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polyeurothane mounts

This is a discussion on polyeurothane mounts within the General Help forums, part of the LSx Technical Help Section category; just now got to drive my car after i did a poly tranny and poly torque arm mount. my buddy ...

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    cammed & slammed Kaotic_ws6's Avatar
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    polyeurothane mounts

    just now got to drive my car after i did a poly tranny and poly torque arm mount. my buddy told me that there would be more interior noise and vibration... but its horrible

    and now whenever i punch it, it feels like something is binding/ rubbing and holding my car back from its power, DOES NOT feel like motor problems. and my tires did rub alittle before but that shouldnt have gotten worse i dont think.... any suggestions or somethin yall know that i dont? PLEASE HELP
    1999 mbm Z m6/ forged 346, lt's, wires, ls6 intake, sts rear turbo.

    *SOLD*2002 black ws6- <Bolt ons, ls6 heads, mild cam, dyno tune, full susp. and 4.10s> --440rwhp/395rwtq

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    79 T/A -91 Firebird
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    Poly transmission mount.. what brand?

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    cammed & slammed Kaotic_ws6's Avatar
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    Quote Originally Posted by JoshieDoom View Post
    Poly transmission mount.. what brand?
    energy suspension, same brand as the torque arm mount. both from speed inc.

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    Quote Originally Posted by Kaotic_ws6 View Post
    energy suspension, same brand as the torque arm mount. both from speed inc.
    did you grind down the nubs and not use the backing plate???

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    cammed & slammed Kaotic_ws6's Avatar
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    Quote Originally Posted by JoshieDoom View Post
    did you grind down the nubs and not use the backing plate???
    the backing plate that goes on the inside? yea i used it

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    Quote Originally Posted by Kaotic_ws6 View Post
    the backing plate that goes on the inside? yea i used it
    Yep thats why.. lol.

    Lots of people have had issues with them. Take it back out and grind the two rubber nubs flat and dont use the backing plate. It will solve most of the issues.

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    cammed & slammed Kaotic_ws6's Avatar
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    Quote Originally Posted by JoshieDoom View Post
    Yep thats why.. lol.

    Lots of people have had issues with them. Take it back out and grind the two rubber nubs flat and dont use the backing plate. It will solve most of the issues.
    no not the backing plates that were on the old mount. i just thought you meant the inner peice that clamps onto the torque arm mount

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    Quote Originally Posted by Kaotic_ws6 View Post
    no not the backing plates that were on the old mount. i just thought you meant the inner peice that clamps onto the torque arm mount

    No the transmission mount, there are rubber nubs on the ES model and a backing plate. It causes the driveshaft to vibrate.

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    cammed & slammed Kaotic_ws6's Avatar
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    Quote Originally Posted by JoshieDoom View Post
    No the transmission mount, there are rubber nubs on the ES model and a backing plate. It causes the driveshaft to vibrate.
    ohhhhhh so get rid of the nubs? there like 2 right? why would they put them there if they screw up

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    Quote Originally Posted by Kaotic_ws6 View Post
    ohhhhhh so get rid of the nubs? there like 2 right? why would they put them there if they screw up
    Its a universal mount.

    No backing plate or nubs and it will be much more tolerable.. PLUS it does break in over time. I DD mine.

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    cammed & slammed Kaotic_ws6's Avatar
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    Quote Originally Posted by JoshieDoom View Post
    Its a universal mount.

    No backing plate or nubs and it will be much more tolerable.. PLUS it does break in over time. I DD mine.
    me too. thanks alot, so yours did tht at first too?

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    Quote Originally Posted by Kaotic_ws6 View Post
    me too. thanks alot, so yours did tht at first too?
    yes

    It will be rougher regardless but it was droning so bad at first from vibrating.

    Like something metal on metal

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    Senior Member TransAm11973's Avatar
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    yes i ground the 2 nubs and didnt use the plate.....and i love my es mount
    I have both the TA mount and the trans mount
    do like joshie said and you will be fine.

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    cammed & slammed Kaotic_ws6's Avatar
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    so yall think thats what my car was doin? reacting to that by the driveshaft vibrating and making my car run weird

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    Senior Member TransAm11973's Avatar
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    most likely, those 2 bumps in addition to the plate, add decent thickness, which changed the shaft angle. most likely causing your vibrations. Now remember with poly mounts you will have more vibration then you would with a stock mount, but it should be tolerable. Not anywhere near as bad as you are describing it. Take off the plate and grind down the bumps and put it back on, you should be quite happy with the difference

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    cammed & slammed Kaotic_ws6's Avatar
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    Quote Originally Posted by TransAm11973 View Post
    most likely, those 2 bumps in addition to the plate, add decent thickness, which changed the shaft angle. most likely causing your vibrations. Now remember with poly mounts you will have more vibration then you would with a stock mount, but it should be tolerable. Not anywhere near as bad as you are describing it. Take off the plate and grind down the bumps and put it back on, you should be quite happy with the difference
    yea i just got done with grinding them down and i removed the backing plate, so when i drive it to work in the mornin hopefully its all better. ill let you guys know. thanks ALOT for helpin me out, cuz i never would have thought of that

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    That guy thearborbarber's Avatar
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    Quote Originally Posted by TransAm11973 View Post
    yes i ground the 2 nubs and didnt use the plate.....and i love my es mount
    I have both the TA mount and the trans mount
    do like joshie said and you will be fine.

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    Junior Member dpeach's Avatar
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    i just ordered my trans mount and ta mount glad i have this info for when i install.

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    Retired NOT tired SteveC's Avatar
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    The Prothane mount is more vehicle specific, no bumps, no plates, no bull$h*t.

    SteveC

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    cammed & slammed Kaotic_ws6's Avatar
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    i drove it this mornin and yea the vobrations are tolerable.. and problem fix.. do think clutch is slippin tho cuz sometimes when i punch it it feels like the clutch is slippin or somethins rubbin bad. but i have a good centerforce clutch and slave with less than 10,000 miles

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