Chevrolet 1977 10 Series, Repair Manual, Page: 373 / 468

AUTOMATIC TRANSMISSIONS
(400)7A-53
Fig. 7 A-1 7 7 C --F ro n t S ervo G r o u p -ln V e h ic le In s ta lla tio n
NOTE:
The teflon ring allows the front servo piston to
slide very freely in the case. The free fit of the ring in
the bore is a normal characteristic and does not indicate
leakage during operation. The teflon ring should only be
replaced if it shows damage or if evidence of leakage
during operation exists.
If transmission is in the vehicle, assemble front
servo group as shown in figure 50T and install this group
of parts into front servo bore in case and hold. Slip a
length of straight, clean feeler gauge or shim stock
(about .020") between spacer plate and front servo
piston to tem porarily retain front servo group. Figure
7A-177C.
10. Install "O" ring seal on electrical connector.
11. Lubricate and install electrical connector with lock
tabs facing into case, positioning locator tab in notch on side
of case (Fig. 7A-178C).
12. Install detent wire to electrical connector (Fig. 7A-
12C).
Fig. 7 A-1 7 9 C --C h e c k in g Rear B and Pin
Installation of Rear Servo Assembly
1. Check rear servo band apply pin. (Fig. 7A-179C).
a. A ttach band apply pin selection Gauge J-2 1370-6 and
J-2 1370-5 to transm ission case (lever pivot pin to rear) with
attaching screws.
A ttach tool attaching screws finger tight and check
freeness of selective pin. Torque attaching screws to 15 ft. lbs.
and recheck pin to make certain it does not bind.
b. Apply 25 ft. lb. torque and select proper servo pin to
be used from scale on tool.
Selecting proper length pin is equivalent to adjusting
band. The band lug end of each selective apply pin bears
identification in the form of one, two, or three rings.
There are three selective pins identified as follows:
1. If both steps are below the gauge surface, the long pin,
identified by 3 rings, should be used.
2. If the gauge surface is between the steps, the medium
pin, identified by 2 rings, should be used.
Fig. 7 A-1 78C—Installing Electrical Connector and "O" Ring
Seal Fig. 7 A-1 80 C -ln s ta ll in g Rear Acc um ulator Spring
TORQUE
WRENCH