The Taigen steel gearboxes feature bushings on the reduction gears and bearings for the final drive shafts and are plug and play for compatible tanks. This gearbox set comes in the lower 4:1 gear ratio, has a 48mm shaft (short shaft), and the motors are in a High/Low mounting position. This gearbox does contain bearings in the final drive axle. The set comes with pre-wired motors with plugs and are easy installs. This gear box is intended for Taigen Tiger 1 (Metal) & Panther A.