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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Flex Disc in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Hey guys, I was wondering if there was any way to put the flex disc on wrong. I had my ...
  1. #1
    smoovbro10 is offline Cadillac Owners Member
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    Flex Disc

    Hey guys, I was wondering if there was any way to put the flex disc on wrong. I had my front one replaced and now I'm getting vibration between 35-50 mph. Any input would be appreciated.

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    DavidBoren's Avatar
    DavidBoren is offline Cadillac Owners Fanatic
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    Re: Flex Disc

    Did you have it done by an autorized Cadi mechanic?
    Did you replace your transmission mount at the same time?
    If not, some shadetree mechanic or backalley businessman may not have properly aligned everything when he was done, which can require washers or shims to raise the transmission so the driveline is at the proper angle. RevShift makes a reinforcement block that gets inserted into the transmission mount (assuming you have an automatic transmission), that will keep the transmission from sagging, which is a common problem for our cars.

  4. #3
    CTSM is offline Cadillac Owners Enthusiast
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    Re: Flex Disc

    Hmmm, yes it's definitely plausible that the bolts were not put the right way....best way to be sure and stop the guess work is to get under there, snap a pic and let us take a look.

  5. #4
    smoovbro10 is offline Cadillac Owners Member
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    Re: Flex Disc

    Yes, I did replace the trans mount. The flex disc is OEM. I'll check the bolts. I read another thread where the bolts had to be retorked to specs.THX.

  6. #5
    RippyPartsDept's Avatar
    RippyPartsDept is offline Hi, I'm Chris - Please Read My Signature
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    Re: Flex Disc

    where'd you get an OEM flex disc?
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    smoovbro10 is offline Cadillac Owners Member
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    Re: Flex Disc

    I got it form a guy who had wrecked his CTS. It only had 70,000 miles on it. Disc was in mint condition. It fixed my clunk prob. but I was getting the vibration. I had the bolts redone and all is well.

  8. #7
    RippyPartsDept's Avatar
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    Re: Flex Disc

    ah ok... i was going to say you can't buy those...
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    Bluehaze07 is offline Cadillac Owners Connoisseur
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    Quote Originally Posted by smoovbro10
    I got it form a guy who had wrecked his CTS. It only had 70,000 miles on it. Disc was in mint condition. It fixed my clunk prob. but I was getting the vibration. I had the bolts redone and all is well.
    Hey, which direction did you install the bolts? Facing the front of the car or away from the front.

  10. #9
    smoovbro10 is offline Cadillac Owners Member
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    Re: Flex Disc

    Away from the front

    ----------

    Is there a certain way that the bolts have to go?

  11. #10
    CTSM is offline Cadillac Owners Enthusiast
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    Re: Flex Disc

    Quote Originally Posted by Bluehaze07 View Post
    Hey, which direction did you install the bolts? Facing the front of the car or away from the front.
    Quote Originally Posted by smoovbro10 View Post
    Away from the front

    ----------

    Is there a certain way that the bolts have to go?
    Nope, I know that some face the front and some face the back.

    Here's a pic icaddy has just posted of his CTS..the pic is taken from behind the differential.



    Here's a sample pic from RevShift of how their polyeurethane flexdiscs are installed (might not be a pic of a CTS disc in the pic but it's linked to the CTS though)



    https://www.revshift.com/shop/flex-disc-install.php

  12. #11
    Bluehaze07's Avatar
    Bluehaze07 is offline Cadillac Owners Connoisseur
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    Quote Originally Posted by smoovbro10
    Away from the front

    ----------

    Is there a certain way that the bolts have to go?
    Mine is set up the same way. I still have vibrations between 60- 70. I didn't think I can do alternating directions in the disk by the diff but it's on that pic....hmmm. I wonder if that can change the balance/alignment.

  13. #12
    RippyPartsDept's Avatar
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    Re: Flex Disc

    alternating direction is correct
    if you check the parts illustrations it will show this
    it's a bit tricky since you have to check more than one illustration





    at the font side the bolts facing forward go to the trans and the bolts facing back go to the driveshaft
    at the rear side the bolts facing forward go to the driveshaft and the bolts facing rear go to the diff/pinion flange

    i'm not sure if that helps with balance but it wouldn't surprise me if it did make a difference
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  14. #13
    Bluehaze07's Avatar
    Bluehaze07 is offline Cadillac Owners Connoisseur
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    Quote Originally Posted by RippyPartsDept
    alternating direction is correct
    if you check the parts illustrations it will show this
    it's a bit tricky since you have to check more than one illustration

    at the font side the bolts facing forward go to the trans and the bolts facing back go to the driveshaft
    at the rear side the bolts facing forward go to the driveshaft and the bolts facing rear go to the diff/pinion flange

    i'm not sure if that helps with balance but it wouldn't surprise me if it did make a difference
    I will defiantly fix this one I get the replacement flex disk in. Thanks Chris!!

  15. #14
    454Casull is offline Cadillac Owners Fanatic
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    Re: Flex Disc

    Usually it's a good idea to replace all the giubo joints at once, including the mount and bearing.

  16. #15
    Bluehaze07's Avatar
    Bluehaze07 is offline Cadillac Owners Connoisseur
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    Quote Originally Posted by 454Casull
    Usually it's a good idea to replace all the giubo joints at once, including the mount and bearing.
    Yeah, I changed out my diff mount bushing, gubio flex disk and trans mount.

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