The main aim of the project is to focus on the modeling and 3D printing of synchromesh gear box and the weight reduction of it using different 3D printing techniques like SSLS, SLA, DLP, FDM. Differential permit each of the driving wheels to rotate at different speeds, while for most vehicles supplying equal torque to each of them. A vehicle's wheels rotate at divergent speeds, mainly when turning corners. The differential is designed to operate a pair of wheels with same torque while permit them to rotate at different speeds. Additive manufacturing education is becoming to widespread adoption. Additive manufacturing is also the manufacturing technology. It is used by multiple industry subsectors, including motor vehicles, aerospace, machinery, electronics, and medical products. It can facilitate the customized production of strong light-weight 3D modeling. This paper describes 3D modeling of five speed transmission is designed and constructed by using AutoCAD software, 3D Mesh software, MakerBot 3D printer and digitizer. This 3D modeling of five speed transmission is good quality through lighter part, can demonstrate easily. The teacher can take 3D modeling of transmission and teach the operations of transmission in the classroom. It can produce the gears, fork, cover and synchronizer sleeves with different color. Many beautiful colors are interested to the students. So, it can use as teaching aids for the engineering students. In this transmission, five forward speed gears are helical type whereas reverse gears are spur type. Design consideration of spur gear and helical gears and shafts are included in this paper. In gear design, the number of teeth, face width, gear tooth features and pitch diameter are calculated. The shafts are designed according to the point of view of the strength.