chronism

I have a brand new 2011 GT with 1500 miles on it, and when I reach about 60mph I start to feel a slight vibration in the pedal, seat, floor board. Steering wheel is smooth as silk. Push the clutch in and it doesn't go away, so that would eliminate drivetrain I assume?

It is more noticable at 65 and 75 when just kinda cruising along and on a very smooth blacktop road. Any other road and it is masked by normal road vibration. It seems to disappear 80+.

It is very slight and only felt on the smoothest of roads. Did a test drive with a tech and they didn't notice anything out of the ordinary, but it wasn't really on a smooth road that I'm used to. They recommended having the tires road force balanced and I'm scheduled to do so.

Any other suggestions or input/advice about road force balancing and my issue?

wingless

The Hunter GSP9700 Road Force Balance machine is the way-to-go. It is the only way I roll...

Also perform an inspection for tire / wheel defects / damage.

The tire / wheel runout is easy to observe when on the machine.

wingless

When I have mine done, I bring my own aero weights and request usage of the extended menu to split the weights to hide behind the spokes.

chronism

Thanks for the reply, I would hope they would not use outside weights on these wheels but I will confirm prior.

I'm more curious, do my symptoms sound like a wheel tire issue or something else? If tire, I assume the rears since I don't have any vibration in the steering wheel? Is it common to get unbalanced wheels tires on a new car from the factory? I thought they used road force themselves?

jz

Eh, the car is probably junk. I'll take it off your hands and free you of the burden.

J/K, nice car though. I'm not a big fan of the '10+ but I really like yours in white. Looks nice!

Anyway, I would also assume a slightly imbalanced tire. Hopefully that fixes it for you.

randeez11

I have been lurking on the site for a while and have not posted. read this post and had to reply. I have a new Mustang GT and my car has exactly the same probem as desciribed here. I tried to explain it to the dealer. They kept the car for 3 days and drove it about 20 miles. They said everything was "normal". But it isnt. There is a gut feeling vibration that just doesnt feel right. The dealer did say there was a "drone" not a vibration. They said if the steering wheel was not shimmying, that the tire balance was ok. Again, they said they compared it to a demonstrator and all was nornal for the model. I have tried to get used to it but I feel it everytime I take the car on the highway.

chromebluestrat

There is another thread with very same problem as yours it would seem.
https://mustangforums.com/forum/2005...-to-today.html

onederful100

what gear are you in and what rpm are you at with the vibration.
you said it goes away above 80. hmmm.

Soldier GT

Have you taken the car back to the dealership and asked them to check it out? Good luck..

onederful100

are you lugging the engine?