GM Retiree. Cadillac Lover! New to the Cadillac Owners.com. Clunking problem in RR.
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2008-2013 Cadillac CTS General Discussion Discussion, GM Retiree. Cadillac Lover! New to the Cadillac Owners.com. Clunking problem in RR. in Cadillac CTS Second Generation Forum - 2008-2013; I have owned almost every make of GM vehicles, but am converted to Cadillac many times over, when I bought ...
  1. #1
    teejcee44 is offline Cadillac Owners Member
    Automobile(s): 2009 CTS AWD
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    GM Retiree. Cadillac Lover! New to the Cadillac Owners.com. Clunking problem in RR.

    I have owned almost every make of GM vehicles, but am converted to Cadillac many times over, when I bought my first 03 CTS. Today I own an 09 CTS4 that is luxurious and fun to drive. I had a problem with handling on left turns at high speed on highway driving that was "driving" me crazy. I first thought it was a tire problem, since the problem became quite noticeable when I installed a new set of Michelin tires. After two times returning the vehicle to the tire shop that installed the tires. I went online (Alldata Pro) to look at TSB's, and found an article on this very thing. It was a safety recall which included a "clunking" noise in the rear, where a tie rod may work loose, and cause unsafe handling, which described exactly what I was experiencing. Turns out that the safety recall had already been done, but I finally took the vehicle to a Cadillac dealer in Batesville, AR, and they fixed the handling problem, but I still have a clunking in the right rear of the vehicle. Anybody have suggestions?

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: GM Retiree. Cadillac Lover! New to the Cadillac Owners.com. Clunking problem in R


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    tinman's Avatar
    tinman is offline Cadillac Owners Connoisseur
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    Re: GM Retiree. Cadillac Lover! New to the Cadillac Owners.com. Clunking problem in R

    Initially I would crawl under the car and start grabbing what I could. Do a visual then shake it to see if anything is loose. Maybe you will hear something. Maybe a strut?

  5. #4
    MrHolland's Avatar
    MrHolland is online now Super Moderator
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    Re: GM Retiree. Cadillac Lover! New to the Cadillac Owners.com. Clunking problem in R

    Welcome to the forum. Lots of good people and info in here. Enjoy your stay!!!

  6. #5
    Z71's Avatar
    Z71
    Z71 is offline Cadillac Owners Connoisseur
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    Re: GM Retiree. Cadillac Lover! New to the Cadillac Owners.com. Clunking problem in R

    Could be the rear limited slip differential, change the fluid as the oem fluid is low quality as referenced by the bulletin.

    #10-04-20-001B: Rear Axle Clunk and/or ChatterType Noise on Turns (Drain/Refill Rear Differential Fluid) - (Apr 21, 2010)
    Subject: Rear Axle Clunk and/or Chatter Type Noise on Turns (Drain/Refill RearDifferential Fluid)

    Models: 2003-2010 Cadillac CTS,Sport Wagon (Including V-Series and Export)
    2004-2009 Cadillac SRX (Including Export)
    2005-2010 Cadillac STS (IncludingV-Series and Export)
    Equipped with Limited Slip Differential (RPO G80)

    Condition
    Some customers may comment on a clunk and/or chatter type noise from the rear of the vehicle while making turns.

    This condition may be worse on vehicles built prior to the 2008 model year. Carbon-faced clutch plates were introduced into production in the 2008 model year and have decreased the likelihood of the clutch plate chatter.

    Cause
    This condition may be caused by slip/stick of the posi-traction clutch platesdue to insufficient limited-slip axle additive. As plates slip and stick, ajumping or jerking feel occurs accompanied by a clunk noise.

    Correction
    Important: DO NOT remove the differential cover. It is not necessary to flush the old fluid from the differential.

    Drain and refill the rear differential with fluid, GM P/N 88862624 (in
    Canada,88862625). Refer to the Axle Lubricant Change procedure in SI.

    This fluid includes a friction modifier already added with a different formulation that lasts longer and does not break down over time.

    Without Differential Oil Cooler
    1.10 L
    1.16 qt

    With Differential Oil Cooler
    1.41 L
    1.50 qt

    Parts Information
    Part Number

    88862624 (
    US-1 qt)
    88862625 (
    Canada
    - 1 L)
    DEXRON® LS Gear Oil


  7. #6
    Cadillac Cust Svc's Avatar
    Cadillac Cust Svc is offline Cadillac Customer Service
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    Re: GM Retiree. Cadillac Lover! New to the Cadillac Owners.com. Clunking problem in R

    Quote Originally Posted by teejcee44 View Post
    I have owned almost every make of GM vehicles, but am converted to Cadillac many times over, when I bought my first 03 CTS. Today I own an 09 CTS4 that is luxurious and fun to drive. I had a problem with handling on left turns at high speed on highway driving that was "driving" me crazy. I first thought it was a tire problem, since the problem became quite noticeable when I installed a new set of Michelin tires. After two times returning the vehicle to the tire shop that installed the tires. I went online (Alldata Pro) to look at TSB's, and found an article on this very thing. It was a safety recall which included a "clunking" noise in the rear, where a tie rod may work loose, and cause unsafe handling, which described exactly what I was experiencing. Turns out that the safety recall had already been done, but I finally took the vehicle to a Cadillac dealer in Batesville, AR, and they fixed the handling problem, but I still have a clunking in the right rear of the vehicle. Anybody have suggestions?

    Hello teejcee44,

    Welcome to the forum! This is a great way to interact with other Cadillac owners and lovers and get great insight. I am here to help monitor the sites and be a liaison between the customer and dealer. I also help answer any questions to the best of my ability, or get in contact with those that can further assist a customer. I can be reached via private message or at socialmedia@gm.com "ATTN LAURA" if there are any concerns or issues you would like to discuss further.

    Regards,

    Laura M.
    Cadillac Customer Service

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