Loud clacking gear or axle shaft?

Loud clacking gear or axle shaft ? Hi I urgently need your help !!!!! I believe my gear or the axle shafts are gone. I drove today at once I hear such a clacking, pully loud. sounds like metal on metal. The clacking is only loud when I give gas, when I roll saying clutch kicks (with walk in) it is not to be heard. If you walk in from the gas and roll it is also not really to be heard (with all the side noises, can of course be the e It depends on the speed and can be heard in every gear. So regardless of the speed, that’s why I don’t really hope it’s the interlocking of the drive. I just picked it up in the front and inserted a gear. Because you can always turn the wheel easily and then it always cracks a bit, but that’s always the way it is. Then I took the gear out and let the wheel turn, because the noise was clearly heard again. as if you had a bit of stone in the mature. always to a certain spot it clacks ! Please help me !!!! What can that be ? MfG