Unusual suspension feel????
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2009-2014 Cadillac CTS-V General Discussion Discussion, Unusual suspension feel???? in Cadillac CTS-V Series Forum - 2009-2014; Since I bought my 2011 A6 V coupe in March I've noticed and have tried to figure out what my ...
  1. #1
    USAFRET is offline Cadillac Owners Fanatic
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    Unusual suspension feel????

    Since I bought my 2011 A6 V coupe in March I've noticed and have tried to figure out what my V is doing and how to fix it. I'm stumped. Here's the deal. First some details on the car.

    It's a 2011 A6 V coupe that had 4206 miles on it when I bought it in March. The selling dealer claimed two tires were damaged during transport and bought and installed new Hankook V12 tires filled with nitrogen to factory specs. The car is flawless except for this anomaly.

    When speeds exceed about 45 MPH all the way to (let's just say above posted limits) the vehicle keeps wandering back and forth. It's worse than any Corvette I have ever owned and Vette's are knowing for "traming I believe is the term" as a by product of suspension alignment and big wide tires. But my V is so bad it has made my wife feel ill. I've played with tire pressures and nothing I can do corrects or reduces the affect.

    The car feels like it's riding on the surface and is being pulled back and forth almost "darting" back a forth. It' annoying.

    The car tracks true and straight and there doesn't appear to be any unusual tire wear.

    I would appreciate any help from long time V owners.

    Cheers

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  3. #2
    Trapspeed's Avatar
    Trapspeed is offline Cadillac Owners Connoisseur
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    Your tires are more than 90% in probability your problem. Mismatched sets are notorious for this problem.

  4. #3
    musclecar6 is offline Cadillac Owners Member
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    Re: Unusual suspension feel????

    Just curious, why did the dealer put Hankooks on it( assuming PS2's are on the front). To save a few bucks ?

  5. #4
    USAFRET is offline Cadillac Owners Fanatic
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    Re: Unusual suspension feel????

    Quote Originally Posted by musclecar6 View Post
    Just curious, why did the dealer put Hankooks on it( assuming PS2's are on the front). To save a few bucks ?
    They claimed the two left side tires had visible sidewall damage from what they believe was a defect with the hauler that transported the vehicle from the auction site several hundred miles from the dealer. I have no reason not to believe them. It is what it is, not much I can do about that now.

    They bought and installed four brand new Hankook tires. But back to my problem, could a poor alignment be the cause? Even though the car tracks straight and true and has no shimmies.

  6. #5
    RaVeNous is offline Cadillac Owners Enthusiast
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    Re: Unusual suspension feel????

    The have NO excuse for not marching the factory tires. Not only the mismatch, but the tire brand and model could account for this. Certain tread patterns are much worse about this than others. Start there.
    Club Malibu likes this.

  7. #6
    USAFRET is offline Cadillac Owners Fanatic
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    Re: Unusual suspension feel????

    Quote Originally Posted by RaVeNous View Post
    The have NO excuse for not marching the factory tires. Not only the mismatch, but the tire brand and model could account for this. Certain tread patterns are much worse about this than others. Start there.
    Before I dump four brand new tires and spend $1400 on new tires I'm going to have my dealer take a look at my car first. There is always a chance something else could be wrong like alignment. I'll gladly pay for alignment if that could cure the problem and even if it doesn't at least I'll know that part of my suspension is in spec and then can move on.

    Cheers

  8. #7
    pat2t2f's Avatar
    pat2t2f is offline Cadillac Owners Fanatic
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    If its the tires, the dealer should pay for new ones. He is the one who put non stock tires on the car in the first place.
    neuronbob likes this.

  9. #8
    thegraham77 is offline Cadillac Owners Member
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    Re: Unusual suspension feel????

    I have the same tires on my '11 A6 and haven't had any problems that you've described here. I really like these tires. I guess it's possible you have a bad set of tires though (if that's indeed what the problem is).

