This fully factory-built gearbox is ready to replace the V1 brushed Jumpshot gearbox! Built with the complete FLUX drivetrain, you can upgrade to a more powerful FLUX brushless system for increased speed, more power, and more fun! The metal spur, pinion, and differential gears feature the FLUX-specific tooth profile for improved gear engagement and reduced rolling resistance. The metal motor mount insert is also included, along with a fully enclosed pinion cover and a rubber cap for access to the slipper clutch. With this gearbox set, you get fantastic, super-durable parts in a fully assembled kit, ready for installation, all at a significant cost advantage compared to purchasing all the parts individually!.