Frame，Body and Chassis

   The body and frame are the two largest sections of a motor vehicle. The frame is thestrong metal structure that provides a mounting place for the other parts of the vehicle.The frame holds the engine, transmission, suspension, and other assemblies in position.

    An automobile body is a sheet metal shell with windows, doors, a hood，and a trunkdeck built into it. It provides a protective covering for the engine，passengers and cargo.The body is designed to keep passengers safe and comfortable. The body styling providesan attractive，colorful，modern appearance for the vehicle.

    The term chassis is often used when referring to a vehicle's frame and everythingmounted to it except the body-tires，wheels，engine，transmission, drive axle assembly,and frame.