have thoughts on this? I'm going to try to get the dealer to change the trans/transfer case fluids/filters. I'm feeling a little less concerned about it. Wondering if I should just go ahead and buy.
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  #5  
Old 01-02-2017, 11:23 AM
BMWaufKS BMWaufKS is offline
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Always be concerned with used vehicles! :-{

Yes, the trans, etc. could be damaged, and the cost to repair close to the purchase price of the X3.

Unless is an experienced BMW shop, I wouldn't want anyone else working on these (except myself, of course.). These BMWs are (much) more complex than the typical Toyota, etc.

Take it to a transmission shop of your choice before you buy it -- their test drive should be very informative.
__________________
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Since 1/2016, restoring a
2008 BMW X3 M-Sport, N52, automatic ("#1")
Modifications:
All stock except dashcam

Since 3/2017, also restoring a
2008 BMW X3 base-model, N52, automatic ("#2")
Modifications:
Dashcam, cargo cover, cargo mat
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  #6  
Old 01-02-2017, 12:21 PM
swampX3 swampX3 is offline
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should have transmission and other codes ?

>any transmission maybe slipping greatly as described will throw speed difference etc codes .....very easy for any tech or diy'er with a decent setup to get the codes

>one of the first things you should do buying a used vehicle even from bmw is to get the codes

>many a wallet has been shipwrecked cause of overlooking this simple step and being lead by the siren calls of how pretty the paint and interior are

>the ZF transmissions in these X's are also in many other bmw models plus foreign and domestic vehicles .....(same as the older 5 speed GM transmission in X's and saturn,vw,audi etc etc) many folks with good skills can work on them

>put the last seven of your VIN into realoem.com to get your exact setup for all parts and major assembles like the transmission/transfer case

a guide to scanners etc attached....best wishes on the car hunt....start from post 7 and fan out

some version can also tell sometimes if codes have been erased ....this is what car wholesale folks do all day long to check around what's been active faults on the car

https://www.bimmerfest.com/forums/sho...=1#post9972460

Last edited by swampX3; 01-02-2017 at 12:31 PM. Reason: add info
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  #7  
Old 01-02-2017, 12:26 PM
swampX3 swampX3 is offline
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some good ZF overviews

these are 5 speeds ....millions of ZF s in rangey's/audi/cadillac/gm/vw/bmw etc etc etc

yours is probably 6 ....but almost exactly the same....enjoy




nice two part with great focus on the valve body


Last edited by swampX3; 01-02-2017 at 12:28 PM. Reason: add link
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  #8  
Old 01-02-2017, 03:18 PM
BMWaufKS BMWaufKS is offline
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And a fun fact is that these trans are made by ... GM!
__________________
-------------------------------------------------
Since 1/2016, restoring a
2008 BMW X3 M-Sport, N52, automatic ("#1")
Modifications:
All stock except dashcam

Since 3/2017, also restoring a
2008 BMW X3 base-model, N52, automatic ("#2")
Modifications:
Dashcam, cargo cover, cargo mat
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  #9  
Old 01-04-2017, 04:31 AM
jlex jlex is offline
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Sounds like the problem my '05 was having during heavy acceleration going up hills.
I'll bet the adaptations on the transmission have to be cleared using software.
Read this thread for information: https://www.bimmerfest.com/forums/sho...d.php?t=866684
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  #10  
Old 01-04-2017, 05:22 AM
drthrowback drthrowback is offline
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Interesting reading jlex... Seems like the issue could be a lot of things, but nothing serious? Maybe even something that could be lived with if necessary. I'm very much a car DIYer so I'm not afraid of trying a lot of the fixes that were mentioned. Probably all preventive maintenance items that are coming up anyway

I'd like to try resetting the adaptations. I'm pretty sure the salesman is tired of dealing with me though. He has stopped returning my texts... They "fixed" the problem the other day, delivered the car 40 minutes to my house and I wouldn't buy it because it was still slipping/chugging. I'd be mad at me too.

