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new tranny mount

This is a discussion on new tranny mount within the Drivetrain forums, part of the LSx Technical Help Section category; so i was going to buy a tranny mount ws6 store has 2 options... energy suspension and prothane.. which should ...

  1. #1
    Junior Member JadedBird's Avatar
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    new tranny mount

    so i was going to buy a tranny mount
    ws6 store has 2 options... energy suspension and prothane..
    which should i choose?
    i have poly motor mounts so should i go poly on the tranny mount as well?

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
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    both are poly, energy suspension has a good rep. I've gotten a set of their engine mounts and after pulling the tranny & engine last night I know I need to add a tranny mount to my parts list.

  3. #3
    LS1 or bust b.lee's Avatar
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    The car is going to viberate more so just be ready for that
    At idle, driving down the road, freeway, etc

    If you dont want any extra vibration, use a stock mount

  4. #4
    Senior Member tatertot91's Avatar
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    Sunset Orange Metalic
    2001 Camaro SS

    My Prothane vibrates a lot less than my buddy's Energy Suspensions one. He ended up going back to stock he hated it so much. It's all a matter of opinion but i like my Prothane one.

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    The poly mount in our car lasted a couple of days before I yanked it and threw the stocker back in. Way too much vibration imo.

  6. #6
    expensive tires az gt eater's Avatar
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    It will chatter/vibrate at certain RPM's. I like mine, but I also like the noise and vibration. Lets you know you got something alive under the car.

  7. #7
    Junior Member JadedBird's Avatar
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    well. my tranny sure moves around alot and i could litterally sword fight with my shifter
    my poly engine mounts are doing fine and i dont mind them. but maybe ill try the poly. if worse comes to worse, ill just jack it up yank it out and throw a stock one back in there

  8. #8
    Spaz is My Mentor SMWS6TA's Avatar
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    Quote Originally Posted by b.lee View Post
    The car is going to viberate more so just be ready for that
    At idle, driving down the road, freeway, etc

    If you dont want any extra vibration, use a stock mount

    I think after I finish throwing in this 6L with a Polluter Stage 3 cam Iim building the vibrations aren't going to matter anymore

  9. #9
    Spaz is My Mentor SMWS6TA's Avatar
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    Quote Originally Posted by pajeff02 View Post
    The poly mount in our car lasted a couple of days before I yanked it and threw the stocker back in. Way too much vibration imo.
    was this before or after the SFC's Do you have the TA still on the tail cone?

  10. #10
    Junior Member JadedBird's Avatar
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    Yeah i have sfc installed already and im currently building an ls2 with a l92top end cammed to make 450+

  11. #11
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    Quote Originally Posted by SMWS6TA View Post
    was this before or after the SFC's Do you have the TA still on the tail cone?

    After 2 point SFC's and installation of a tunnel mount torque arm. It seriously sucked.

  12. #12
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    2002 Camaro Z28

    Please allow me to take this thread off on a tangent. I am going to install long tube headers soon and have read this is the time to do motor mounts. Everything I have read says go with poly motor mounts. I assumed the trans mount would be changed to poly at the same time. So, you guys are using poly motor mounts and rubber trans mount?

  13. #13
    Sold: LS1 '85 El Camino ls1camino's Avatar
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    Vibrations = fun

    They don't bother me at all.

  14. #14
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    '02 WS.6 / '07 Suburban

    Poly engine mounts and a stock rubber trans mount here. No issues at all.

  15. #15
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    Midnight Blue
    2002 Camaro Z28

    So the difference in mount material will not cause cracking of the trans case? I recall reading somewhere that could be an issue because the front of the motor/trans assembly is not allowed to vibrate as much as the back half causing issues. It has been a long time since I looked into the benefits of different mount types, so please bear with me.

  16. #16
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    << If launching our car at the track like this hasn't broken the transmission case, I am guessing that is nothing more than an unfounded rumour. If anything, the poly mounts better dampen and absorb the side-to-side movement which would be the torsional stress on the engine and transmission. The trans mount is simply here to hold up the back of the engine and transmission assembly.

  17. #17
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    I installed the Poly motor and trans mounts. Can't keep change in the ashtray any more, that jingles and rattles like crazy. I have noticed a shaking/ excessive vibration at 45 mph in 4th gear, shift to 5th and it goes away. I think it will be bearable. I just hate the conversations w/ every person that rides in the car.

    "What's wrong with your car?"
    "Nothing, it has poly mounts"
    "What are those?"
    "UGH"

  18. #18
    Member blackcar's Avatar
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    Can everyone say which tranny mount (brand) they used, if the are a4 or m6, and the vibration?

    I used Prothane motor and trans on my m6 and didn't notice much difference in vibration. My shifter quit moving around and not much more (if any) vibration. I do have a little nosie I didn't have before, but only when my foot is not on the clutch and it is ideling. Like at a red light.

  19. #19
    Former Mopar Man 2002ssslp's Avatar
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    Poly mounts are the best.
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

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