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Poly Trans Mount good idea?

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Old Apr 9, 2005 | 09:14 PM
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Default Poly Trans Mount good idea?

I have a Custom Shift Kit that hits extremely hard on the 1-2 shift. The other night at the track, I had on some ET Streets. On the 1-2 shift on one of my runs, I swear I heard a "clunk" and felt something hit the floorboard, my guess is the trans mount.

Question is, if I get under there Monday and see that it is the mount, should I replace it with a poly? I've already got poly motor mounts, and I don't know if I want any more vibration. Would a good replacement rubber mount hold up for a little while? I'm on a stock stall, BTW.
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Old Apr 9, 2005 | 09:19 PM
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I used a poly mount for a few weeks and it vibrated too much for me. I am running the stocker now.


John
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Old Apr 9, 2005 | 09:30 PM
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Originally Posted by jet_black
I have a Custom Shift Kit that hits extremely hard on the 1-2 shift. The other night at the track, I had on some ET Streets. On the 1-2 shift on one of my runs, I swear I heard a "clunk" and felt something hit the floorboard, my guess is the trans mount.

Question is, if I get under there Monday and see that it is the mount, should I replace it with a poly? I've already got poly motor mounts, and I don't know if I want any more vibration. Would a good replacement rubber mount hold up for a little while? I'm on a stock stall, BTW.
I just put one in today because of my built tranny with the Transgo shift kit. It hits very hard between the shifts so I decided to try another one and it works just fine on this car. I had one on my stock LT1 when the tranny mount broke and took it off the same day so I guess it's a hit or miss. I think because of all the other suspension parts and loud exhaust hides the viberation feels much better on this car?
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Old Apr 9, 2005 | 09:36 PM
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Originally Posted by JNorris
I used a poly mount for a few weeks and it vibrated too much for me. I am running the stocker now.


John
As hard as you launch, how has it held up?
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Old Apr 9, 2005 | 10:23 PM
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Default poly want a cracker

don't waste the money, so much vibration that the knock sensors pulled toming.
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Old Apr 9, 2005 | 11:35 PM
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window weld- do a search on it-

my window welded stocker is PERFECT after sooooo many hard launches w/nittos.

minimal vibration, can be found at any auto paint store (it is used for putting car windshields in).

= costs 15$ and takes a couple days to dry...

i SWEAR the window weld thing should be a sticky. i don't see how anybody puts up with those poly mounts- i had mine for 2 days before i took it out.
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Old Apr 10, 2005 | 09:01 AM
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Originally Posted by jet_black
As hard as you launch, how has it held up?
It has been in there for 2 years and has held up well.
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Old Apr 10, 2005 | 11:02 AM
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With the poly it takes alittle while for it to loosen up. Mine was alittle tough at first, but doesn`t bother me at all. It will last longer for sure! I busted my stock mount right off. To much power with slicks!!
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Old Apr 10, 2005 | 11:44 AM
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for drag racing its a must.

for daily driving, tht would drive me insane.
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Old Apr 10, 2005 | 12:16 PM
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https://ls1tech.com/forums/new-ls1-owners-newbie-tech/303354-feel-vibration.html
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Old Apr 10, 2005 | 02:20 PM
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if u can find a 1LE tranny mount from GM i have 1 n both my cars and they r great. They r just a harder durometer of rubber and 1 side is closed instead of both bn open
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Old Apr 10, 2005 | 07:53 PM
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window weld
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Old Apr 10, 2005 | 08:15 PM
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i have a hard shiftin tranny with poly motor mounts and transmission mounts and i feel every freekin vibration my car has
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Old Apr 10, 2005 | 08:43 PM
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my Energy Suspension mount drives like a fat chick doing jumping jacks, it shakes everywhere. I believe mine also shakes so bad that it's detecting misfires and it causes my converter to randomly unlock sometimes
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Old Apr 10, 2005 | 10:01 PM
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Originally Posted by electricz28
don't waste the money, so much vibration that the knock sensors pulled toming.
you'll have to excuse me as that makes no sense to me at all.. you knock sensors are part of your motor.. tranny is bolted to motor.. common physics would tell you that if more vibration is transfered (absorbed) into the car less is done by the tranny.. either way.. if ur trannys causing enough vibration to cause knock you have a problem.. and its not your mount

Mike
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Old Apr 11, 2005 | 10:17 PM
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From: Brazoria
Default 1le

Originally Posted by 10secopcar
if u can find a 1LE tranny mount from GM i have 1 n both my cars and they r great. They r just a harder durometer of rubber and 1 side is closed instead of both bn open

use the same mount-never a problem
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Old Apr 12, 2005 | 12:36 AM
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Put the poly moun on this weekend and did as people said w/ the cutting and washers and I couldnt feel a difference.
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Old Apr 12, 2005 | 12:55 AM
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Did you take her over 100mph while pushing the car fast?
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Old Apr 12, 2005 | 01:06 AM
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I mean all the vibrations under normal driving. I dont go over 100 mph very much so if it feels bad up there ill be ok or are you talking about good qualities of it? im sure ill notice good things once I get on it more. letting the converter break in a bit b4 i get on it a lot. ie. drags or slicks.
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Old Apr 12, 2005 | 03:44 AM
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I like mine
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