  10. #9
    Cadillac Cust Svc's Avatar
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    Re: Unusual suspension feel????

    Hello USAFRET,

    I would like to research this issue for you further. Have you had your vehicle diagnosed recently at your local GM dealership? If you could provide me with your name, address, phone number, VIN, vehicle mileage, and name of preferred dealership via private message, I can research the issue further for you. Thank you!

    Jessica
    Cadillac Customer Care

    Quote Originally Posted by USAFRET View Post
    Since I bought my 2011 A6 V coupe in March I've noticed and have tried to figure out what my V is doing and how to fix it. I'm stumped. Here's the deal. First some details on the car.

    It's a 2011 A6 V coupe that had 4206 miles on it when I bought it in March. The selling dealer claimed two tires were damaged during transport and bought and installed new Hankook V12 tires filled with nitrogen to factory specs. The car is flawless except for this anomaly.

    When speeds exceed about 45 MPH all the way to (let's just say above posted limits) the vehicle keeps wandering back and forth. It's worse than any Corvette I have ever owned and Vette's are knowing for "traming I believe is the term" as a by product of suspension alignment and big wide tires. But my V is so bad it has made my wife feel ill. I've played with tire pressures and nothing I can do corrects or reduces the affect.

    The car feels like it's riding on the surface and is being pulled back and forth almost "darting" back a forth. It' annoying.

    The car tracks true and straight and there doesn't appear to be any unusual tire wear.

    I would appreciate any help from long time V owners.

    Cheers

  11. #10
    USAFRET is offline Cadillac Owners Fanatic
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    Re: Unusual suspension feel????

    Quote Originally Posted by pat2t2f View Post
    If its the tires, the dealer should pay for new ones. He is the one who put non stock tires on the car in the first place.
    I bought the car out of state, so my local dealer (who has been superb) will be handling this claim/issue. I doubt they will pay for four new tires considering my car only has 6300 miles on it.

  12. #11
    pat2t2f's Avatar
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    You are right. I thought you purchased from a local dealer.

  13. #12
    spearfish25 is offline Cadillac Owners Enthusiast
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    Re: Unusual suspension feel????

    So the original dealer threw away the other two tires with only 4200 miles on them? And then put on some cheapo Hankook V12s? I'd be furious. They should buy 4 new PS2s for you. The two good ones that were tossed had a lot of life in them, and they should have replaced the damaged tires with standard OEM PS2s.
    RapidRob likes this.

  14. #13
    neuronbob's Avatar
    neuronbob is offline Cadillac Owners Connoisseur
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    Re: Unusual suspension feel????

    Post retracted due to reading comprehension.....

  15. #14
    DCV
    DCV is offline Cadillac Owners Fanatic
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    Re: Unusual suspension feel????

    Obvious question, are the tire pressures set properly on all 4 tires? I can feel a difference of 2-3 pounds on my V if they are not each set properly.

  16. #15
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    Re: Unusual suspension feel????

    Quote Originally Posted by USAFRET View Post
    They bought and installed four brand new Hankook tires. But back to my problem, could a poor alignment be the cause? Even though the car tracks straight and true and has no shimmies.
    Quote Originally Posted by USAFRET View Post
    Before I dump four brand new tires and spend $1400 on new tires I'm going to have my dealer take a look at my car first. There is always a chance something else could be wrong like alignment. I'll gladly pay for alignment if that could cure the problem and even if it doesn't at least I'll know that part of my suspension is in spec and then can move on.
    Why would the tires be 'mismatched if the dealer put on four new tires?

    'Assuming' the Hankooks are the correct sizes, not overinflated and there are no worn suspension parts - then possibly some minor tweaks to the alignment may be all that is needed. Tire wear won't show up for awhile, but the camber or toe-in being off will be noticeable... particularly when you start driving on new tires of a different brand. And the alignment may have gotten messed up when the other tires were damaged.

    Info on: Tramlining

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