Chevrolet 1977 Monte Carlo, Руководство по ремонту

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M A N U A L T R A N S M IS S IO N 7B -35
4-SPEED 1 1 7 M M T R A N S M IS S IO N
IN D E X
Disassembly of Transmission..................................... ..7B-35
Subassembly Operations................................................7B-35
Transmission Cover.....................................................7B-35
Disassembly.............................................................. ..7B-35
Assembly.................................................................. ..7B-35
Drive G ear................................................................. ..7B-38
Disassembly.............................................................. ..7B-38
Inspection............................................................... ....7B-38
Assembly.................................................................. ..7B-39
D IS A S S E M B L Y OF T R A N S M IS S IO N
Refer to Figures 7B-1L and 7B-2L
1. Mount transmission in suitable holding fixture and
remove cap screws attaching transmission cover assembly
to transmission case. I f required, insert two 5/16 x 18 screws
in cover flange threaded holes and turn evenly to raise cover
dowel pins from case.
Move reverse shifter fork so that reverse idler gear is
partially engaged before attempting to remove cover. Forks
must be positioned so rear edge of the slot in the reverse fork
is in line with the front edge of the slot in the forward forks
as viewed through tower opening.
2. Place transmission in two gears at once to lock gears.
Remove the universal joint flange nut, universal joint front
flange and brake drum assembly.
On models equipped with 4-wheel drive transmfer case,
use Tool J-23070 to remove mainshaft rear lock nut (Fig.
7B-26L).
3. Remove parking brake and brake flange plate
assembly on models equipped with propeller shaft parking
brake. Refer to Section 5, Truck Service Manual.
4. Remove rear bearing retainer and gasket.
5. Slide speedometer drive gear off mainsahft.
6
. Remove drive gear bearing retainers and gasket.
7. Remove countergear front bearing cap and gasket.
8
. Pry countergear front bearing out by inserting a two­
pronged puller J-28509 through the cast slots in case.
9. Remove countergear rear bearing retaining rings
(snap ring) from shaft and bearing. Using Tool J-22832 and
J-8433-1 remove countergear rear bearings (Fig. 7B-3L). ,
This will allow countergear assembly to rest on bottom of
case.
Make sure Tool J-22832 engages full circumference of
groove in bearing to prevent tool damage.
10. Remove drive gear bearing outer race to case
retaining ring.
11. Remove drive gear and bearing by tapping gently
on bottom side of drive gear shaft and prying directly
opposite against the case and bearing snap ring groove at
the same time. Remove 4th gear synchronizer ring.
Index cut out section of drive gear in down position
with countergear to obtain clearance for removing clutch
gear.
Drive Gear Bearing Retainer Oil Seal..................... 7B-39
Mainshaft.................................................................... 7B-40
Disassembly.............................................................. 7 B-40
Inspection................................................................. 7 B-40
Assembly.................................................................. 7B-41
Countershaft............................................................... 7B-42
Disassembly.............................................................. 7B-42
Assembly.................................................................. 7B-42
Assembly of Transmission.......................................... 7B-42
12. Remove reaer mainshaft bearing retainer ring (snap
ring) and using Tool J-22832 and J-8433-1, remove bearing
from case (Fig. 7B-4L). Slide 1st speed gear thrust washer
off mainshaft.
13. Raise rear of mainshaft assembly and push
rearward in case bore, then swing front end up and lift from
case. Remove synchronizer cone from shaft.
14. Slide reverse idler gear rearward and move
countergear rearward until front end is free of case, then lift
to remove from case.
15. To remove reverse idler gear, drive reverse idler
gear shaft out of case from front to rear using a drive.
Remove reverse idler gear from case.
S U B A S S E M B L Y O P E R A T IO N S
T R A N S M IS S IO N C O VER
Disassembly (Fig. 7B-5L)
1. Using a small punch drive out pins retaining lst-2nd
and 3rd-4th shifter forks to shifter shafts and also drive out
expansion plugs.
The pin retaining the third and fourth shifter fork to
the shaft must be removed, and the shifter fork removed
from the cover before the reverse shifter head pin can be
removed.
2. With shifter shafts in neutral position, drive shafts
out of cover and shafter forks.
N O TIC E : Exercise care so shaft detent balls, springs
and innerlock pin located in the cover are not lost as
the shifter shafts are removed.
3. Drive out pin holding reverse shifter head and drive
out the shaft.
N O TIC E : Exercise care during shaft removal since
detent balls are under spring tension in the rear rail
boss holes.
Assembly (Fig. 7B-6L)
1. In reassem b lin g th e tra n sm issio n co v er care m u s t be
used in in stallin g th e s h ifte r sh afts. T h e y sh o u ld be in sta lle d
in th e o rd e r sh o w n in Fig. 7B -7L, n a m e ly , reverse, 3 rd -4 th ,
an d ls t-2 n d . Fig. 7B -6L illu s tra te s th e d iffe re n c e in th e
sh afts.
O V E R H A U L M A N U A L