Shake Shimmy STS - Page 13
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 13 of 17 FirstFirst ... 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 LastLast
Results 181 to 195 of 253
Like Tree1Likes
Suspension, Brakes and Tires Discussion, Shake Shimmy STS in Item Specific Cadillac Discussion; Originally Posted by ohioplayer77 went throw the same thing you did! 2001 sts 17 in rims. i found the fix, ...
  1. #181
    MrEr1c's Avatar
    MrEr1c is offline Cadillac Owners Fanatic
    Join Date
    Nov 2004
    Posts
    277

    Re: Shake Shimmy STS

    Quote Originally Posted by ohioplayer77
    went throw the same thing you did! 2001 sts 17 in rims. i found the fix, thought about calling caddy and selling it to them. dealer also told me it was a bad rim regarding the offset design or the rim. anyway here is what i did. luckily i used to work at a local service station and had access to a tire balancer. i removed all the tires on the car. removed all the weights that were on the rim, and spun each one. i took the roundest two tires and saved them for the front of the car, the least round for the back. i then balanced each tire in the static mode (that means you just put the weight on the inside of the rim.) after the tire balanced out perfect in static mode, i then balanced it in normal mode (that means you put weight on inside and outside of rim.) without removing the previous weight i put on in static mode. after i got a perfect balance in normal mode i went back to static, again without removing any weight put on so far. i did this back and forth till i got a perfect balance in normal and static modes. You will do this from 2 to 4 times a tire, and also have weights spreed all over the rim. some directly across from each other, you may be tempted to remove some weights as you go. DO NOT. i tried everything and this really WORKS. sounds crazy and long, but IT WILL WORK! and save you time in the long run
    so pretty much a GOOD balance will fix the problem?

    Since i will be taking my seville on a road trip next week, i think i will have all four tires rotated and balanced and hopefully that will fix or lessen the vibration.

    Any updates from anyone else?

  2. #182
    fathead14 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Aug 2006
    Posts
    1

    Re: Shake Shimmy STS

    So where are we guys ?? I almost made the mistake of trading my 2001 STS for a 2004 DeVille...I took it (2004) for a ride and felt the same thing, not as bad...seems to me GM/Cadillac is in a pickle with certified pre-owned. I have thrown 1K at the problem (specific Michelins with "load" balancing)...helped but did not cure...what drives me nuts is they know there is a problem but try to shrug you off...my car is certified but they can't fix it...not a way to do business..love the looks of my STS but the shaking makes me mental.

  3. #183
    Dadillac's Avatar
    Dadillac is offline Cadillac Owners Connoisseur
    Automobile(s): 2011 Kia Optima SX 2013 Kia Optima SXL
    Join Date
    Nov 2004
    Location
    Woodbridge NJ
    Age
    48
    Posts
    2,779

    Re: Shake Shimmy STS

    Some people have had luck with balancing the tires with the Hunter Road Force machine. Some (myself included) have not. To date, since November 2004, I have had five sets of tires, and four sets of wheels on my car, and it still has the shimmy. So I am unoptomistic that wheels and/or tires is the root cause. I am through throwing money at the problem, and am living with the issue. Other than this one problem, it has been the nicest vehicle that I have ever owned. The positives of the car far outweigh the negatives. I see the shimmy as an annoyance. I hope that you also can come to grips with it.

    Don

  4. #184
    Logandiagnostic's Avatar
    Logandiagnostic is offline Cadillac Owners Connoisseur
    Automobile(s): 2001 DTS, 2005 Mustang GT, 2010 MINI S
    Join Date
    Feb 2003
    Location
    Nashville, TN
    Posts
    1,077

    Exclamation Re: Shake Shimmy STS

    Ha...I remember buying my car...thinking gezzz...it needs a balance job...

    My thoughts about it....3 years latter....

    Everything...struts...tires..steering..brakes... is mounted to the cradle..

    The cradle is really mounted too loose. The fastest way to snug up is to cut 1/2 inch off each 'tulip' upper cradle mount (metal part).

    Alignment of the cradle is important. There are pilot holes in the rear of the cradle to align the cradle to the body using a pilot rod.

    Most GM vehicles....have a torque axis engine mount. If you can imagine a line from the rear crank snub up through maybe the top of the passenger strut...that is torque axis. These cars have no torque axis engine mangement.

