Chevrolet 70 1969 Series, Руководство по ремонту

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TRANSMISSION AND CLUTCH 7-71
itution of a hard ham m er for soft ham m er, for example,
m ay seriously dam age the transm ission. Special tools,
mentioned in text and shown in illustrations, should be
employed. List of tools will be found in S P E C IA L
T O O L S at end of this m anual.
W hen assembling the transm ission, use new snap rings,
cotter pins, gaskets, and oil seals. Lubricate each moving
part with lubricant specified in L U B R IC A T IO N (SE C . 0)
of this m anual. C oat all bushings with a light coat of pe­
trolatum before installation.
T R A N S M IS S IO N C A S E
1. If previously removed, install expansion plug locating
ring in countershaft front bearing bore.
2. Install expansion plug, m aking sure plug is expanded
enough to prevent oil leakage.
M A IN D R IV E G E A R A SS E M B L Y
N O T E : K e y n u m b e rs in text refer to Figure 21.
1. Using an arbor press and suitable installer sleeve, in­
stall m ain drive gear bearing (50) on m ain drive gear
(51) with snap ring on bearing tow ard front end of
drive gear (51).
2. Install drive gear bearing retaining nut (49). Tighten
nut securely. Refer to Figure 19.
3. Stake nut to lock in place.
C O U N T E R SH A F T A S S E M B L Y
N O T E : K e y n u m b e rs in text refer to Figure 21.
1. Using a plastic ham m er, tap a W oodruff key (37) into
countershaft 3rd speed gear (36) and 4th speed gear
(37) slots in countershaft (38).
2. Press 3rd speed gear (36) on the countershaft (38)
with long hub tow ard the rear.
3. Press 4th speed gear (35) on the countershaft (58)
with long hub tow ard the rear.
4. Install drive gear spacer (34) on countershaft (38).
5. T ap the rem aining drive gear key (37) in slot in coun­
tershaft; then press countershaft drive gear (33) on
countershaft (38) with long hub tow ard the rear.
6. Install countershaft drive gear retaining ring (32) in
groove of countershaft (38).
M A IN S H A F T A S S E M B L Y
N O T E : K e y n u m b e rs in text refer to Figure 21.
1. C lam p m ainshaft (52) in a vise with soft jaw s with
front end up.
2. Install m ainshaft 2nd speed gear bushing sleeve (55)
and lock pin (72) on m ainshaft. Pin m ust be installed
tow ard pilot end of m ainshaft (52) with oil hole in
sleeve lined up with oil hole in shaft (fig. 23).
3. To insure a proper tight stack-up between the 2nd
speed gear bushing sleeve (55), second speed gear sel­
ective retaining washer (57), and snap ring (58), the
following procedure m ust be exercised.
a. Before 2nd speed gear (56) is installed on bushing
sleeve (55), place retaining washer (57) on shaft
and hold dow n securely against bushing sleeve (55).
b. While holding snap ring (58) paralled to the re­
taining washer (57), slip snap ring into ring groove
in m ainshaft (52). Select variable thickness re­
taining washers (57) until a washer is selected
that will allow snap ring (58) to fit securely in
the groove of m ainshaft (52) (fig. 23).
c. Rem ove selected washer (57) and install 2nd speed
gear and bushing assem bly (56) over bushing
sleeve (55).
d. Place selected w asher (57) in position; then install
snap ring (58) into groove of m ainshaft (52).
Be sure snap ring is well seated and securely locked in
groove.
N O T E : En d p la y on 2 n d sp e e d g e a r (5 6 ) m u st
be from 0 . 0 0 4 " to 0 . 0 1 0 " . 2 n d sp e e d g e a r re­
tain er w a s h e r s (5 7 ) a re a v a ila b le in sizes listed
in "S p e c ific a tio n s " a t e n d o f this section.
Figure 2 2 — Installing M a in sh a ft 2 n d S p e e d G e a r B u sh in g Sleeve
Figure 2 3 — Installing M a in sh a ft 2 n d S p e e d G e a r V a ria b le Thickness Re­
tainer W a sh e r
CHEVROLET SERIES 70-80 H E A V Y DUTY TRUCK S H O P M A N U A L