Strange knocking noise told likely transmission. It's a auto cvt box. Slight oil leak on gearbox side of manifold. Had gearbox serviced when we bought it. 1 year ago. No evidence of this before we owned it. Garage cannot investigate as said needs audi specialist. I live in N.ireland. its miles away, told it will cease at anytime and I'm wondering if its worth the expense of a new gearbox? I can't seem to post the video on here. It's a knocking noise seems high up in the engine. Not so loud under 30 mph louder over 40. Nothing audible when stationary or revving. Any advice gratefully received. Only car so fast action required.