Looking for some advice, please. Neither Ford UK, nor the dealer have been of much assistance in finding out what is causing this issue.

I have a Focus Titanium, fourth generation.

When changing up from second gear to third, and third to fourth, when I release the clutch pedal after changing gear, I hear a tap from under the gearbox. But no tap from fourth to fifth and fifth to sixth. And it only happens when the engine is warm, so most of the time of course. The sound isn't loud. It's a clunk but not a loud one, more tap. I've never heard it in other makes and models of car, which seem to have silent gear changes. Changing up through those gears is just a bit tappy and rattley, as I like to describe it. I've had the car almost a year, and love driving it. The sound hasn't got any worse. The dealer dismantled the gearbox last November and found nothing. It sounds like the noise from plates engaging or disengaging (I'm no expert). It may very well not be a fault, but I'd like to know what causes it.

If I increase the revs a little before releasing the clutch there is no tap. But normally you don't increase revs until after releasing the clutch, so it's not something I want to keep doing.

When changing down through those gears I almost never hear the noise.

Anyone know what this is, or has experienced it themselves?