feels like tranny vibration

[69learpilot]

I have a 94 GT with the automatic in it.It has a B-303 cam in it and for some reason when you are going down the road and it loads up it starts a vibration.If you let off of it and get on it again the vibration is gone.Any ideas?

 

[wytstang]

Sounds like bad plug wires to me. What condition are the wires in?

 

[69learpilot]

they are in great shape there are brand new motorsport wires

 

[BlackVert]

subscribing because i have a similar symptom, but not exactly the same.

on mine, it is fine until about 60 mph, and it doesn't vibrate while accelerating, but when i let off the gas and coast or cruise (still above 60), it vibrates. but it doesn't happen everytime.

 

[mystang94gt]

I have a 94 GT with the automatic in it.It has a B-303 cam in it and for some reason when you are going down the road and it loads up it starts a vibration.If you let off of it and get on it again the vibration is gone.Any ideas?

I also have the same kinda thing. It vibrates usually when I am rolling along off the gas and try to give it just a bit of throttle. If I let off or punch it hard it wont do it. I'm not sure if my tranny is going out or what but the shifts feel firm and it doesnt slip.

 

[5literstang]

harmonic balancer might be goin bad maybe??

 

[94Silverbullet]

subscribing because I have a similar problem also.

it did it before my new tranny, and does it now. Also before and after my AL driveshaft. Also, when tires have been changed.

Crazy question, can it be something in the motor causing the car to vibe like that? Mine happen when the rpm's and/or the speed are high.

You can check your u joints?

 

[BlackVert]

i was thinking it might be a wheel out of balance or something like that.

 

[mystang94gt]

harmonic balancer might be goin bad maybe??

I know my H.B. is bad for a fact. Is that something that would cause this?