Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 393 / 468

MANUAL TRANSMISSION
7B-13
A L IG N R O L L PIN
W IT H C O U N T E R B O R E
W H E N IN S T A L L IN G
R E V E R S E ID L E R
G E A R S H A F T
C O U N T E R B O R E
F IR S T -R E V E R S E
S L E E V E A N D G E A R
H U B
/ R E T A IN IN G
S N A P R IN G
F IR S T -R E V E R S E
S Y N C H R O N IZ E R
S P R IN G -
U N D E R L IP O F
K E Y S
Fig. 7B-1 2 B ~ R e m o v in g Reverse Id le r G ear S h a ft
23. Remove reverse idler gear and thrust washers by
tapping shaft with ham m er until end of idler gear shaft (end
with roll pin) clears counterbore in rear of case and remove
shaft (Fig. 7B-12B).
24. From the bottom of the case retrieve, clutch shaft
roller bearing or countergear needle bearing that may have
fallen into case during disassembly.
M A IN S H A FT DISASSEMBLY
1. Remove snap ring from front of output shaft and
remove Second-Third synchronizer assembly and second
gear. M ark hub and sleeve for correct assembly.
2. Remove snap ring and tabbed thrust washer from
shaft and remove first gear and blocking ring.
3. Remove First-Reverse hub retaining snap ring.
NOTE:
Observe position of spring and keys before
removal, also, m ark hub and sleeve for correct assembly.
4. Remove sleeve and gear, spring and three keys from
hub (Fig. 7B-13B).
5. Using an arbor press, remove hub from output shaft.
CLEANING AND INSPECTION
Transmission Case
1. W ash the transmission thoroughly inside and outside
with cleaning solvent, then inspect the case for cracks.
2. Check the front and rear faces for burrs, and if
present, dress them off with a fine mill file.
Front and Rear Bearings
1. W ash the front and rear ball bearings thoroughly in
a cleaning solvent.
2. Blow out bearings with compressed air.
CAUTION: Do not allow the bearings to spin, turn
them slowly by hand. Spinning bearings may
damage the race and balls.
Fig. 7 B -1 3 B -F irs t-R e v e rs e S y n c h ro n iz e r H ub
3. M ake sure bearings are clean, then lubricate with light
engine oil and check them for roughness by slowly turning
the race by hand.
Bearing Rollers
All clutch gear and countergear bearing rollers should
be inspected closely and replaced if they show wear. Inspect
countershaft and reverse idler shaft at the same time, replace
if necessary. Replace all worn washers.
Gears
1. Inspect all gears for excessive wear, chips, or cracks
and replace any that are worn or damaged.
2. Check both clutch sleeves to see that they slide freely
on their hubs.
REPAIRS
Synchronizer Keys and Spring
Replacement
1. M ark hub and sleeve so they can be m atched upon
reassembly.
2. Push the hub from the sliding sleeve, the keys and the
springs may be easily removed.
3. Install one spring into second-third hub. Be sure
spring covers all three key slots in hub. Align second-third
sleeve to hub using m arks made during disassembly, and start
sleeve onto hub.
4. Place the three keys into hub slots and on top of
spring, then push sleeve fully onto hub to engage keys in
sleeve (Fig. 7B-14B).
5. Install rem aining spring in exact same position as first
spring. Ends of both spring m ust cover same slots in hub and
not be staggered.
NOTE:
Keys have small lip on each end. W hen
correctly installed, this lip will fit over spring (Fig. 7B-
14B).