    I have researched into 2001 Eldorado upper dogbone engine mounts. Drivers side should work ok....passenger side would be too tight...too tight with AC lines. Too tight...too tight....


    Tires: Hmmmm.....did a quality control report 20 years ago in college about tires....

    Tires are the hardest part to make...

    No 2 are the same...

    Something to think about...

    Also...where is the soap? Years ago....soap was used to lube the tire during tire mounting....when is the last time you saw THAT done????

    I think....soap was taken away...OSHA or something like that...the business would have to keep a MSDS sheet on file for the damn soapy water. A stored file on site on how to handle the soapy water in a accidental spill......no more soapy water here....

    Have all of our sidewalls been damaged due to this???

    I have a new set of tires sitting in my garage....tire sticker cleary states....'lube tire bead prior to mounting.'

    Screw up the bead/sidewall during mounting....you WILL have a bad tire with invisible damage.

    My local Chrysler dealer has a Hunter machine. I am going to mention I need to talk to the tire guy before he mounts the tires...soap and balance down to 10 pounds....I am also going to slip him $50 to do it right.

    Back to engine mounts......side ones....too loose....get a 2x4 and set between the control arm and the bottom stud of the side mounts...then pry and wiggle.....hello.....look kind of loose??? Imagine 70 mph...

    I currently have urethane chunks trapped in between the mount and the metal bracket. I got the urethane from skateboard wheels found at Acadmy Sports.

    Also playing with slotted washers...to change the drive line angle.

    Next car....if she shakes...walk away.


    Logan Diagnostic
    www.airbagcrash.com offers airbag, air bag, black box, EDR, SDM, accident, deployment, crash data retrieval for GM and Saturn vehicles using the Vetronix CDR tool, air bag recalls, recall, deployment data
    Cadillac LED replacement brake light, brake lights, brakelights for Cadillac, Seville, SLS, STS, Catera, Deville, DTS, Escalade, Escalade EXT
    Deutz, Lister Petter, Isuzu, Dover Ford, rebuilt diesel engines, repair, diesel service, engine rebuilding, marine diesel engine parts and remanufacuring

  5. #185
    98beauty is offline Cadillac Owners Member
    Automobile(s): 98 STS no mods
    Join Date
    May 2004
    Posts
    22

    Re: Shake Shimmy STS

    Adding one more voice to this thread ... wife's 98 STS w/89K miles.

    Two original alum. rims leaking due to sever corrosion. Put two new rims and swapped front tires (crappy Conti Premiums) and rear tires (Nokian M&S). For the two weeks prior to the new rims and the tire swap (when I was driving the car daily) the shimy was nearly imperceptible to me. Infact, I figured it was a rotor going again as I replace front about every 8 months.

    My wife says she has been complaining about it for a year or so ... maybe I really don't listen to her. Anyway, after the rim/tire swap I immediately noticed the shimy. Just like everyone else it starts around 30,tends be worst in the 65-70 range and almost disappears past 90.

    Interestingly, the tire tech (who I trust) said one of the Contis was hugely out of balance and was 'hard' to get balanced. Perhaps a cord is going as well? (PS: They are crappy tires for this car. My fault. Trying to 'soften' the ride for the wife. Yeah, I know ...)

    It also seems too much a coincidence that with much firmer sidewalls in the front now the car exhibits vastly more shimy. Maybe the overly soft sidewalls on the Contis were absorbing a lot of the shake?

    One thing that leads me to think perhaps the cradle bushings are suspect is that under hard acceleration the shimy disappears entirely. Gone. If I lift my foot at all it comes back immediately.

    Maybe the cradle mounts only enhance whatever else is going on?

    I'm leaning towards new rotors (again), a set of new, matched tires, and an alignment ... even if it doesn't fix the shimy the beast needs it anyway.

  6. #186
    GoFish is offline Cadillac Owners Member
    Automobile(s): 2008 STS-V; 2000 STS
    Join Date
    Aug 2006
    Location
    Denver
    Posts
    30

    Re: Shake Shimmy STS

    I started reading through this a couple months ago right after I bought a 2000 STS, and finally just read it to the end hoping for solutions, not just people lamenting about their shimmying cars and experiments. I now realize there are no solutions, at least not easy ones. No pinpoint silver bullet fix to the problem that I had hoped for, even if it meant a big job with that cradle or what-not.

