Engine_HP

iTrader: (1)

hows is it going ?

99puterss

iTrader: (7)

iono changed the tranny mount from poly to stock and its driveable now lol all it did was dampin the vibration. i think i know what it is but i gotta pull the trans out i think the flange on the end of the crank might be warped or something so im going to put a indicator on it and see where its at.

Engine_HP

iTrader: (1)

you mean the flang that the clutch gets put on ? NAh i really dont think its the flange but its worth a shot,

Low02

iTrader: (14)

The poly mounts do amplify the vibration. Im almost to the point where i think mine has been there for awhile, and when i did the polys it just amplified it. But the initial vibration has to come from somewhere. I ordered a March dampener, i really hope that fixes it. If not ill probably change the trans mount out like you did and see if i can live with it too. Ive lived with it the way it is now for a year now, but it just got to where it wasn't fun to drive anymore. Hope you figure it out.

99puterss

iTrader: (7)

o god i know what u mean changing the trans mount made me actually somewhat enojoy driving it again were before i hated driving it

Engine_HP

iTrader: (1)

couldn it be ur exhaust pipe hitting ur chasse somewhere ?

Engine_HP

iTrader: (1)

bump

https://ls1tech.com/forums/automatic...l#post11054103

read it all

ssean92

iTrader: (8)

I have a lt1 383 and once i put the poly trany mount I feel everything. I hate this mont but I keep breaking the runbber ones, so I am stuck with it.

Engine_HP

iTrader: (1)

how did it go ?

DaddySS

I would do a cylinder balance test - it sounds to me like firing issue, not a balance issue.

KurtRardin

iTrader: (11)

Subscribing. I bet its more internal. When I did my clutch I also put in a poly trans and torque arm mount, already had poly engine mounts in. It really amplified the noise/vibration coming from my 10 bolt . To the point where I don't even like driving above 60mph. Next mod: Midwest Rear.

Poly trans mount did make it harsh, but it also made the car more stiff and feel less mushy.

Good luck finding it! Junkyard 6.0s are pretty cheap...

kmmblackbird77

I just bought a 2000 Trans Am and I am having the same issue... Did you ever track down where the vibration was coming from?? I have the poly mounts, tourqe are, pan hard, sub frame connectors and everyone is saying that is where my vibration is coming from...

KurtRardin

iTrader: (11)

I ended up taking my poly trans mount out and it made it so much nicer to drive. It vibrated like crazy before.

Poly engine mounts =

Poly engine mounts + poly trans mount =