Gearbox interior rattle

[Threllyp]

Hello all

My corsa is only just over two months old now and it has started to develop a rattle in third gear from around the gearbox/gear lever. It only happens under string acceleration when overtaking or picking up speed for example, and seems to stop if I keep my hand on the gear lever itself.

Took it back to vaxuhall today and they have said they cannot find any fault with it.

Has anyone else had the same issue and does anyone have any idea how to fix it?

Thanks