    I bought this car for a comfortable highway vehicle, and now see that I'll probably unload it soon for something else. It was not expensive when I bought it ($12K with 65K miles), but what a shame because it's beautiful inside and out, but that 70 (or so) MPH slight vibration is quite irritating, enough that this is not the luxury road master I thought it would be. Not like the nice Impala SS I drove on the highway for about 8 years - that was a nice comfy highway car!

    My local Caddy dealer won't touch this problem. They made that VERY clear, telling me "some of our owners even go across town to the truck tire places and have their tires shaved." Good luck with that. I didn't ask you about tire shaving, I asked about Hunter balancing. They don't want to even try.

    Too many variables, and I don't have the luxury of play time with cars that I once did, nor the desire. I'll take Logan's advice - if the next car I'm looking at has any vibes at all at speed - walk away. Too bad Cadillac missed the mark on this beautiful STS, and thanks to all on this forum who have spent time contributing their efforts to resolving this shimmy problem. However, after reading nearly 200 threads, I believe this problem is affected by a number of variables to different degrees for each vehicle. Tires/rims, hubs, cradle bushings, maybe even brakes, and then it still seems to be a hit-or-miss proposition, and lots of money and time trying.

    Could just be time for that fancy Japanese car I've been avoiding for the past 20 years...how sad!

  7. #187
    98beauty is offline Cadillac Owners Member
    Automobile(s): 98 STS no mods
    Join Date
    May 2004
    Posts
    22

    Re: Shake Shimmy STS

    Update on shimy in our 98 ...
    Recently replaced two severely corroded original wheels with two A+ used wheels. Also replaced the mixed set of tires (crappy Contis and okay Nokians) with a set of Kuhmos. My initial take was it felt good and the Kuhmos were a HUGE improvement in handling and noise.

    Wife reports shimy is virtually gone ... at least it has gone from a major handling issue to an almost unfelt annoynace. While swapping tires also discovered the two original wheels not replaced were badly corroded too. Balancing was tricky as well.

    Am watching for good used wheels and will swap out the other two when possible. If lucky this will eliminate the shimy in the STS ... the shimy in the wife is still fine .

  8. #188
    FrankT's Avatar
    FrankT is offline Cadillac Owners Enthusiast
    Automobile(s): 99 STS
    Join Date
    Mar 2004
    Location
    Michigan
    Age
    58
    Posts
    699

    Re: Shake Shimmy STS

    Hello all,
    My 99 STS had a shimmy for the last few months. I took the car to Discount Tire and asked for a balancing with the Hunter Road Force machine. I stayed in the service bay talking with the tech while he performed the balance. I found out that that machine applies 1500lbs of force to the tire and is able to match both the heavy spot of tire to the heavy spot of wheel. Anyway it flagged the right rear it was at 35lbs out. He then checked the wheel for run-out it tested ok (0.004 in) then he warranted the tire (Michelins Energys) and rebalance the tire and wheel. The car is now smooth as silk for a mere $ 22.50 for a new warrenty, now I love it again.

    What I am upset about now is all the corrossion I found on the wheel where the bead of the tire seals. Means future rim leaks.
    Frank

  9. #189
    tommygun is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Nov 2006
    Posts
    8

    Re: Shake Shimmy STS

    So does this shimmy problem not affect the pre-1998 Sevilles? I don't see anyone hear complaining about a 97 and earlier Seville or Eldo shaking. I'm looking to buy a Cadillac now; I'd like to know what I'm up against. It sounds like a 96 or 97 might be the way to go.

  10. #190
    ellives is offline Cadillac Owners Fanatic
    Automobile(s): '76 Eldo convertible, 97' STS Z-rated, '02 STS
    Join Date
    Sep 2003
    Posts
    169

    Re: Shake Shimmy STS

    Quote Originally Posted by tommygun View Post
    So does this shimmy problem not affect the pre-1998 Sevilles? I don't see anyone hear complaining about a 97 and earlier Seville or Eldo shaking. I'm looking to buy a Cadillac now; I'd like to know what I'm up against. It sounds like a 96 or 97 might be the way to go.
    I owned a '96 until recently and still own a '97 STS with the Z-rated suspension plus an '02 STS. I'll tell you the '97 has it all over the '02 as far as driveability is concerned. The '97 is solid as a rock on the highway. I love driving it. The '02 shimmies like all get out on the highway. Lots of toys in it but for the pure enjoyment of the drive the '97 wins hands down. This is even true with the 127K miles on the '97 and 56k on the '02. Go figure.

