Shake Shimmy STS - Page 15
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 15 of 17 FirstFirst ... 5 6 7 8 9 10 11 12 13 14 15 16 17 LastLast
Results 211 to 225 of 253
Like Tree1Likes
Suspension, Brakes and Tires Discussion, Shake Shimmy STS in Item Specific Cadillac Discussion; I have been reluctant to change my control arms. I have read several posts of people who have had them ...
  1. #211
    Dadillac's Avatar
    Dadillac is offline Cadillac Owners Connoisseur
    Automobile(s): 2015 Mazda3 S GT Hatchback 2013 Kia Optima SXL
    Join Date
    Nov 2004
    Location
    Woodbridge NJ
    Age
    48
    Posts
    2,784

    Re: Shake Shimmy STS

    I have been reluctant to change my control arms. I have read several posts of people who have had them changed, and the issue hadn't changed at all. I also have read a few about folks buying the car brand new, and on the trip home from the dealer, experiencing the shimmy. So wear and tear wasn't a factor with their cars. Control arms are expensive. At about $400, I am no longer willing to take the chance, unless I know it is a true fix. Besides, the only wear items on the control arms are the bushings (which do not seem to be available) and the ball joint. The actual aluminum part wouldn't cause the shimmy problem.

    Don

  2. #212
    Raze's Avatar
    Raze is offline Cadillac Owners Enthusiast
    Automobile(s): 90 Eldo -SOLD-, 98 ETC -SOLD-, 86 XR4Ti Track Car, 07 Ranger
    Join Date
    May 2004
    Location
    Atlanta, GA
    Age
    32
    Posts
    963

    Re: Shake Shimmy STS

    Hey have you tried wheel hubs, bearings, drive axle shaft, etc? I'm trying to think up anything in the rotating assembly that might account for it...

  3. #213
    Dadillac's Avatar
    Dadillac is offline Cadillac Owners Connoisseur
    Automobile(s): 2015 Mazda3 S GT Hatchback 2013 Kia Optima SXL
    Join Date
    Nov 2004
    Location
    Woodbridge NJ
    Age
    48
    Posts
    2,784

    Re: Shake Shimmy STS

    Quote Originally Posted by Raze View Post
    Hey have you tried wheel hubs, bearings, drive axle shaft, etc? I'm trying to think up anything in the rotating assembly that might account for it...
    All four hubs have been replaced. Axle shafts have not. That is another part that has not seemed to solve anyones shimmy. I have gone over this hundreds of times. The only logical solution is that of Logan's. It must have something to do with the engine cradle and how it mounts to the body. Or possibly the spring rates of the springs. The only really confusing part ir that it only affects some cars, and not all of them. In one of the earlier posts (I think in this thread) somebody stated something about the trans being the problem. Again, not a cheap solution attempt. Thanks for the input though.

    Don

  4. #214
    mike0580a is offline Cadillac Owners Member
    Automobile(s): 99 SLS
    Join Date
    Dec 2006
    Location
    San Diego, CA
    Age
    42
    Posts
    29

    Re: Shake Shimmy STS

    I'm fighting through a few suspension problems myself. My 99 SLS has a minor (yet annoying) vibration from about 68-75 - most noticable when turning right (curve in the highway).

    As others have stated, vibration normally comes from rotating parts and their supporting structures. Wheel balance, rotors, hubs, 1/2 shafts, control arm bushings and in this car's case the support (crossmember?) bushings.

    Has anyone replaced the control arm or crossmember busings yet? Part numbers are listed at http://gallery.iametarq.com/cars/cad...ePartsList.pdf

  5. #215
    FTT843 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Feb 2007
    Posts
    26

    Re: Shake Shimmy STS

    Years of posts and information yet still no fix, this is crazy............

  6. #216
    obnoxus is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Nov 2006
    Posts
    13

    Re: Shake Shimmy STS

    I bought 2 2001 SLS's at the same time so imagine my suprise when they BOTH did the same thing.

    Outer tie rod ends and hub bearings helped a bunch,,,, now itw the 68-74 mph deal.

    I bought inner tie rods today, crawled under and pulled the boots and had a buddy turn the wheel side to side and there was no play there.

    What I did see was on the passenger side where the rod goes into the rack there is a collar that slides in and out a bit,,,,, is this normal?

    I can feel a clunk if I turn the wheel side to side as hard as I can,,, meaning grab the tire and push in and out.

  7. #217
    El Dobro's Avatar
    El Dobro is offline Cadillac Owners Connoisseur
    Join Date
    Sep 2003
    Posts
    1,471

    Re: Shake Shimmy STS

    I started a thread in the 2006+ DTS discussion area asking if they have the infamous shimmy and I didn't receive any replies, so maybe changing the engine mounts and lower control arms fixed the problem.

