I noticed a vibration on the gas pedal around 80 mph when the A/C cycles on and off. Has anyone had this same issue and if so what was the fix? Now that I have noticed it I can't stop feeling it while I am driving. Yes I do know what the speed limit is.

 

Mine had a vibration on the brake pedal. And of course when I took it in they couldnt find anything wrong with it.

 

I have noticed that in my truck when going down the highway every now and then (65-70 mph). I have not really worried about it. Maybe someone else will know?

 

Don't drive 80 mph.... try 78 or 82 just drive around it..

My drivers front tire bounces at 67 mph, nothing @ 65 or any speed above 68...
So I don't drive @ 67 mph NO Bounce

 

Only good probability I could give ya are torn/worn motor mounts, but even then, that is highly impossible.