    I'm going to spend some concerted effort in December to see if I can't get the shimmy problem solved by using some of the recommendations on this thread. I'm going to focus initially on getting the tires Hunter balanced. The car has relatively new Hancook (at Chinese brand I think) tires on it. The '97 have 2 of them on the rear and I've had no problems yet. I recently had my mechanic take a stab and the vibration problem and he found one of the wheels is warped/bent and moved it from front to rear which improved the problem but did not resolve it. I'll probably look into replacing this wheel too. It's the stock 17" wheel so I should be able to get one on ebay I suppose.

    I'll post here as I get some results, good or bad.

  11. #191
    JOHN Z is offline Cadillac Owners Member
    Automobile(s): Cadillac 2002 SLS
    Join Date
    Nov 2006
    Location
    MICHIGAN
    Posts
    2

    Re: Shake Shimmy 2002 SLS

    I Also Have A Similiar Problem, It Comes In At About 55mph And Goes Away At 65. Also Just Had The Rack Replaced Last Week And No Improvement. I'm Thinking Possible Axles Half Shafts.

    I Just Purchased The Car With 122,000 And Seems To Run Great In Every Other Respect.

    The Car Has Michilins

    Thank You

  12. #192
    100
    100 is offline Cadillac Owners Enthusiast
    Automobile(s): 1995 Sedan De Ville (4.9 L)
    Join Date
    Oct 2003
    Location
    Woodridge, Illinois
    Posts
    580

    Re: Shake Shimmy STS

    I am not sure if this has been discussed here or not (this thread is waaay tooo looong to read), but I just found out that 98+ Sevilles and 00+ DeVilles have different stabilizer bar links.

    I thought it may be worth sharing with you guys. I believe this shake-shimmy occurs only to those cars. I thouhgt this may be just a coincidence, but may be related. Mine (95 DeVille), other DeVilles up to 99, Sevilles up to 97, and all Eldorados have end links with ball joints. Cars suffering this shake and shimmy have end links with elastic bushings...

    Just a thought, has anybody tried to replace link bushings to see what happens (assuming that those cars exhibited no shake-shimmy when new)?

  13. #193
    sean.pd is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Jan 2007
    Posts
    6

    Re: Shake Shimmy STS

    my car also has this problem. It is a 98seville. I have 20s on the car also. My question is did these cars have the same problem brand new? it not, it can be fixed.

    if the car shimmys at 55-75, why would it smooth out if i do 75+? Their is even more force beging put upon the car at the greater speed, however no shimmy. Strange.

    Its very sad a cadillac rides like this.

  14. #194
    El Dobro's Avatar
    El Dobro is offline Cadillac Owners Connoisseur
    Join Date
    Sep 2003
    Posts
    1,471

    Re: Shake Shimmy STS

    The thread that never dies.
    The other day, a friend of mine was picking up another car and he asked me to drive his Buick back for him. It's a '96 Century. When I hit the highway with it, it shimmied like hell. When we got back to my place, I asked how long it had the shimmy and he said awhile. I got the floor jack out and started checking things. When he couldn't tell me the last time the front end was lubed, I got the grease gun out and did the balljoints and tierod ends. When we took the car out, the shimmy was gone. Even though there wasn't any noise, the joints needed grease. That got me to thinking about the Caddy shimmy. Since the balljoints and tierod ends are sealed, how do you know that they have enough grease in them? Maybe the shimmy comes from a lack of the proper amount of lube.

  15. #195
    Dadillac's Avatar
    Dadillac is offline Cadillac Owners Connoisseur
    Automobile(s): 2011 Kia Optima SX 2013 Kia Optima SXL
    Join Date
    Nov 2004
    Location
    Woodbridge NJ
    Age
    48
    Posts
    2,779

    Re: Shake Shimmy STS

    I was considering installing torque struts (dog bones) on my Seville to see if that had any effect on the shimmy. With pictures taken by Jim Hare (thanks Jim) I figured that it can be done, but several issued arise. Fuel lines, dip stick location, power steering hoses, and possibly hood clearance, all need to be modified. Too much for something that may not help. I may try and design my own style torque strut to experiment with though.

    Don

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