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2009-2014 Cadillac CTS-V General Discussion Discussion, Getting my Differential rear end carrier replaced on Friday in Cadillac CTS-V Series Forum - 2009-2014; Originally Posted by the blur Yes, the car my melt. Did you ever see what GM does to this cars ...
  1. #46
    Trapspeed's Avatar
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    Quote Originally Posted by the blur

    Yes, the car my melt.
    Did you ever see what GM does to this cars right off the assembly line ????????????? "full load testing"
    My post was in response to the question posed. Not saying I follow(ed) all of it. Half swear by it, half don't.

  2. #47
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    Re: Getting my Differential rear end carrier replaced on Friday

    GM takes engines right off the assembly line, and runs them at WOT, until they run out of gas.

  3. #48
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    Quote Originally Posted by the blur

    Yes, the car my melt. at a lster
    Did you ever see what GM does to this cars right off the assembly line ????????????? "full load testing"
    Get a clue, the break-in period has to do with the differential, transmission parts getting used to each other; it's been repeated many, many times on this forum. Learn now before it becomes embarrassing at a later age. A little correct spelling will go a long way, too.

  4. #49
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    Re: Getting my Differential rear end carrier replaced on Friday

    Quote Originally Posted by JFJr View Post
    Get a clue, the break-in period has to do with the differential, transmission parts getting used to each other; it's been repeated many, many times on this forum. Learn now before it becomes embarrassing at a later age. A little correct spelling will go a long way, too.
    Nice run on sentence. 6th grade English goes a long way.

  5. #50
    medici78 is offline Cadillac Owners Member
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    Re: Getting my Differential rear end carrier replaced on Friday

    Sorry to bring up an old thread but our '12 CTS-V Wagon has a faint whining/humming noise constantly over 40mph. It happens when on the throttle and cruising, but goes away off the throttle. In addition, I feel some slop in the drivetrain if I let off the gas over 60mph and get back on it. Could this be the same issue? Recently had the supercharger replaced, so I'm wondering if these are just items to begin looking for on any CTS-V.

  6. #51
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    Quote Originally Posted by medici78
    Sorry to bring up an old thread but our '12 CTS-V Wagon has a faint whining/humming noise constantly over 40mph. It happens when on the throttle and cruising, but goes away off the throttle. In addition, I feel some slop in the drivetrain if I let off the gas over 60mph and get back on it. Could this be the same issue? Recently had the supercharger replaced, so I'm wondering if these are just items to begin looking for on any CTS-V.
    Mine was most noticeable at 35-40 and had the same characteristics you describe. It was harder to hear the faster I went.

  7. #52
    WhoseCadillacIsThat is offline Cadillac Owners Fanatic
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    Re: Getting my Differential rear end carrier replaced on Friday

    This '11 had the rear end whine above 55 which I considered pretty cheesy for a vehicle of this caliber and supposed supreme quality. We really like the car and have had a few other issues repaired, replaced or 'fixed' that were disheartening to have happen to a brand new vehicle; but warranty took care of them.

    The rear end whine has now turned into a constant roar and reading these posts causes some alarm about what is going on. Will warn tires make this roar? We still have the Michelin's and we're at almost 19K - end of life for these 20k tires so I was thinking that the tires were causing the noise. Could this be? We were intending to replace the tires very soon anyhow...

    Thanks, hope someone has been through this....

    BillC

  8. #53
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    Re: Getting my Differential rear end carrier replaced on Friday

    I just noticed a slight "roar" myself, with 44K on my 2009. I have to have the windows up, and the radio off to hear it though. I didn't notice it until I put the summer tires back on, so I'm wondering if it just tire noise. Can you hear the rear end whine easily over road noise?

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    Quote Originally Posted by baabootoo
    I just noticed a slight "roar" myself, with 44K on my 2009. I have to have the windows up, and the radio off to hear it though. I didn't notice it until I put the summer tires back on, so I'm wondering if it just tire noise. Can you hear the rear end whine easily over road noise?
    At 35-40, I certainly could.

  10. #55
    WhoseCadillacIsThat is offline Cadillac Owners Fanatic
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    Re: Getting my Differential rear end carrier replaced on Friday

    Quote Originally Posted by baabootoo View Post
    I just noticed a slight "roar" myself, with 44K on my 2009. I have to have the windows up, and the radio off to hear it though. I didn't notice it until I put the summer tires back on, so I'm wondering if it just tire noise. Can you hear the rear end whine easily over road noise?
    We noticed right away that these PS2's are noisy. Seems like running over a dime makes a thud... Stiff sidewall. I don't hear the whine as pronounced as before but it is still there but is being overtaken by the roar. Thing is, if this is tire noise then it is getting progressively worse but if it's rear end noise we have a differential housing full of that dreaded silvery lube laden with metal. I must get this car to the dealer, get the tires replaced, get the noise checked out. The dealer sent me an offer to buy back the car and I've thought about taking up on that - but damn I like this car!

  11. #56
    spearfish25 is offline Cadillac Owners Enthusiast
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    Re: Getting my Differential rear end carrier replaced on Friday

    The diff problem is more of a whine that changes with speed. Typical speed range is 40-60mph. It's distinct from the rear of the car. In terms of sound quality, think of riding around in a shitty taxi with 100k miles on the odometer or a 4x4 truck with the transfer case in low range driving at slow speed.

    Worn tires can be very noisy. It's more diffuse sounding, increases with speed but is present at all speeds and can be accentuated with maneuvers like braking hard (putting more weight on worn front tires) or cornering at speed (again, increasing the weight/pressure on worn tires).

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    Re: Getting my Differential rear end carrier replaced on Friday

    Thanks all.

  13. #58
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    Re: Getting my Differential rear end carrier replaced on Friday

    Quote Originally Posted by WhoseCadillacIsThat View Post
    This '11 had the rear end whine above 55 which I considered pretty cheesy for a vehicle of this caliber and supposed supreme quality. We really like the car and have had a few other issues repaired, replaced or 'fixed' that were disheartening to have happen to a brand new vehicle; but warranty took care of them.

    The rear end whine has now turned into a constant roar and reading these posts causes some alarm about what is going on. Will warn tires make this roar? We still have the Michelin's and we're at almost 19K - end of life for these 20k tires so I was thinking that the tires were causing the noise. Could this be? We were intending to replace the tires very soon anyhow...

    Thanks, hope someone has been through this....

    BillC
    Hello WhoseCadillacIsThat,
    I can understand how this can pose a concern and be alarming. Have you brought this to your dealership’s attention? If you would like me to reach out to them on your behalf, please let me know. Just send me a private message including your VIN, contact information and the dealership you would like to work with. I look forward to hearing from you soon.
    Katie O.
    Cadillac Customer Care

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