Chevrolet 1977 light duty truck Service Manual page 283

Probable Cause
LEAF TYPE REAR SPRING
a. Rear leaf spring broken
b. Bent rear axle housing
c. Frame or underbody out of alignment
COIL TYPE REAR SPRING
a.
Damaged rear suspension arm and/or worn bushings
b.
Frame out of alignment
c. Bent rear axle housing
a. Steering column alignment
b. Steering linkage needs lubrication
c. Idler arm bushing worn
d. Steering gear adjustment
e. Power steering gear valve spool binding
f. Obstruction within power steering gear
g- Improper caster setting (negative)
a. Low or uneven tire pressure
b. Front wheel bearing incorrectly adjusted
c. Brakes incorrectly or unevenly adjusted
d. Front spring sagged
e. Steering gear off high point
f. Incorrect or uneven caster
g- Leaking wheel cylinders
"D O G ' T R A C K IN G
R E T U R N A B IL IT Y POOR
E R R A T IC STE ER IN G ON BR AK E A P P LIC A TIO N
Probable Remedy
a. Replace spring
b. Replace housing
c. Align frame
Replace suspension arm and/or bushings
a.
b. Align frame
c. Replace housing
a. See Section 3bin shop manual for proper alignment
b. Lubricate chassis
c. Replace idler arm
d. Adjust gear as outlined in Section3bof shop manual
e. See Section3bin shop manual
f.
See Section3bin shop manual
g- Check and reset if necessary
a. Inflate tires to proper recommended pressure
b. Adjust bearing as necessary
c. Adjust brakes as necessary
d. Check shop manual for proper riding heights and
replace spring if necessary
e. Check and correct steering if necessary
f.
Check and adjust caster as necessary
g- Replace (See sec. 5)