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Polyurethane transmission support

This is a discussion on Polyurethane transmission support within the Drivetrain forums, part of the LSx Technical Help Section category; How much? Who caries them? And is it worth the change?...

  1. #1
    Junior Member enjun's Avatar
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    Red/Black
    1999 SS SLP#1507

    Polyurethane transmission support

    How much? Who caries them? And is it worth the change?

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  3. #3
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    More vibration, stiffer shifts. Most of the time if you keeping it somewhat stock I would go with the stocker. I broke my 1le mount in half and then broke my torque arm mount so I replaced with the energy suspension brand. A lot more random vibration and noise, prothane also makes a mount(have one as a spair).

    ws6 store has the prothane.. maybe even on of our sponsors, any auto parts store with have the energy suspension.

  4. #4
    Senior Member INMY01TA's Avatar
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    2001 Trans Am (sold)

    The vibration/noise is harsh at first, but does soften over time.

  5. #5
    Senior Member JaycenK's Avatar
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    1997 Camaro Z-28

    If you have a shift kit it is a must because you will break the stock rubber in less time than you think and that leads to other problems like broken motor mount ruber as well.

  6. #6
    Just a souped up sunfire. Ryans99LS1's Avatar
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    99 Trans Am

    i put a new stock one in and within an hour i tore through it... went with a prothane and after it softened up i love it. although somehow, i managed to snap the bolt coming through the crossmember when i powershifted the other day.. im thinking it was a factory flaw

  7. #7
    Member Justin93's Avatar
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    PEWETER METALIC
    2002 CAMARO Z-28 M-6

    To the Op, with my poly mount it does vibrate the car quite a bit more, however it doesnt bounce around or get drivetrain hop like it did before.

  8. #8
    Member side2000's Avatar
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    2000 camaro ss

    theyre cheap from summit, yes they're worth it. i have poly and solids EVERYWHERE there was fact rubber.

  9. #9
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Quote Originally Posted by Ryans99LS1 View Post
    i put a new stock one in and within an hour i tore through it... went with a prothane and after it softened up i love it.
    Same thing happened with me. I had the 1le mount originally and got a 15 bucks autozone stock ls1 replacement and i ripped the bolt outta it after it hooked hitting second after about 30 minutes.. lol

    I know the energy suspension model has a safety feature that prevents the bolt from comming all the way out.

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