INA Bearings India Pvt. Ltd. Manufactures Automatic Shift Gearbox with Three Electrical Motors. INA Bearings India Pvt. Ltd. Is an ISO / TS 16949:2002 and ISO 9001:2008 certified company. Automatic Shift Gearbox with Three Electrical Motors has three electrical motors to carry out the movements effected by the driver via the clutch pedal and selector lever directly at the gearbox. The gearbox itself remains unchanged; the design is compact. For convenience, a gearbox with Automatic Shift Gearbox components may be optionally shifted manually or automatically.