Date: Fri, 24 Aug 2001 01:34:28 GMT From: "Ryan Villaroman" <rjzv79nopsamhlink.net> Subject: Re: Can Misalignment Cause Shimmy?
I have the same problem right now with my '90 corolla. I put new tires in the rear end and when i had them rotated to the front, the car started to vibrate and the steering wheel started to 'shimmy' around 65mph. I had Sears re-balance 'em twice and check the alignment but the vibration is still there. Still have to wait and see if it goes away when i rotate the tires back to where they used to be... "Todd Matsubara" <toddmnopsamhlink.net> wrote in message news:xSgh7.6007$XY4.621395nopsamread2.prod.itd.earthlink.net... > > Sometimes BMW's can get the rotors warped when an impact wrench is used to > tighten the lugs. This is because they use bolts instead of nuts. You can > change the rotors over and over too, it'll just keep happening if they keep > doing this. > > One other area you might want to check is that the wheels fit on the hubs > properly. Sometimes if the wheels are changed, they won't index on the hubs, > causing vibration at the speeds you mentioned. > > One other common cause (which you seem to have taken care of) is tires. > Sometimes a brand new set of tires is all that can fix this. > > Virtually all vibration-type problems like this are related to some type of > component that rotates with speed, rather than a static piece like a > bushing. This is not to say that it's not possible, but usually not > probable. Things like bad bushings usually just cause twitchy, inconsistent > steering problems and odd tire wear. > > Todd Matsubara > TM Engineering > http://www.tmengineering.net > > > > > > "Wyatt Burp" <b_veritynopsameja.com> wrote in message > news:d4735374.0108231527.6f01a235nopsaming.google.com... > > It's always been my understanding that steering wheel shimmy > > happened when a wheel (or wheels) was/were out of balance. > > But I read the other day that it can be due to misalignment. > > (I read this in a Reader's Digest article about keeping your > > car in shape, when it casually mentioned that a shimmy means > > the car's out of alignment--I took this with a grain of salt.) > > > > I've had a shimmy from about 45 mph up to about 70 mph--it lessens > > at higher speeds--ever since I bought my used car ('98 BMW). > > I've posted about this prob. to the BMW NG in the past > > and I didn't get much useful feedback, so I thought I'd check > > with some other auto groups. Balancing and rotating the wheels > > doesn't solve the problem, and the tires are nearly new Dunlops. > > The former owner had the same problem with other tires, apparently. > > Anybody have any ideas what the problem could be. My dealer > > says it couldn't be bushings because this model didn't have > > problem bushings like some of the other BMWs. I'd just like > > some more info from some of you guys who might know before I > > go somewhere to get the problem looked into. Thanks a bunch! > > > > -- > > WB > > > >
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