Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 443 / 468

MANUAL TRANSMISSION 7B-63
CASE, CO V ER A N D H O U S IN G S -T ransfer case,
cover, and housings m ust be thoroughly cleaned in solution
to remove all accum ulation of lubricant and dirt. Remove all
trace of gaskets from surfaces where used.
IN S P E C T IO N -C arefully inspect all bearings and
rollers fro evidence of chipping, cracks, or worn spots that
would render bearing unfit for further service. Bearings are
non-adjustable and if worn or damaged, must be replaced
with new parts. Inspect shaft splines drive chain and gears.
If any indication of failure, such as chipped teeth or excessive
wear, is indicated, those parts should be replaced with new
parts.
SUBASSEMBLY REPAIRS
NOTE:
Refer to figure 7B-12S for exploded view of
subassemblies.
Differential Carrier Assembly (Fig. 7B-12S)
Disassembly
1. Remove bolts from carrier assembly and separte
carrier sections.
2. Lift the pinion gear and spider assembly from carrier.
NOTE:
Observe that undercut side of pinion gear spider
faces tow ard front side gear.
3. Remove the pinion th ru st washers, pinion roller
washers pinion gears and roller bearings from the spider unit.
4. Clean and inspect all components. Replace all worn
or broken parts.
Assembly
1. Using a petroleum jelly, load roller bearings in pinion
gears (132 required, 33 each pinion).
2. Install pinion roller washer, pinion gear, roller washer
and thrust washer on each leg of spider.
3. Place the spider assembly in the carrier (front half)
with undercut surface of spider thrust surface facing
downward or toward gear teeth.
4. Align marks on carrier sections and position carrier
halves together. Install retaining bolts and tighten to
specifications.
Lockout Clutch Assembly (Fig. 7B-11S)
Disassembly
1. Remove front side gear from input shaft assembly and
remove thrust washer, roller bearings (123) and spacers from
front side gear bore. Note position of spacers to facilitate
reassembly.
2. Using snap ring pliers, remove the snap ring retaining
drive sprocket to clutch assembly. Slide the drive sprocket
from the front side gear.
3. Using snap ring pliers, remove lower snap ring.
4. Remove sliding gear, spring and spring cup washer
from front side gear.
5. Clean and inspect all components. Replace all worn
or defective parts.
Assembly
1. Install spring cup washer, spring and sliding clutch
gear on front side gear.
2. Install snap ring retaining sliding clutch to front side
gear.
3. Using a petroleum jelly, load roller bearings (123) and
spacers in the front side gear.
4. Install thrust washer in gear end of front side gear.
5. Slide drive sprocket on to clutch splines and install
retaining ring.
Input Shaft Assembly (Fig. 7B-11S)
Disassembly
1. Slide thrust washer and spacer from shaft.
2. Using snap ring pliers, remove snap ring retaining
input bearing retainer assembly to shaft (Fig. 7B-13S) and
remove bearing retainer assembly from shaft.
3. Support low speed gear (large gear) and tap shaft from
gear and thrust washer.
NOTE:
Observe thrust washer pin(s) located in shaft
(Fig. 7B-11S).
4. Using a screw driver, pry behind open end of large
snap ring retaining input bearing in bearing retainer (Fig.
7B-14S) and remove ring from retainer. Tap bearing from
retainer.
5. Remove pilot roller bearings (15) from end of input
shaft.
6. Remove "O" ring from end of shaft and discard.
7. Clean and inspect all components. Replace as
required.
Assembly
1. Position bearing to retainer and tap or press into place.
Ball loading slots should be tow ard concave side of retainer.
2. Install large snap ring securing bearing in retainer.
NOTE:
Snap ring is a select fit. Use size A, B, C or D
as required to provide tightest fit.
3. Install low speed gear on shaft with clutch end toward
gear end of shaft.
4. Position thrust washers on shaft, aligning slot in
washer with pin in shaft. Slide or tap wahser into place.
5. Position input bearing retainer on shaft and install
snap ring, holding bearing in place on shaft.
NOTE:
Snap ring is a select fit. Use size A, B, C or D
as required to provide tightest fit.
6. Slide spacer and thrust washer onto shaft. Align
spacer with locator pin.
7. Using a heavy grease, install roller bearings (15) in
end of shaft.
8. Install new rubber "O" ring on end of shaft.
Range Selector Housing (Range Box)
Disassembly (Fig. 7B-11S)
Removing S h ifte r Assembly
1. Remove poppet plate spring, plug and gasket. Discard
gasket.
2. Disengage sliding clutch gear from input gear and
remove clutch fork and sliding gear from case.
3. Remove shift lever assembly retaining nut and upper
shift lever from shifter shaft.
4. Remove shift lever snap ring and lower lever.
5. Push shifter shaft assembly downward and remove
lockout clutch connector link.
NOTE:
Long end of connector link engages poppet
plate.
6. Remove shifter shaft assembly from case and separate
the inner and outer shifter shafts. Remove and discard "O"
rings.
7. Inspect poppet plate for damage. If necessary to
remove, drive pivot shaft from case. Remove poppet plate and
spring from bottom of case.