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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > Staggered setup and AWD system Issues



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      09-08-2012, 07:40 PM   #1
gqong
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Staggered setup and AWD system Issues

I had the stock 17" rims on my car and the car was running fine. I traded the stock rims for 19" AG 8.5 and 9.5 on Hankook 245/35/19 and 275/30/19 tires and now when the car accelerates I get a type of clunk noise and on deceleration another clunk. I am not sure if the AWD is not liking this combo or what but driving the car feels painful now. I am also lowered on KW v1 about 1.5 inch all around. I think there is some rubbing but im not sure if this is contributing to this type of 'clunk'. Has anyone had similar issues like this? Or know of things to try. I am going to try to raise it a little I guess but I am not positive that is the true problem.
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      09-08-2012, 08:14 PM   #2
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Welppp...just pulled fuse 26 which disables awd and that just solved all of my answers. Something is acting up with the AWD either it doesnt like the tires or something else.
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      09-08-2012, 08:59 PM   #3
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if you are correct about the awd system not liking the setup i would guess it may be caused by the chosen tire sizes. i believe 235/35F and 265/30 is our recommended setup.
..as far as pulling te fuse out, i think that may have a damaging effect to our systems by making our the front axels and shaft take a load with out being ingaged? just seems damaging? anywho i hope my 2€ sounds valid and that your car gets back to par.
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      09-08-2012, 09:20 PM   #4
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yeah i only ran it as a test ot figure out what was going on. the driveability was so bad it was clunking back and forth I just need to now find a solution to fix this. if it is indeed the tire ratios or is there an underlying issue. i thought people with XI's/lowered have run this size before. they are hankook tires so im not sure if that is the problem with just the sizes, i know there was a recommended size of 235/35 and 265/30 but could just those small differences have such a devastating effect??!?!??
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      09-09-2012, 11:56 AM   #5
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I had the exact same problem,
I was running stock measure 225/40-18 and 255/35-18 but different brands,
used Michelin's front and new Hankook S1's rear.

The dealer always blamed them for not being RFT's,
showed me that by putting on all around 225-17 BMW RFT winter tyres the problem went away.
Of course they wanted to sell new BMW tyres.

They never said that the only reason was the different running diameters.

I then asked for a piece of electrical wire, about 2,10m long and measured the circumference on my own,
there was about 2,5cm less rear then front. Calculated this makes more than 1% difference.
This makes the system think that there is always wheelspin in the rear and engages the front drivetrain much harder as effectively needed.
Together with the sloppy tranny bushings you get a nice plop.
The xdrive system also reacts to this difference and tries to compensate, but mechanically this is not possible as there is no center diff.
My car was almost undriveable, when xdrive engaged the front pulled more than the rear was pushing and reacted unpredictabely with lots of understeer.

Take a wire an test on your own,
then get the correct tire measure.
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      09-10-2012, 12:35 PM   #6
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Quote:
Originally Posted by serotoninsteve View Post
I had the exact same problem,
I was running stock measure 225/40-18 and 255/35-18 but different brands,
used Michelin's front and new Hankook S1's rear.

The dealer always blamed them for not being RFT's,
showed me that by putting on all around 225-17 BMW RFT winter tyres the problem went away.
Of course they wanted to sell new BMW tyres.

They never said that the only reason was the different running diameters.

I then asked for a piece of electrical wire, about 2,10m long and measured the circumference on my own,
there was about 2,5cm less rear then front. Calculated this makes more than 1% difference.
This makes the system think that there is always wheelspin in the rear and engages the front drivetrain much harder as effectively needed.
Together with the sloppy tranny bushings you get a nice plop.
The xdrive system also reacts to this difference and tries to compensate, but mechanically this is not possible as there is no center diff.
My car was almost undriveable, when xdrive engaged the front pulled more than the rear was pushing and reacted unpredictabely with lots of understeer.

Take a wire an test on your own,
then get the correct tire measure.
i think with my tire size im at the 1% difference as well. were you able to fix your issues with just new tires?
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      09-10-2012, 02:52 PM   #7
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Quote:
Originally Posted by gqong View Post
i think with my tire size im at the 1% difference as well. were you able to fix your issues with just new tires?
Yes,
I have the new Hankooks S1 EVO2 now in 225/40-18 and 255/35-18
and no more problems at all.

Xdrive is very sensitive,
every little difference in rolling circumference puts stress on the tranny and
transfercase and causes premature wear.