  8. #218
    smagnotta is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Feb 2007
    Posts
    16

    Re: Shake Shimmy STS

    About a year ago, I replaced the front control arms & bushings as suggested by GM in their TSB from 2004.

    Two weeks ago, I replaced the 2 struts in the front, the 2 rear shocks, all 4 coil springs, 2 front strut mounts and dust covers.

    Days ago, I changed my BF Goodrich Traction T/A tires to GoodYear ComfortTread tires and of course it helped some since the tires are brand new. I even changed the type of tire -- I went from 235/60/16 to 225/60/16.

    I've tried different tires, even different rims but still the shakes. Many on the list have done these same things with no success.

    The underlying problem (shimmy/shake) is still there. It's not as obvious as before (it was so bad the front passenger seat would shake violently and all the shaking made me sick after a drive), but it's not all gone.

    I guess until I figure this out I'll be buying new tires every 25K miles since this problem has caused my previous tires to wear prematurely. I get my tires rebalanced and rotated every 3,000 miles - that also has not really helped.

    Logan suggests changing the cradle mounts and the engine mounts. It seems that we are just dumping money until someone comes up with a solution.

    Perhaps we should come up with a master list and just check off things that have not worked. From my memory here is a start:

    1- Different brand tires (Goodyear, Michelin, BF Goodrich) and different type of tires from the same manufacturer.
    2- Different size tires (235/60/116, 225/60/16)
    3- Front control arms and bushings (as per GM TSB 2004)
    4- All 4 rotors
    5- Both front struts and strut mounts
    6- Both rear shocks
    7- All 4 coil springs
    8- All 4 brakes
    9- All 4 wheel hubs
    10- All 4 wheel bearings
    11- Roadforce Balance the tires (e.g. Hunter)
    12- Balance and rotating tires every 3,000 miles
    13- Different rims, front to back; back to front; different size rims, different rim manufacturers
    14- The motor mounts
    15- Axle shafts
    16- Inner CV joints
    17- Outer CV joints


    If anyone can add to the list I would appreciate it; maybe this should be a sticky or something.

  9. #219
    Dadillac's Avatar
    Dadillac is offline Cadillac Owners Connoisseur
    Automobile(s): 2015 Mazda3 S GT Hatchback 2013 Kia Optima SXL
    Join Date
    Nov 2004
    Location
    Woodbridge NJ
    Age
    48
    Posts
    2,784

    Re: Shake Shimmy STS

    I have been saying from the beginning that tires cannot be to blame for the shimmy. Today, I do believe that I was wrong. Two days ago I changed my oil, and did a tire rotation. I did not do anything else. Did not get the tires balanced, did not even touch anything suspension related. All I did as remove tires, and put them back on. This morning I was driving to work, and noticed that my shimmy has gotten better. Almost to the point of not being able to feel it. On my way home from work, I purposely drove in the 65-75 mph range. Very little shimmying. I fell in love with the car all over again. Very strange how tires can be affecting our cars like this. I may just get a Hunter RFB for the tires. Just to see if I can get rid of that last little bit of shimmy.

    Don

  10. #220
    DAFFYDRUNK's Avatar
    DAFFYDRUNK is offline Cadillac Owners Member
    Automobile(s): 1999 Seville STS
    Join Date
    Feb 2006
    Location
    Cedar Falls, IA
    Age
    44
    Posts
    24

    Unhappy Re: Shake Shimmy STS

    Not really anything new to add yet, but I bought my 99 STS recently. Aside from all the other problems needing attention when I got it, this car shimmys as well. Wish I woulda read all this stuff before I wrote the check. Worst case of buyer's remorse I've ever had. I've actually made myself physically ill from being pissed about this car, but I'd take a serious bath on it if I dumped it now. I try to look on the bright side and tell myself the GF is gonna be driving this thing most of the time so I won't have to deal with it.

    So far I've bought new tires and rims from Tirerack, and replced the torn front motor mount. Tire rack road force balances the tires when you get em with wheels, so I figured I'd add a little to the cost an go 17" while I'm getting new tires. Anyway, the shimmy is much better but still very much there. Checked for play in the steering and hubs. Seems pretty tight actually. Sometimes it almost goes away, then the road surface chages a little and it comes back. Aerodynamics really does seem to play a factor as the car shimmys less when you go with the wind.

