A dumping transport vehicle is provided for transporting picked or stripped cotton from a harvester back to the module. A large capacity dump box or basket features strategically located wire mesh panels to allow air to escape when the cotton is delivered into the dump basket so that the cotton will not boil out over the top of the dump basket and will properly settle therein. Additionally, the vehicle features improved geometry for the basket dumping cylinders in relation to the dumping pivot for the basket and the supporting wheeled frame so that the loaded device will be stable and will remain adequately stable when the cotton is dumped into the top of the module.