Gear change mechanism is a component that is too often taken granted but it is one of the more important feature of the vehicle. It must be quick and smooth in action, efficient and totally reliable. In cab over engine type truck configuration, the mechanical single rod is preferable & best efficient option for gear shift mechanism. An attempt is made to provide a highly efficient single rod gear shifting mechanisms with telescopic type arrangement, and also it is integrated with a unique cam & follower mechanism to ensure cabin tilting operation at its given axis. This system is independent of the engine placement on the chassis. Also it is vibration free, totally isolated from engine heat & noise as it doesn't required any bigger cabin cut out. Proof of concept is already being done on the validation truck.