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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Wed, Jul-21-2010, 07:57:04 PM   #1
Poowill
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Default Help with weird pulsing vibration in steering wheel

At highway speeds I get a very strange vibration in the steering wheel. Any speed about 50 mph or so I can set the cruise and the steering wheel will begin to shake but then go away, then come back, then go away...almost in a "pulsing" interval manner. Its very strange.

Both LCA Bushings are new, tie rods new within last 6 months, brand new oem rotors front and rear, tried a different set of wheels to rule out bends, wheels have been balanced, alignment done within 6 months, and recently replaced guibo.

The last thing I did was the guibo, and that is when I seem to remember first noticing the problem. But since the guibo is driveshaft related and the vibration is in the wheel, i wouldn't suspect them to be related. But maybe?

I'm running out of ideas. I know its tough to say without looking under the car and checking for any loose bushings or bends, but thought someone might have a suggestion on what it could be.

Thanks for any help!
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Old Fri, Jul-23-2010, 12:44:26 AM   #2
Evomies
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I had similar symptoms, it turned out to be the steering rack. A good mechanic should be able to diagnose it.
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Old Fri, Jul-23-2010, 01:59:23 AM   #3
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Originally Posted by Evomies View Post
I had similar symptoms, it turned out to be the steering rack. A good mechanic should be able to diagnose it.
Did you have to get the steering rack replaced? Or was it just a part? I know there's a steering rack guibo that could possibly go bad.

Thanks for the reply
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Old Fri, Jul-23-2010, 04:25:20 AM   #4
WRXEATR
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You need to start diagnosing for loose parts. Grab the wheel at 3,9 listen for play, and at 6,12 same thing. One of you tie rods could have came loose. Jack the front of the car up. Spin the wheel, visually, does the wheel spin smoothly without any taco effect? Bad struts will cause cupping of your tires that form them into more of an oval type shape than circular - happened to my winter sports last winter.

Steering rack play can be tightened/corrected via the nut on top of the rack.

Could be:

Tires, wheel bearing, tie rod, sway link, control arm, sway bar bushing, and many other things.

Swap wheels front to back. Symptoms still the same???

The steering guibo being old wont cause a vibration, it will make your steering turn in/out feel spongy, numb, and less crisp.
GL

Last edited by WRXEATR; Fri, Jul-23-2010 at 04:29:13 AM.
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Old Fri, Jul-23-2010, 10:52:47 AM   #5
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Originally Posted by Poowill View Post
Did you have to get the steering rack replaced? Or was it just a part? I know there's a steering rack guibo that could possibly go bad.

Thanks for the reply
I had the steering rack replaced with a rebuilt one from Ebay. Solved the issue.
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Old Wed, Sep-29-2010, 01:07:14 AM   #6
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A little bit of an old thread, but Poowill, did you resolve this issue? I have the exact same thing on my 1999... 78,000 miles. Vibration cycles every 1-2 seconds at highway speeds and it is getting worse over the last 6 months.. I can feel it in the wheel and in the seat and the shifter is starting to shake from it.



Gonna start going through the above list this weekend I guess.
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Old Tue, Oct-05-2010, 08:15:14 PM   #7
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A little bit of an old thread, but Poowill, did you resolve this issue? I have the exact same thing on my 1999... 78,000 miles. Vibration cycles every 1-2 seconds at highway speeds and it is getting worse over the last 6 months.. I can feel it in the wheel and in the seat and the shifter is starting to shake from it.



Gonna start going through the above list this weekend I guess.

The vibration did go away thankfully. Unfortunately, I have no idea what fixed it. I took it back to the shop that put on my new tire, and they said they "road forced" balanced the front wheels, but they couldn't find anything out of alignment. Strangely, the drive home was vibration free. So either they screwed something up the last time they mounted the tire and just didn't want to say anything, or somehow remounting the wheels solved the issue.

Wish I knew! Good luck!
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Old Wed, Nov-03-2010, 06:36:10 AM   #8
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Hmm, I'm having these exact same symptoms. I guess I'll try the tires first then. Anyone else have any updates regarding this pulsing vibration?
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Old Wed, Nov-03-2010, 06:53:22 AM   #9
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How are your LCAB's and other parts that he listed in his original post?
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Old Wed, Nov-03-2010, 06:59:47 AM   #10
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LCABs are stock @125,000 miles. I inspected them this weekend, and they visually appear fine. Struts are stock too, as are front control arms. I have a feeling it's tire related, but can't be sure until I throw on another set of wheels. I guess I'm stuck trying to figure out why the vibration would be pulsing, like the original poster mentioned. I mean, if it were tires, I would think it would be constant, and directly related to wheel speed. And perhaps the same if it were a driveshaft issue. But like OP said, it's a very rhythmic pulse on, pulse off, sensation. Kind of sounds/feels like an off balance washing machine when it's on spin cycle haha.

PS, guibo, CSB, RTABs, and tires are all new, and also around the time I started to noticing this problem was the weekend all these were installed. I've since revisited each item to make sure I properly installed them.
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Discussing Help with weird pulsing vibration in steering wheel in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)