1, 3 scale rc car part 13. I broke the gearbox already

Gearbox was finished, the air shift system is working, but a few minutes before taking this video I engaged gear at far too high an idle speed, and I think something has already broken in the gearbox. The new exhaust sounds so good, despite the gearbox clonking, so I thought I d upload the video anyway. EDIT, Gearbox problem shown on my Instagram, keith57000.