poly mounts

[acomaelkhunter]

i put on some energy suspension motor mounts and tranny mount. my motor keep tearing the engine mounts. i having an intense vibration from the tranny. does this soften up with wear? thinking i my go numb driving!!

 

[MustangChris]

is this new since the bushings? or was it there before the bushings?

you should feel more than rubber bushings, but i'm all solid without those problems.

sounds like you may have a driveshaft thats bent, unbalanced, or equipped with bad u-joints.

 

[acomaelkhunter]

its new, since the bushings. it is the motor and not the drive shaft. it vibrates in neutral and in gear, while parked and rolling.. smooths out on high revs

 

[MustangChris]

check your harmonic balancer.

 

[acomaelkhunter]

the stock harmonic balancer had spin. replace with a summit racing balancer.

 

[MustangChris]

or just another OEM.... they last for a good 150k-200k miles. lol.

 

[acomaelkhunter]

it has a new harmonic balancer.

 

[MustangChris]

huh? so its already been replaced?


is your crankshaft internally balanced? if so, did you get an externally balanced H.B??

 

[acomaelkhunter]

crank is not internally balanced. the HB can be set up for internal/external balance... before the new hb the car was shaking like hell. it's smooth compared to before. but the poly bushing does amplify the vibration

 

[MustangChris]

how bad is it? any sounds coming from it?

 

[acomaelkhunter]

its not a shake, but a vibration...seems from the motor

 

[MustangChris]

so you feel it in the *gas pedal*? floor boards? steering wheel?

 

[D3VST8R96GT]

fly wheel?

 

[acomaelkhunter]

through the tranny mount

 

[JJhirsch]

I have poly motor and trans mounts and I get some steering wheel vibration at 50mph+ and it goes away when I put the clutch in and let the car rev down. Also when you are parked rev it to 2500 you will have vibration see if it is the same as when you are driving.

 

[JJhirsch]

Also look at your water pump. My 91 5.0 would vibrate bad untill I noticed the water pump bearings were shot.

 

[MustangChris]

have you kept your head under the hood while a buddy hits the gas pedal?

 

[RichV]

+1 for flywheel and/or clutch assembly.

 

[acomaelkhunter]

im thinking fly wheel as well...

 

[rz5.0]

I'm thinking new short block in your future..