Chevrolet 70 1969 Series, Shop Manual

Page: 753 / 913

TRANSMISSION AND CLUTCH 7-7
F ig u re 8 — B e a r in g T y p e R e v e rse Idler G e a r a n d S h a f t
1 Reverse Idler Shaft
7. Reverse Idler Shaft
Retainer
8. Reverse Idler Gear
2 "O" Ring Seal
9. Front Thrust Washer
3 Rear Thrust Bearing
10. Front Bearing Assembly
Washer
11. Boss (Integral With
4 Rear Thrust Bearing
Case)
5. Retainer Bearing
12. Retainer lock Plate
Assembly
13. Lock Washer
6 Transmission Case
14. Lock Plate Bolt
case. Remove retainer assembly and gasket. Discard
gasket.
2. Support transmission case on bed of arbor press (fig.
6); then apply pressure against front end of counter­
shaft to force countershaft out of front bearing.
NOTE: If interference is noticed between gear
teeth and reverse idler shaft boss, file off boss
to allow gear teeth to pass boss without inter­
ference.
3. Remove transmission case from press; then lift coun­
tershaft assembly out of case and remove bearing spa­
cer. Drive front bearing assembly forward and remove
from transmission case.
REVERSE IDLER GEAR REMOVAL
NOTE: Transmission Model 540GL is equipped
with a bushing type reverse idler gear, while
Model 541GL transmission has a bearing type
reverse idler gear. Accomplish the following
procedures:
Model 540GL Transmission, Bushing Type
(Key Numbers In Text Refer to Figure 7)
1. Remove bolt, lock washer, and lock plate (6) which
retain idler gear shaft (4) at rear of transmission case.
2. If reverse idler gear shaft (4) cannot be started out of
case with a long handled pry bar, attach removing
tool (J-6648) in notch on shaft as illustrated in Figure
7.
3. Tighten puller screws alternately and evenly until
shaft is free from boss (I). Remove idler gear (2)
from inside case.
NOTE: Bushings and idler gear can be replaced
only as an assembly.
Model 541GL Transmission, Bearing Type
(Key Num bers In Text Refer to Figure 8)
1. Remove bolt (14), lock washer (13), and lock plate
(12) retaining reverse idler shaft retainer (1) at rear of
transmission case.
2. Tap front end of reverse idler gear shaft (7) with a
brass drift and soft ham m er until reverse idler shaft
retainer (1) can be removed from transmission case.
3. Remove rear thrust bearing (4) from rear end of idler
shaft (7).
4. Remove thrust washer (3) and O-ring seal (2) from
reverse idler shaft retainer (1).
5. Remove reverse idler shaft (7), front thrust washer
(9), and reverse idler shaft front bearing (10).
DISASSEMBLY OF SUBASSEMBLIES
(Key Numbers In Text Refer to Figure 3
Unless Otherwise Specified)
F ig u re 9 — R e m o v in g S h ift Fork Lock Pin
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P M A N U A L