Chevrolet 1980 Light Duty Truck Repair Manual page 378

7B-32 M A N U A L TR A N SM IS S IO N
F ig . 7 B -1 7 K - R e m o v i n g R e v e r s e Id le r S h a f t R o ll P in
Transm ission Side Cover
Although service of the side cover is covered here, the
transmission does not have to be removed to perform these
operations. To remove the side cover on-the-vehicle, simply
drain the transmission, disconnect the ls t/
and 3rd/4th linkage and remove the attaching bolts.
1. Remove the outer shifter lever nuts and lockwasher
and pull levers from shafts.
2. Carefully push the shifter shafts into cover, allowing
the detent balls to fall free, then remove both shifter shafts.
3. Remove interlock sleeve, interlock pin and poppet
spring.
4. Replace necessary parts (Fig. 7B-18K) and assembly
by reversing Steps 1-3.
A S S E M B L Y OF C O U N T E R G E A R
1. Install roller spacer in countergear (if removed).
2. Using heavy grease to retain rollers, install spacer,
rollers, spacer, rollers, and spacer in either end of
countergear. Repeat in other end of countergear (Fig. 7B-
19K).
3. Insert a dummy shaft or loading Tool J-24658 into
countergear.
C H E C K IN G C O U N T E R G E A R END PLAY
1. Rest the transmission case on its side with the side
cover opening toward the assembler. Put countergear
tanged thrust washers in place, retaining them with heavy
grease, making sure the tangs are resting in the notches of
the case.
2. Set countergear in place in bottom of transmission
case, making sure that tanged thrust washers are not
knocked out of place.
3. Position the transmission case resting on its front
face.
O V E R H A U L M A N U A L
O-RING
1-2 SH IFTER SHAFT
4. Lubricate and insert countergear (pushing loading
Tool J-24658 out front of case) until woodruff key slot is
in its relative installed position (do not install key).
5. Attach a dial indicator as shown in Fig. 7B-20K and
check end play of the countergear. I f end play is greater than
.025", a new thrust washers must be installed.
2
nd cross shaft
A S S E M B L Y OF M A IN S H A F T
1. From rear of mainshaft, assemble the 2nd speed gear
(with hub of gear toward rear of shaft).
2. Install lst-2nd synchronizer clutch assembly (sliding
clutch sleeve taper toward rear, hub to front) on the
mainshaft together with a synchronizer ring on both sides
of the clutch assemblies.
3. Position the 1st gear sleeve on the shaft and press
the sleeve onto the mainshaft until the
assembly and sleeve bottom against the shoulder of the
mainshaft (Fig. 7B-21K).
SLEEVE
f lW W I
SPRING
O S3 o
! ^ K
B A L L PIN B A L L
F ig . 7 B - 1 8 K - S h i f t C o v e r A s s e m b ly
ROLLERS
SPACER
SPACERS
Fig. 7 B -1 9 K -C o u n te rg e a r Cross S ection
O-RING
'
3.4 SH|F T E R SHAFT
2
nd gear, clutch