Maybe I'll give it one more shot with them this evening.
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  #11  
Old 01-04-2017, 06:34 AM
jlex jlex is offline
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Is this a BMW shop you're dealing with? If so, they should have the software to clear the adaptations to fix the problem (if it's what I think it is). I bought the software and fixed it myself, but loading the software was a PITA. Took literally hours to load the software and about 20 minutes to fix it once installed. If they're not a BMW shop, find out the cost and see if your dealer will pay for a BMW shop visit to clear the adaptations.
My car ran great before the fix except for when I floored it while going up PA hills. After the fix, it has absolutely zero hesitation/jerking under heavy acceleration.
As far as the oil leaking goes, it's probably from the oil filter housing. Look at the left side of the engine block to confirm this. It's not a difficult fix. The other oil leak you'll need to deal with is the valve cover gasket. It can leak onto the manifold and cause stink; it can also allow leaking of oil into the spark plug wells & foul things up where the coil packs join to the plugs. Have fun!
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  #12  
Old 01-04-2017, 07:22 AM
drthrowback drthrowback is offline
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No, it's not a BMW shop.

I'm almost convinced now that the problem is anything except the transmission slipping. I could see it being software or maybe the torque converter clutch. Almost excited to just go buy it and figure it out. I love working on cars. Just not spending money
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  #13  
Old 01-04-2017, 07:44 AM
jlex jlex is offline
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Quote:
Originally Posted by drthrowback View Post
No, it's not a BMW shop.

I'm almost convinced now that the problem is anything except the transmission slipping. I could see it being software or maybe the torque converter clutch. Almost excited to just go buy it and figure it out. I love working on cars. Just not spending money
Well, if you like working on cars, you'll love a BMW I'm sure you'll find plenty to keep you busy. I've done a lot on my '05 and now have 121,000 miles on it. Runs like a new car. Lots of good info. on this forum. Just stay away from the stealership or you'll go broke!
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  #14  
Old 01-04-2017, 10:06 AM
BMWaufKS BMWaufKS is offline
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Quote:
Originally Posted by jlex View Post
Just stay away from the stealership or you'll go broke!
Ditto that, with a few exceptions on parts (e.g., OEM fluids, if desired). Plenty of excellent mail-order vendors for most everything, e.g., BAVauto, FCPeuro, RockAuto, etc.

The X3 is definitely keeping this former-mechanic adequately challenged!
__________________
-------------------------------------------------
Since 1/2016, restoring a
2008 BMW X3 M-Sport, N52, automatic ("#1")
Modifications:
All stock except dashcam

Since 3/2017, also restoring a
2008 BMW X3 base-model, N52, automatic ("#2")
Modifications:
Dashcam, cargo cover, cargo mat
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  #15  
Old 01-23-2017, 03:28 PM
drthrowback drthrowback is offline
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Wanted to follow up with you guys.

Taking a calculated risk we went ahead and bought the car. Great news! Between the transmission fluid change, transmission memory reset, and proper tire inflation, the problem has been resolved.

Thanks for the info, links, and tips. First time BMW owner and loving it. Even had fun resealing all the vapor barriers to fix the water leaks we didn't know it had. Hahaha. But hey, that's fixed now too!
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  #16  
Old 01-23-2017, 03:31 PM
swampX3 swampX3 is offline
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many more happy miles !

excellent result ...best wishes....thanks for the feedback
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  #17  
Old 01-23-2017, 04:08 PM
BMWaufKS BMWaufKS is offline
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Good!

How was the "transmission memory reset" performed?
__________________
-------------------------------------------------
Since 1/2016, restoring a
2008 BMW X3 M-Sport, N52, automatic ("#1")
Modifications:
All stock except dashcam

Since 3/2017, also restoring a
2008 BMW X3 base-model, N52, automatic ("#2")
Modifications:
Dashcam, cargo cover, cargo mat
Reply With Quote
  #18  
Old 01-23-2017, 05:18 PM
drthrowback drthrowback is offline
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Well, I honestly have no idea what the validity of this procedure is, but after reading about it enough places I figured it wouldn't hurt to try. Also, I may be using the wrong keyword to describe it.

From memory, it's something like:

1 Turn key to "on".
2 Press and hold accelerator pedal to the floor (until it clicks) for 2s (some said 30s).
3 Release pedal, turn key off.
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jerking, loss of acceleration, slipping, transmission


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