Rattles in the sliding operation

Hi guys, I have a little problem, you might have a few tips. I drive an Audi 80 B4 Bj. 94, 170tkm So if the car is really warm (so after about 20-30km) there is a rattling noise in the sliding mode. It is loudest in 3 gears, in 5 gears it has not yet occurred to me. If you drive for example into a village and then slid down at 50-60 kmh from 4 into 3 gears and give no gas, then this noise occurs. The following parts have been nicely renewed: clutch, Backlog, exhaust rod has been completely repaired.