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Thread: Drivetrain drone and GM service

  1. #31
    Join Date
    Oct 2003
    Posts
    46

    Re: Drivetrain drone and GM service

    Rear end whine is an all too common problem with the CTS and SRX. GM is definitely aware that there are many complaints in the field. There are two possible problems, a noisy gearset in the rear end or a leak (most often from the side cover seal) which causes the gearset to become noisy. If there is a leak, repair of the side cover seal and replacing lost fluid sometimes fixes the problem. If you don't have a leak, then the only fix is to replace the rear end.

    If you can get your dealership to replace the rear differential, try to take it easy for the first 500 miles. It is no gurantee, but it is recommended by the supplier.

    Rear end whine is not "normal" but it is common. It is one of the highest warranty items on the CTS/SRX.


  2. #32
    Join Date
    Jan 2003
    Location
    Alexandria, VA
    Age
    34
    Posts
    3,684

    Re: Drivetrain drone and GM service

    i took my cts to lindsay and went out for a test drive with a tech. He acknowledged that there is a rear diff around at the speeds that i described and he will call gm for a solution (according to my service manager yesterday, my rear diffs are going to be replaced but it will be another week they get another rear diff in).
    Hey wagoneer, try lindsay cadillac in alexandria, va.

  3. #33
    Join Date
    May 2004
    Location
    Princeton, NJ area
    Posts
    153

    Re: Drivetrain drone and GM service

    The dealer just returned my SRX to me today, after working on the car for 10 days. I did not get to talk to the technician, but the invoice makes it look like they replaced every shim in the drivetrain. There were about 10 different shim part numbers on the list. The invoice noted that one of them in particular is a different size than the original.

    The results are not perfect, and I'm skeptical how long they will last. The noise used to occur starting at around 50 mph, and be particularly noticeable around 60 and 70. It is now quiet around 60, but can be heard softly at around 70. As I mentioned in my initial post, the dealer's policy is that they cannot diagnose or repair problems that occur at speeds above 65 (the maximum in Maryland), so I might be SOL if it continues to bother me but only at higher speeds. I have not tested sufficiently to determine if there are other speeds where the problem still occurs.

  4. #34
    Join Date
    Jun 2004
    Posts
    20

    Re: Drivetrain drone and GM service

    It might warrant a trip across a border to a state that has a more progressive speed policy.

  5. #35
    Join Date
    Jan 2003
    Location
    Alexandria, VA
    Age
    34
    Posts
    3,684

    Re: Drivetrain drone and GM service

    Quote Originally Posted by 67Yv8t
    It might warrant a trip across a border to a state that has a more progressive speed policy.
    i asked the mechanic that went out for a ride with me if that was true and he said they are not allowed to break the law but they still do little bit over highway speed (also they use hov lanes on 395 where posted speed limit is 65)

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