2009 Tribute vibrate on accel pedal

[brisha]

2009 Tribute 4cyl FWD has about 6000KM

it has weird vibration when it reaches 70Km/h from the pedal. it only happens once after starting the vehicle.

What would cause this?

 

[b230094]

Maybe a vibration from the engine? If it keeps it up I'd have the dealership have a look!