GMC 1989 Light Duty Truck, Руководство по ремонту, Страница: 936 / 998

7B4-12 BORG WARNER TRANSMISSIONS
*
2
.
4.
Figure 31—Shift Forks and Selector Plates
• For damage and bends.
• For worn or damaged plates.
• For smooth fit in the cover.
Shift cover.
• For cracks and warping.
• For smooth shift shaft fit.
• Shaft plug for damage or leaks.
A ssem ble (Figure 30)
Coat the shift shaft and the cover bores lightly with
grease.
Install a new shift shaft plug (673), if needed.
• Coat the outside of the plug with sealing
compound.
Fit the inserts (
686
) and the fork plates (
688
) into the
shift forks (figure 31).
1st and 2nd (largest) shift fork (672).
• Fit the shift shaft into the cover rear bore.
• Hold the shift fork in the cover with the fork
offset to the rear (figure 32).
• Push the shift shaft through the fork.
Selector arm (689) and the interlock plate (671).
Figure 32— Removing the Shift Shaft
Retaining Pin
• Hold the selector arm and the interlock plate in
the cover with the widest part of the plate
away from the cover.
• The shift arm retaining pin hole must be away
from the cover and to the rear (figure 32).
• Push the shift shaft through the arm.
5. 3rd and 4th shift fork (687).
• Hold the shift fork in the cover with fork offset
to the rear (figure 32).
• The fork plate must be under the
1
st and 2nd
shift fork plate.
• Push the shift shaft through the fork, into the
cover front bore.
6
. Turn the shift shaft until the front fork plate is away
from the cover and parallel to it.
7. Drive a new retaining pin (670) into the selector arm
and the shift shaft.
• Be sure the arm and shaft pin holes are
aligned.
• The retaining pin must be flush with the
selector arm.
8
. Install a new oil seal (602).
• Coat the seal with transmission oil.
TRANSMISSION ASSEMBLY
(INSTALLATION OF SUB-ASSEMBLIES)
Use new seals, gaskets, and thread sealer on all bolt
threads when assembling the transmission. Tighten all
bolts to specified torque.
Lubricate all assemblies as they are installed in the
transmission using transmission oil.
I-* * -! Install or C o nn ect (Figures 1,
2
and
3)
Tools Required:
J 29895 Countershaft Rear Bearing Installer
J 33032 Rear Cluster Bearing Assembly Tool
1
. Countergear front bearing (642) (figure 33).
• Coat the bearing bore with Loctite #601 or
equivalent.
• The bearing must be flush with the transmis­
sion case.
2
. Countergear thrust washer (641).
• Coat the thrust washer with grease.
3. Countergear (604) and the rear bearing spacer
(636).
• Tip the transmission case up.
• Fit the countergear into the front bearing.
• Install the rear bearing spacer.
4. Countergear rear bearing (635) (figures 34 and 35).
• Coat the bearing with grease.
• Install the bearing using J 33032 and J 29895.