Chevrolet 1977 light duty truck, Service Manual

Page: 243 / 861

6. Remove the floor p a n trim cover screws and
remove the cover.
7. Remove the screws securing the two halves o f
the floor pan cover; then remove the screws securing the
halves and seal to the floor p a n and remove the covers
(fig. 3B-64 and 3B-65).
8. R em ove the transmission indicator cable, if so
e q u p p e d (fig. 3B-63).
9. Move the front seat as fa r back as possible to
provide m a x im u m clearance.
10. Rem ove the two column bracket-to-instrum ent
panel nuts and carefull remove from vehicle. Additional
help should be obtained to guide the lower shift levers
th rough the firewall opening.
C and K Series Except T ilt Columns-
(Fig. 3 B -6 6 )
Disassembly
N O T E : G and P Series columns differ from those
shown in Figures 3B-66 thru 3B-74.
1. Remove the four dash panel bracket-to-column
screws and lay the bracket in a safe place to prevent
d a m a g e to the m ou n tin g capsules.
2. Place the column in a vise using both weld nuts
o f e ith e r Set A o r B as shown in Figure 3B-67. The vise
jaw s must clam p onto the sides o f the weld nuts
indicated by arrows shown on Set B.
CAUTION: Do not place the column in a vise
by clam ping onto one weld nut o f both sets A
a n d B or by clam ping onto the sides not
indicated by arrows, since dam age to the
colum n could result.
3. Remove the Directional Signal Switch. Lock
Cylinder, and Ignition Switch as outlined previously in
this section.
4. Column Shift Models - Drive out the upper shift
lever pivot pin and remove the shift lever.
5. Remove the upper bearing thrust washer.
Remove the four screws attaching the turn signal and
ignition lock housing to the jacket and remove the
housing assembly (fig. 3B-68).
6. Remove the thrust cap from the lower side o f
the housing.
7. Lift the ignition switch actuating rod and rack
assembly, the rack preload spring and the shaft lock bolt
and spring assembly out o f the housing (fig. 3B-69).
8. Remove the shift lever detent plate (shift gate).
9. Remove the ignition switch actuator sector
thro u g h the lock cylinder hole by pushing firmly on the
block tooth o f the sector with a blunt punch or
screwdriver (fig. 3B-70).
10. Rem ove the gearsh ift lever housing and shroud
fro m the jack et assembly (transm ission control lock tube
housing and shroud on floor shift models).
11. Remove the shift lever spring from the
g earsh ift lever housing (lock tube spring on floor shift
models).
12. Pull the steering shaft from lower end o f the
jack et assembly.
13. Remove the two screws holding the back-up
switch or neutral-safety switch to the column and remove
the switch.
14. Remove the lower bearing retain er clip (fig.
3B-71).
15. Automatic and Floorshift Columns - Remove
the lower bearing retainer, bearing a d a p te r assembly,
shift tube thrust spring and washer. The lower bearing
m ay be removed from the a d ap ter by light pressure on
the bearing outer race. Slide out the shift tube assembly.
Manual Transmission - Column Shift - Remove the
lower bearing adapter, bearing and the first reverse
shift lever. The lower bearing m ay be removed from
the a d a p te r by light pressure on the bearing outer
race. Remove the three screws from bearing at the
lower end and slide out the shift tube assembly.
Remove the gearshift housing lower bearing from
the upper end o f the mast jacket.
Assembly-All Except Tilt Columns
NOTE: Apply a thin coat o f lithium soap grease to
all friction surfaces.
1. Install the sector into the turn signal and lock
cylinder housing. Install the sector in the lock cylinder
hole over the sector shaft with the tang end to the
outside o f the hole. Press the sector over the shaft with a
blunt tool.
2. Install the shift lever detent plate onto the
housing.
3. Insert the rack preload spring into the housing
from the bottom side. The long section should be toward
the handwheel and hook onto the edge o f the housing
(fig. 3B-72).
4. Assemble the locking bolt onto the crossover
arm on the rack and insert the rack and lock bolt
assembly into the housing from the bottom with the
teeth up (toward hand-wheel) and toward the centerline
o f the column (fig. 3B-69). Align the 1st tooth on the
sector with the 1st tooth on the rack; if aligned properly,
the block teeth will line up when the rack assembly is
pushed all the w ay in.
5. Install the thrust cup on the bottom hub o f the
housing.
6. Install the gearshift housing lower bearing.
Insert the bearing from the very end o f the jacket.
Aligning the indentations in the bearing with the
projections on the jacket (fig. 3B-73).
CAUTION: I f the bearing is not installed
correctly, it will not rest on all o f the stops
provided.
7. Install the shift lever spring into the gearshift
lever (or lock tube) housing. Install the housing and
shroud assemblies onto the upper end o f the mast jacket.
Rotate the housing to be sure it is seated in the bearing.
8. With the shift lever housing in place, install the
tu rn signal and lock cylinder housing onto the jacket.
The gearshift housing should be in " P a r k ” position and
the rack pulled downward. Be sure the turn signal
housing is seated on the jacket and drive the four screws.