Important suspension issue: Wobbling at 80+mph
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Important suspension issue: Wobbling at 80+mph in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Dear all, I am concerned about my car because of what I am experiencing (I will try to explain my ...
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    Muhammad's Avatar
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    Important suspension issue: Wobbling at 80+mph

    Dear all,

    I am concerned about my car because of what I am experiencing (I will try to explain my best):
    1- Car wobbles at 80+ mph (no wobbling before) on straight motorways (highways). Have done wheel balancing, allignment (manual), changed the front 2 x tires.
    2- When exiting on motorways (highways) on the big curve it wobbles if the speed is 50+ mph
    3- I noticed that in wet weather driving at 70+mph I feel the car slips (or sways).
    4- I jacked the front (both front tyres were in air), footbrake was applied and Gear in P. When I tried to swing (left-right) the front tyres, they had a tolerable play.
    5- When I hit a pits and bumps, I feel something is loose under and feel in the steering wheel (I suspected it was under-engine cover and tied it with lots of wire ties but it didn't help)
    6- The 2x tires I changed (mentioned in point 1) were worn from inside (could be allignment).

    I came across a forum on here that someone experiencing similar issues, had changed several things in the suspension but still had issues... and someone suggested Tie Rods on the front wheels (I can't seem to find the same forum) but can someone suggest me based on what I am experiencing.

    If it is tie rods, can someone suggest me what else I can change with this which better to get done together.

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    briggy's Avatar
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    Re: Important suspension issue: Wobbling at 80+mph

    some stuff that you say doesn't make sense. A good alignment specialist would have caught play in the suspension, play makes it next to impossible to align properly. fyi the guys at sears and wallmart are not mechanics, go find a guy who still does it manually at an actual garage that has grease. I'm guessing you have some ware on the car so look into your struts, and bushings to start this should tighten things up quite a bit. The tie rods are cheap and pretty easy to identify when overly worn. Also when you say wabble do you mean vibration, or play in the steering ie you let it go and so it rocking back and forth

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    Kingoftypos is online now Cadillac Owners Master
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    Re: Important suspension issue: Wobbling at 80+mph

    What are the specs on the tires?

    KOT

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    Muhammad's Avatar
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    Re: Important suspension issue: Wobbling at 80+mph

    Briggy, The garage I went to, to get my front 2 x tires changed did alignment manually but they didn't check it.
    From Wobble I mean, above 80mph the front right side (which is passenger side in the UK) wobbling like unbalanced tire, but it's not. I have been to 3 balancing stations, have changed the front two tires, manual tire alignment but still no luck.

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    jran0823's Avatar
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    From what you are describing it could be an inner or outer tie rod. Tie rods are a ball and socket joint and when the wear than create vibration in the front end by allow the wheels to "scrub" instead of the wheels being firmly planted.

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    I have the same exact issue but I noticed mine at 65 and if I hit a bump or dip the wheel will jerk if you dont have a grip on it or just going slow over a speed bump and the right side seems to have a bounce in it also

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    Re: Important suspension issue: Wobbling at 80+mph

    Have the wheel bearings been checked for play?
    Are they after-market wheels if so...Do they have spigot rings installed to stop said vibration?

    If they are aftermarket wheels then its likely that your wheel is on off center causing the vibration, spigot rings help to keep the wheel central when installing, if the bore of the rim is greater than the bore of the hub.

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    Re: Important suspension issue: Wobbling at 80+mph

    Dear
    KOT:
    The tires are 225/50 R17.
    CTSUK:
    The Wheel bearings don't have play. The front wheel were original Goodyear and due to this, I replace the tires (only) with some value tires but problem persist.
    Jran0823:
    The mechanic have checked the tie rods, and he says it is okay...

    Now the mechanic said that the noise over pits/bumps could be due to anti-roll linkbar... could it be so.

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    Re: Important suspension issue: Wobbling at 80+mph

    Guys, what is the Anti-roll linkbar... is it the same as Sway-bar or different. Has any got a picture to upload how Antiroll linkbar and Swaybar look like?

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    If you are getting uneven wear on your front tires then you have an alignment issue. Also when the front is jacked up in the air you should not have any " left to right" play when you try to move wheels. If you have play.... you need tie rod ends. Rattling noise from front end going over bombs sounds like sway bar bushings. My advice.... new sway bar bushings ( front) new tie rod ends and a wheel alignment should do the trick.

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    Re: Important suspension issue: Wobbling at 80+mph

    Dear Djkdawg, pearl03.... Thank you for all the information.... I think I may change what you suggested in one go..

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    Re: Important suspension issue: Wobbling at 80+mph

    Quote Originally Posted by Muhammad View Post
    Guys, what is the Anti-roll linkbar... is it the same as Sway-bar or different. Has any got a picture to upload how Antiroll linkbar and Swaybar look like?
    I'm assuming "anti-roll linkbar" is referring to the sway bar end link, which is the part that attaches the end of the sway bar to the front knuckle. If those are worn out they could definitely cause noise when you hit bumps, but I don't think they would cause this "wobbling" that you're referring to.

    Quote Originally Posted by Muhammad View Post
    Briggy, The garage I went to, to get my front 2 x tires changed did alignment manually but they didn't check it.
    I'm not sure I understand what you mean when you say they "did alignment manually but they didn't check it."

    Quote Originally Posted by Muhammad View Post
    From Wobble I mean, above 80mph the front right side (which is passenger side in the UK) wobbling like unbalanced tire, but it's not.
    The descriptions are a bit hard to follow, but it sounds to me like a blown damper - any time you hit a bump, the damper is too weak to control the spring, so the suspension at that corner cycles over and over again.
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