Chevrolet 70 1969 Series, Руководство по ремонту

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TRANSMISSION AND CLUTCH 7-28
case. Feed rear of countershaft through rear counter­
shaft bearing bore. Move countershaft forward and
into pilot bearing.
C A U T IO N : D O N O T D ISR U P T C O U N T E R S H A F T
N E E D L E B E A R IN G
3. Position rear bearing oil slinger and start rear bearing
(fig. 25N).
4. Drive rear bearing on countershaft and into rear bear­
ing bore (fig. 26N).
NOTE: Countershaft drive gear must be sup­
ported on each side with a 1 / 4 " flat bar to
prevent dam age to countershaft pilot bearing.
Install bearing retainer ring.
5. Use heavy grease on reverse idler thrust washers to
hold in place (fig. 27N).
6. Insert two reverse idler gear bearings in idler gear.
7. Install reverse idler gear (fig. 9N). Insert idler shaft
through case and idler gear.
NOTE: Idler shaft lock groove must line up with
lock bolt hole. Drive shaft into position. Install
shaft lock and bolt. Tighten bolt 20 to 25 ft.
lbs. torque.
8. Install mainshaft assembly into transmission case.
9. Assemble the pilot bearing in the main drive gear as
follows (fig. 28N):
a. If a new pilot bearing is used it comes from the
factory with a plastic sleeve. Stand drive gear
on end. Set bearing and sleeve over bearing poc­
ket in drive gear. Slide bearing rollers and cage
L e g e n d For F ig u re 3 2 N
1. Gear Shift Lever Dust Cover 22. 2nd Speed Overshift Spacer
2. Gear Shift Lever Pivot Pin
23. Reverse Shift Lug Lock
3. Control Top
Screw
4. Gear Shift Lever
24. Reverse Shift Lug
5. Gear Shift Lever Support Washer
25. 4th and 5th Shift Rod
6. Support Spring
26. Mesh Lock Ball
7. Control Top Gasket
27. Interlock Cross Pin
8. Shift Rod Cover
28. 2nd and 3rd Shift Rod
9. Shift Rod Cover Gasket
29. 1st and Reverse Shift Rod
10. Shift Rod Support Screw
30. Mesh Lock Ball
10. A Shift Rod Support Screw
31. Mesh Lock Spring
Lock Washer
32. Reverse Hatch Plunger
11. Shift Rod Support
33. Reverse Hatch Plunger
12. 1st and Reverse Shift Fork
Retainer Washer
Lockscrew
34. Reverse Hatch Plunger
13. 1st and Reverse Shift Fork
Spring
14. Shift Fork Lock Pin
35. 1st and Reverse Rocker
15. 4th and 5th Shift Fork
36. Reverse Latch Plunger Nut
Assembly-lnc. Items 16 and 17
37. Reverse Latch
16. Shift Fork Bushing
Plunger Nut Cotter
17. Shift Fork Bushing
38. Backup Switch Hole Plug
18. Shift Fork Bushing
39. Backup Switch Hole Plug
19. Shift Fork Bushing
Gasket
20, Shift Fork Lock Pin
40. Welch Plug
21 . 2nd and 3rd Fork
^1. Control Top Screw and
Assembly-lnc. Items 18 and 19 Lock Washer
from plastic sleeve into bearing pocket,
b. If old pilot bearing is used, set rollers in bearing
case and hold in place with a rubber band. Slide
bearing rollers and cage from rubber band into
bearing pocket.
10. Install main drive gear assembly in transmission case.
Clutching teeth on main drive gear must enter 5th
speed synchronizer cup without binding (fig. 29N).
11. Press oil seal into drive gear bearing cap with lip of
seal up. Shellac a new gasket to bearing cap, use cau­
tion as not to cover oil return groove in bearing cap.
12. With bearing cap oil return groove lined up with oil
hole in transmission case install bearing cap and
bolts. Tighten bolts 20 to 25 ft. lbs. torque.
13. Install mainshaft rear bearing (fig. 30N).
14. Shellac a new gasket to countershaft bearing cap.
Install bearing cap and bolts, tighten bolts 20 to 25 ft.
lbs. torque.
15. Install speedometer drive gear.
16. Press a new oil seal in mainshaft rear bearing cap
with lip of seal down. Shellac gasket to bearing cap,
use caution as not to cover oil return grooves in bear­
ing cap. Install bearing cap with oil grooves lined up
with oil holes in case. Tighten bolts 20 to 25 ft. Ibs.
torque.
17. Install parking brake and drum assembly as des­
cribed in Section 5, Truck Chassis Service Manual.
18. With transmission shifted into neutral, install shift
control assembly. 2nd and 3rd, 4th and 5th shift forks
set over shift hubs, 1st and reverse fork enters slot on
1st and reverse gear. Tighten bolts 20 to 25 ft. lbs.
torque. Position three mesh lock balls and springs in
support housing (fig. 3 IN).
19. Install shift support cover. Tighten shift support
cover bolts 20 to 25 ft. lbs. torque.
20. Install remote control or shift control top, tighten
bolts 20 to 25 ft. lbs. torque.
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK S H O P M A N U A L