Chapter 1 The Automobile 3
Figure 1-3. Compare body-over-frame and unibody construction. A—In body-over-frame construction, the chassis parts bolt to a
strong perimeter frame. The body bolts to this thick steel frame. B—Unibody vehicles do not have a separate perimeter frame.
Chassis components bolt directly to the unibody assembly. (DaimlerChrysler, Saab)
Sheet metal
panels
Door
beams
A-pillar
B-pillar
C-pillar
B
Frame
Engine
Transmission
Drive shaft
Muffler
Gas tank
Tire
Wheel
A