An electric vehicle is a vehicle powered by an electric motor, instead of an internal combustionrnengine, and the motor run using the power stored in the batteries. Electric Vehicles are known asrnzero emissions vehicles and are much environment friendly than gasoline powered vehicles. rnEven though electric vehicle brings an eco-friendly, green solution to the automotive industryrnsector, there exist drawbacks when compared to conventional gasoline-powered cars. The mainrndrawback is that electric vehicles on average travel a shorter range than gasoline powered vehiclesrndue to the heavy weight, and this puts pressure on the battery pack which forced to drain out faster.rnTo optimize the energy consumption of electric vehicles the reduction of transmission housingrnweight is important. The main objective of this research work is to develop an optimized compositernversion of an existing aluminum transmission housing for single speed electric vehicle. rnThe selected composite material characterized using AUTODESK HELIUS COMPOSITE and thernfree-size optimizations executed using one of the finite element analysis software ANSYSrnOptiSlang. The optimized T1000-3501-6Epoxy with T800-3501-6Epoxy laminate checked for thernstatic and modal deformation. From the ANSYS Optislang optimization the weight of therntransmission housing reduced by 22%, where the weight of Aluminum 6061-T6 was 5.4kg and thernoptimized weight by using composite + Aluminum material was about 4.19kg which satisfies thernconstraint conditions.