Chevrolet 1977 10 Series, Repair Manual, Page: 237 / 468

AUTOMATIC TRANSMISSION
(200J7A-1
SECTION 7 A
AUTOMATIC TRANSMISSION
THM 200 TRANSMISSION
INDEX
D isassem bly....................................................................... 7 A-1
Removal of C o n v e rte r................................................. 7A-1
Teflon S e a l s ................................................................... 7A-1
External Parts ............................................................... 7A-2
Front Unit Parts ........................................................... 7A-5
Front Gear P a r t s ........................................................... 7A-6
Rear Gear P a r ts ............................................................. 7A-8
Manual Shaft and Parking P a w l................................. 7A-9
Inspection and R eassem bly............................................. 7A-9
C a s e .................................................................................7A-9
Manual Shaft and Parking P a w l............................... 7A-10
DISASSEMBLY
Removal of Converter
1. W ith transmission in cradle of portable jack, remove
J-2 1366 and then converter assembly by pulling straight out.
2. Install Holding Fixture, J-8763-02 on transmission
and place into Holding Fixture, J-3289-20, with manual
shaft facing bench and oil pan side up (Fig. 7A-1A).
CAUTION: Do not over-torque fixture holding
screw.
NOTE:
Cleanliness is an im portant factor in the
overhaul of the transmission. Before attem pting any
disassembly operation, the exterior of the transmission
should be throughly cleaned to prevent the possibility
of dirt entering the transm ission internal mechanism.
D uring inspection and reassembly, all parts should be
thoroughly cleaned with cleaning fluid and then air
dried. Wiping cloths or rags should not be used to dry
parts.
CAUTION:
Do not use solvents on neoprene seals
,
composition-faced clutch plates or thrust washers.
Rear Gear P a r ts ........................................................... 7A-13
Low and Reverse C lu tch ............................................7A-17
Front Gear P a r t s ......................................................... 7A-20
Front Unit Parts ......................................................... 7A-23
Forward and Direct C lu tc h ........................................7A-29
Pump A ssem bly........................................................... 7A-30
External Parts ............................................................. .7A-34
Control Valve A sse m b ly ........................................... 7A-37
Bushing R eplacem ent..................................................... 7A-42
Specifications................................................................... 7A-47
Special Tools ................................................................... 7A-47
Teflon Seals
If any teflon seal rings are damaged (distorted, cut,
scored, etc.), or do not rotate freely in their groove, and
replacement is necessary, do the following:
1. Remove and discard old angle cut seal rings; full
circle rings m ust be cut off.
2. Inspect seal ring groove for burrs or damage.
3. W hen installing angle cut seal rings, do not over­
stretch. M ake sure cut ends are in same relation as cut (Fig.
7A-2A). Also, make sure rings are seated in the grooves to
prevent damage to the rings during reassembly of mating
part over rings. Retain with petrolatum .
4. New angle cut or full circle teflon seal rings may
appear to be distorted after being installed. Once exposed
to norm al transm ission oil tem peratures, the new seal rings
will return to their norm al shape and fit freely in their bores.
5. The teflon seal rings allow for a free fit in their bores
after operation. The free fit of the rings in their bores does
not indicate leakage during operation.
J - 2 1 3 6 6
Fig. 7A-1 A-Transmission Holding Fixture Fig. 7A-2A--Teflon Oil Seal Rings