Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 417 / 468

MANUAL TRANSMISSION 7B-37
Fig. 7B-1 7K --R em oving Reverse Id le r S h a ft Roll Pin
Drive Gear Bearing Retainer Oil
Seal Replacement
1. Pry out old seal.
2. Using a new seal, install new seal into retainer using
Tool J-2 1359 until it bottom s in bore (Fig. 7B-16K).
Lubricate I.D. of seal with transm ission lubricant.
Reverse Shifter Shaft and/or
Seal Replacement
1. W ith case extension removed from transmission the
reverse shifter shaft lock pin will already be removed, (see
Step 5 under Transmission Disassembly).
2. Remove shift fork.
3. Carefully drive shifter shaft into case extension,
allowing ball detent to drop into case. Remove shaft and ball
detent spring. Remove "O" ring seal from shaft.
4. Place ball detent spring into detent spring hole and
start reverse shifter shaft into hole in boss.
5. Place detent ball on spring and while holding ball
down, push the shifter shaft into place and turn until the ball
drops into place in detent on the shaft detent plate.
6. Install "O" ring seal on shaft.
7. Install shift fork.
NOTE:
Do not drive the shifter shaft lock pin into place
until the extension has been installed on the transmission
case.
Reverse Idler Shaft
Replacement
1. Place a small punch into hole in extension’s reverse
idler shaft boss and drive the welch plug and pin into the shaft
(Fig. 7B-17K) until the shaft can be pulled from rear
extension.
2. Insert new idler shaft into extension until hole in shaft
lines up with hole in boss.
3. Insert roller pin in transm ission boss opening and
Fig. 7 B -1
8
K—S h ift C o ve r A s s e m b ly
drive the pin into the extension until the shaft is securely
locked in place. Install new welch plug, with sealer, in boss
opening.
Transmission 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 transm ission, disconnect the ls t/2 n d cross shaft
and 3 rd /4 th 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.
ASSEMBLY OF COUNTERGEAR
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 dum m y shaft or loading Tool J-24658 into
countergear.
CHECKING COUNTERGEAR END PLAY
1. Rest the transm ission case on its side with the side
cover opening tow ard the assembler. P ut 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 th at tanged thrust washers are not knocked
out of place.
3. Position the transmission case resting on its front face.
4. Lubricate and insert countergear (pushing loading
Tool J-24658 out front of case) until w oodruff key slot is in
its relative installed position (do not install key).
5. A ttach a dial indicator as shown in Fig. 7B-20K and
check end play of the countergear. If end play is greater than
.025", a new th ru st washers m ust be installed.