    While a killer RFB might go a long way toward reducing the symptom, I'm also convinced the cradle is the problem. The frequency of the shimmy (8-9 Hz?) seems to remain constant regarless of speed. Sometimes when you hit a bump at lower speeds you can get a similar vibe for a split second. Same frequency. I think it's the cradle jostling around like jello with the soft bushings, and at higher speeds it basically begins to resonate its harmonic.

  11. #221
    JimD is offline Cadillac Owners Connoisseur
    Automobile(s): '98 STS (RIP @ 206,xxx miles)
    Join Date
    Sep 2003
    Location
    Atlanta area
    Posts
    4,832

    Re: Shake Shimmy STS

    Someone seeing this thread for the first time complete with 15,000 views and 220 replies would conclude that each and every '98 to '04 Seville and '00 to 05(?) Deville has this condition. Not true. Why some but not all? Beats me.

    My '98 had the condition, but no more. It's a very long boring story but the fix had nothing to do with motor mounts, cradle mounts, tie rod ends, ball joints, axles, bearings or tire/wheel balance.

    Within a few months of buying my '04 Deville (same suspension as the '98 to '04 Seville), it displays a trace of steering wheel shake at the magic 65 to 70 MPH. I tested the condition on various road surfaces and in 3rd gear as well as 4th. It would ripple the surface of an open coffee container sitting in the cup holder and you could really "see" the affect when holding a pencil perpendicular to the steering wheel between my fingers.

    Took the dealer Service Manager and his vibration monitor for a demo ride. The word came back down the GM food chain; "within acceptable limits".

    Applying some of the lessons I learned from my '98, I pulled the front wheels and rotors. Using whatever wire brush tools it required, I removed any and all traces of rust / corrosion from the the hub, both mounting surfaces of the rotors, and the inboard mounting surface of the wheels. I'm talking about shiny squeaky clean mating surfaces. Bolted it all back together using the proper bolt tightening sequence and a two pass torque procedure on the wheel nuts; first pass to 75 lb ft and second pass to 100 lb ft.

    Cured.

  12. #222
    DAFFYDRUNK's Avatar
    DAFFYDRUNK is offline Cadillac Owners Member
    Automobile(s): 1999 Seville STS
    Join Date
    Feb 2006
    Location
    Cedar Falls, IA
    Age
    44
    Posts
    24

    Re: Shake Shimmy STS

    Quote Originally Posted by JimD View Post
    Using whatever wire brush tools it required, I removed any and all traces of rust / corrosion from the the hub, both mounting surfaces of the rotors, and the inboard mounting surface of the wheels. I'm talking about shiny squeaky clean mating surfaces. Bolted it all back together using the proper bolt tightening sequence and a two pass torque procedure on the wheel nuts; first pass to 75 lb ft and second pass to 100 lb ft.

    Cured.
    Now that you mention it I did clean the rotors with a wire brush. (not perfect but reasonably clean) The rims were brand new. Then I bought a torque wrench just to tighten the wheels. Did basically what you said about the 2 pass. Thought I had the shake down to a survivable level until today when I got the car back from a new rack and motor mount install. I assume they simply threw the wheels on with an impact wrench? The car definately was worse again while driving it home.

  13. #223
    JimD is offline Cadillac Owners Connoisseur
    Automobile(s): '98 STS (RIP @ 206,xxx miles)
    Join Date
    Sep 2003
    Location
    Atlanta area
    Posts
    4,832

    Re: Shake Shimmy STS

    That would be my fear. I would take the wheels off by setting your torque wrench to 100 lb ft to see how many lug nuts you cannot break loose.

  14. #224
    obnoxus is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Nov 2006
    Posts
    13

    Re: Shake Shimmy STS

    I have a hard time thinking cradle mouts contribute to this as being a front wheel drive car the cradle is pulling the rest of the car, not mearly along for the ride.

    I had mine in today for my 5,000 mile rotate and balance drove the car home and the shake was gone,,,go figure.

    Same tires that have been on the car and rotated and balanced twice before, now suddenly they got it right?

    I give up

  15. #225
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
    Join Date
    Feb 2006
    Location
    MD Eastern Shore - Kent Island
    Age
    75
    Posts
    45,928

    Re: Shake Shimmy STS

    JimD........My '02 STS, 39500 mi., has the original 17" Eagle RS-A's with lots of tread left. After I bought the car in 11/04 I did exactly as you did with hub/wheel wire brush cleaning and torque wrench in 3 steps with the wheels off the floor. During 2 Florida and 3 New England runs I have no trace of shake or shimmy. Idea from the past......For a persistent front end vibration, there's a wheel service which spins the tire and wheel on the actual wheel center and measures the out-of-round of the assembly, then, using rotating knives, "shaves" the tire round. It worked on track Jaguars and Healeys.........

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting