97 STS Brake vibration
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Suspension, Brakes and Tires Discussion, 97 STS Brake vibration in Item Specific Cadillac Discussion; I just bought a 97 STS with 86K. Great car. When I apply the brakes above about 50 MPH I ...
  1. #1
    air1ren is offline Cadillac Owners Member
    Join Date
    Jun 2005
    Posts
    13

    97 STS Brake vibration

    I just bought a 97 STS with 86K. Great car. When I apply the brakes above about 50 MPH I get a vibration/rumble which feels/sounds like it is coming from under the rear of the car. (It is very much like when you drift to the shoulder of the expressway and hit those grooves in the cement).After the car slows to around 40MPH it goes away. I replaced the pads (they were about 70% worn) with no help. I am going to try the rotors next, they do look fairly worn, but it is hard to tell if there are hard spots. I am wondering if the anti-skid system would cause this symptom. There are no fail messages or lights on. Anyone seen this symptom before? Thanks!

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  3. #2
    EcSTSatic's Avatar
    EcSTSatic is offline Cadillac Owners Connoisseur
    Automobile(s): 1999 STS - diamond white
    Join Date
    Dec 2004
    Location
    Wichita, KS
    Posts
    4,603

    Re: 97 STS Brake vibration

    Is your brake pedal pulsating sharply at the same rate? It could be the ABS kicking in. For the rotor to be warped, I'd expect a "dull" vibration. It could also be a bearing.

  4. #3
    6thCAD is offline Cadillac Owners Member
    Automobile(s): 2000 Cadillac Seville STS
    Join Date
    May 2005
    Posts
    28

    Re: 97 STS Brake vibration

    Most likely rotors. I had the same issue with my '00 STS and I put new pads and rotors on and problem cured. When I would come off of the freeway and apply the brakes it just about would shake a tooth loose. Now you lay into the brakes and not one shake.

  5. #4
    air1ren is offline Cadillac Owners Member
    Join Date
    Jun 2005
    Posts
    13

    Re: 97 STS Brake vibration

    I have not felt it in the pedal, which I agree would be there if a rotor is warped. I think that based on 6th cad's experience I will give the rotors a try, as they could have hard spots causing the brakes to slip and grab rapidly. Thanks to both of you...

  6. #5
    tryn2befree is offline Cadillac Owners Member
    Join Date
    Oct 2003
    Location
    Madison Heights, MI
    Posts
    21

    Re: 97 STS Brake vibration

    I put Pro Slots on the front and Brembo Drilled on the back, coupled with Firehawk pads FR/RR and they work sweet...however, because I drive the piss out of it, 35k mi. later I have warped FR/RR rotors...

    Also, looking to get an SUV so I'm selling and will replace the brakes prior to the sell, anyone have a suggestion as to what OEM pads w/sensor will cost and brand I should go with?

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