Polyurethane tranny mount vibrations
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Teching In
Joined: Nov 2003
Posts: 23
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Polyurethane tranny mount vibrations So I put on a new energy suspensions polyurethane tranny mount and I am noticing HUGE vibration....like the coins in my cupholder (what little there is left) is acting like it's on speed....is this normal ??? Also @ 2500 rpm there is intense vibration.....and over 4000rpm forget about it......feels like my car is going to fall apart....... 
never done it in a LS1.....but I have had solid motor and tranny mounts on previous cars and loved them 
Caint hear the exhuast for the interior vibrating though.....but I dont think it is that bad.....I guess I have different opinion than some people as well though
Caint hear the exhuast for the interior vibrating though.....but I dont think it is that bad.....I guess I have different opinion than some people as well though
I've always heard that complaint with the poly mounts...Thats the disadvantage to the poly mounts. Its either dealing with the vibration, or just keep replacing the mushy-rubber mounts..After the mount is broken in, a little of the vibration will go away.
10 Second Club
Joined: Nov 2001
Posts: 1,724
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From: Fenton, MI
My PT4200 just about ripped my stock mount right in half after a few runs down the track. I replaced it with another stock one I had laying around. There are some mods you can do to the energy suspension poly trans mount that reduce the noise and vibration a lot. They really help, My buddy's car has the modded poly trans mount and it's hard to tell the difference from stock. I had an unmodded energy suspension mount in my old car and the noise and vibration from it was pretty annoying. I'm not sure what you're supposed to do to it, maybe try searching.
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Have had the ES poly trans mount in my '94 for years. Doesn't bother me. You have to realize you have to sacrifice a little comfort for performance parts. Granted the car is not a daily driver now, but it has been for periods in the past.
I have a poly tranny mount in my daily driver...If you want a smooth driving car, drive a lexus, if you want to feel a rugged V8 with a loud exhaust and lots of vibration....buy a muscle car.....i honestly think people complain too much
Originally Posted by FoRmuLa_DriVa
I have a poly tranny mount in my daily driver...If you want a smooth driving car, drive a lexus, if you want to feel a rugged V8 with a loud exhaust and lots of vibration....buy a muscle car.....i honestly think people complain too much
TECH Addict
Joined: Sep 2003
Posts: 2,065
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From: Atlanta, GA
try stock mush mount with pacesetters 
it will be bang city.
when properly installed i don't feel it. Then again after i put the suspension on my car feels more like a road race car than a buick so i dont leave the vibrations to the wife
it will be bang city.when properly installed i don't feel it. Then again after i put the suspension on my car feels more like a road race car than a buick so i dont leave the vibrations to the wife
Teching In
Joined: Jun 2004
Posts: 18
Likes: 0
From: Bakersfield, Ca
in my camaro the poly mount and the stall made for alot of vibration. i hated it. anyone that road in my car exspecialy girls thought it was fallin apart. my dad road in it after that was in and was like WTF is that.
took my poly trans mount out in one day.. HATED IT! way too much vibration, and for WHAT on my setup 
. i/you probably don't ******* need that **** on my SMOOTH MODERN v8 muscle car.
poly mounts are for REALLY badass car/ racecar only fwiw.
. i/you probably don't ******* need that **** on my SMOOTH MODERN v8 muscle car. poly mounts are for REALLY badass car/ racecar only fwiw.
TECH Apprentice
iTrader: (168)
Joined: Jul 2002
Posts: 359
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From: Chicago Far Far South Subs
I have Prothane motor, trans and torque arm bushings and have a little vibration/rattling in the shifter button. I can live with that since I want the exhaust tight to the car and no rattles from that