Did you measure your tyres?
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      09-11-2012, 06:50 PM   #8
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yeah i just fixed it by changing the tires. thanks for the help. i went with 235/35/19 and 275/30/19....awd is super sensitive.
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      09-18-2012, 02:06 PM   #9
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It should not be that sensitive. There is a couple % tolerance built in. I run 225/265 without issues.
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      11-11-2012, 04:04 PM   #10
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Quote:
Originally Posted by PSUSMU View Post
It should not be that sensitive. There is a couple % tolerance built in. I run 225/265 without issues.
What are your full wheel specs, and on what ride?
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      11-12-2012, 09:28 AM   #11
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Quote:
Originally Posted by fordperf View Post
What are your full wheel specs, and on what ride?
2009 328xi
KW V1
18x9.5" et19 225/40
18x11" et32 265/35
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      11-12-2012, 11:36 AM   #12
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Quote:
Originally Posted by PSUSMU View Post
2009 328xi
KW V1
18x9.5" et19 225/40
18x11" et32 265/35
did you measure the circumference, is there any difference btwn front and rear?
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      11-12-2012, 11:42 AM   #13
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Quote:
Originally Posted by Tim603 View Post
did you measure the circumference, is there any difference btwn front and rear?
Original Tires Diameter (in.) 25.09
New Tires Diameter (in.) 25.3
Difference in diameter (in.) 0.217
Percent Difference % 0.856
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      11-12-2012, 12:41 PM   #14
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Quote:
Originally Posted by PSUSMU View Post
Original Tires Diameter (in.) 25.09
New Tires Diameter (in.) 25.3
Difference in diameter (in.) 0.217
Percent Difference % 0.856
I believe it has to do with the circumference. The Rear tires circumference and the Front tires circumference and the difference between the two. Your original tires are irrelevant
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      11-12-2012, 01:02 PM   #15
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Quote:
Originally Posted by Tim603 View Post
I believe it has to do with the circumference. The Rear tires circumference and the Front tires circumference and the difference between the two. Your original tires are irrelevant
That is front/rear. The "original/new" terms are copied from the e90post tire calculator. Circumference is a function of diameter.
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      11-23-2012, 07:50 PM   #16
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I'm having these issues since changing from Morr (19x8,19.5)235/35,265/30 to e90 m3 (19x8.5,19x9.5) 235/35&265/35

this is going crazy and undriveable. The only difference is the rear tyres are 35 series instead of 30 series.

While driving my trac control keep coming on which is impossible on dry land, turning it off doesn't help ...

Any ideas or solutions ?
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      11-24-2012, 03:37 AM   #17
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Quote:
Originally Posted by DonJuan360 View Post
I'm having these issues since changing from Morr (19x8,19.5)235/35,265/30 to e90 m3 (19x8.5,19x9.5) 235/35&265/35

this is going crazy and undriveable. The only difference is the rear tyres are 35 series instead of 30 series.

While driving my trac control keep coming on which is impossible on dry land, turning it off doesn't help ...

Any ideas or solutions ?
You realize the 265/35 is taller than the 235/35 right? from reading your post, I get the idea that you already know what's wrong, what more do you want to hear?
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      11-24-2012, 04:03 AM   #18
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Quote:
Originally Posted by DZhengHellaFlush View Post
Damn you get stang when you have awd. should of went with the box. or just bought a RWD. Upload some pics i wanna see it. always do box setup when you have AWD
the "box?" 'Dafuq are you talkin' about dude? A square setup?
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      11-24-2012, 05:24 AM   #19
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Quote:
Originally Posted by shim! View Post
You realize the 265/35 is taller than the 235/35 right? from reading your post, I get the idea that you already know what's wrong, what more do you want to hear?

I suspect this is the issue and as I read more I'm discovering the xi system is VERY sensitive
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      11-24-2012, 01:29 PM   #20
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Quote:
Originally Posted by PSUSMU View Post
2009 328xi
KW V1
18x9.5" et19 225/40
18x11" et32 265/35
PLEASE post pics of your car to the aggressive XI wheel thread!!
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      11-24-2012, 06:57 PM   #21
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Quote:
Originally Posted by gqong View Post
I had the stock 17" rims on my car and the car was running fine. I traded the stock rims for 19" AG 8.5 and 9.5 on Hankook 245/35/19 and 275/30/19 tires and now when the car accelerates I get a type of clunk noise and on deceleration another clunk. I am not sure if the AWD is not liking this combo or what but driving the car feels painful now. I am also lowered on KW v1 about 1.5 inch all around. I think there is some rubbing but im not sure if this is contributing to this type of 'clunk'. Has anyone had similar issues like this? Or know of things to try. I am going to try to raise it a little I guess but I am not positive that is the true problem.

jumping to a 285/ 30 in the rear would make both overall diameter 25.8 inches. or dropping down to a 235 35 front would make it 25.5 vs the 275 30 rear at 25.6
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      11-24-2012, 10:23 PM   #22
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I went back to stock now I have no problem. What's the best tires combo for 19 to not have issues ?


Is it better to go with 18 or run 19,8 & 19,9 ?
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