Pontiac Fiero 1988 Service Manual page 153

3-12 STEERING, SUSPENSION, TIRES AND WHEELS DIAGNOSIS
SUSPENSION MOVEMENT
(Loaded Runout)
S M O O T H R O A D
TIRE OUT
OF
ROUND
C A U S E D B Y
TIRE
S T I F F N E S S
VARIATION
RIM B E N T
O R
O U T O F R O U N D
G33830-3-AN
Fig. 16 Causes of Vibrations
S E A L E D W H E E L BEARING DIAGNOSIS
See Fig. 19 for Sealed Wheel Bearing Diagnosis.
T A P E R E D ROLLER BEARING
DIAGNOSIS
See Figs. 20 and 21 for Tapered Roller Bearing
Diagnosis.
TRIM HEIGHT DIAGNOSIS
See Fig. 22 for Trim Height Diagnosis.