one of the very important component of mechanical system involving motion transmission is gear assembly is Worm and pinion gear pairing is necessary to convert rotary motion into linear motion. The life of gear is important factor and the stresses developed on the tooth of the gear are one of the tedious task. Here, in the current work the stresses are analyzed using 3D photoelastic technique which is one of the promising techniques in stress analysis. The synthetic rubber material and the experimental stress analysis are conducted using polariscope in the laboratory. The result obtained shown promising approach to analyses the stresses in the 3D structure.