What's the rattling noise on an A320?
Rattling that disappears after liftoff is normally associated with a vibrating tire transmitting vibrations up through the airframe, and causing some sort of interior panel that is a bit loose to rattle in sympathy.  On most airliners the brake system applies the main wheel brakes momentarily, once weight-off-wheels, to prevent the usual spin down vibrations during retraction (Nosewheels normally use a friction brake that contacts the tire when it's fully up for the same purpose).  So if the wheel is shaking and making other things shake it will stop as soon as you're airborne.

Airliner wheel assemblies are usually statically balanced vertically like motorcycle tires, not dynamically balanced on machines like car tires (I shudder to think of the cost of a dynamic balancer that can do wheels that big).  You can have a vibration mode that comes in at a certain tire RPM, so all of a sudden starts to shake, then you lift off and the brakes are tapped by the braking system to stop the  wheels, and the vibration stops.