Little bit of noise in between gearchange

[1975DCS]

When I drive away gentle with light throttle movements and I lift the throttle especially when making gearchanges between 2.500 - 3.000 rpm there seems to be some noise. Maybe it occurs on other occasions to but this is when it is most notable. The noise is about the same as some water splashing to the wheelarches or like some slight airleak noise or maybe even something still rotating like an electro engine. Any ideas on this strange matter?

[Dan_s2_coupe]

By the sounds of it it sounds a bit like mine can u get it when u just rev up out of gear

[1975DCS]

Yes! last time I was nearly home and put the car to a standstill reved it up slightly and released throttle suddenly and it sounded about the same...