Abstract: This paper is studied about the five speed manual gear transmission system for Ford Ranger automobile. Power transmission system for automobile is composing with transmission gear box, universal joint, propeller shaft, final drive and drive axle. The transmission consists of a train of gears with different sizes. The main aim of this study is about the investigation of how the five speed manual gear transmission influence on the vehicle’s performance. The purpose of this investigation is for the driver’s safety and comfort by ensuring good vehicle drive ability. This study is including the gear transmission, torque, wheel torque, tractive effort and vehicle speed.