Suspension, Steering, and Brake Systems
The suspension, steering, and brake systems are the
movable parts of the chassis. They bolt or anchor to the
frame and provide important functions that will be
explained in the following sections.
Suspension System
The suspension system allows the vehicle’s wheels
and tires to move up and down with little effect on body
movement. This makes the vehicle’s ride smooth and
safe. The suspension system also prevents excessive body
lean when turning corners quickly.
As you can see in Figure 1-24, various springs, bars,
swivel joints, and arms make up the suspension system.
Steering System
The steering system allows the driver to control
vehicle direction by turning the wheels right or left. It
uses a series of gears, swivel joints, and rods to do this.
Study the names of the parts in Figure 1-24.
Chapter 1 The Automobile 17
Figure 1-23. A transaxle contains a transmission and a differ-
ential in one housing. (Ford)
Differential
assembly
Power
output to
drive axle
Shift rod
assembly
Housing or
case
Transmission
assembly
Figure 1-24. The suspension and steering systems mount on the frame. Study the part names. (Saab-Scania)
Tire
Engine
Shock
absorber
Power
steering
pump
Steering system
tie rod
Suspension
system control arm
Transaxle
Steering
gear
Front drive
axle
Wheel
Suspension
system
spring