GENERAL SERVICE NOTICE
Repai
Before proceeding with disassembly, thorough-
ly clean the outside of the transmission It IS
important to prevent the internal parts of the
transmission from becoming contaminated by
dirt or other foreign matter.
Disassembly should
be done in a clean work
area. Use
a nylon cloth or paper towel for wiping
parts clean. Common
shop rags can leave lint
that might interfere with the transmission's
operation.
When disassembling parts, be sure to place
them in order
in parts rack so they can be put
back in the unit
in their proper positions
All parts should be carefully cleaned with a
general purpose, non.flammable solvent before
inspection or reassembly.
Gaskets,
seals, and O-rings should be replaced.
It is also very important to perform functional
tests whenever it is designated.
The valve body contains many precision parts
Contri
CONTROL VALVE UPPER BODY
3rd4th shift valve7
Pressure I
Uotes
and requires extreme care when parts are
removed and serviced. Place removed parts on
a parts rack so they can be put back in the
valve body in the same positions and
se-
quences. Care will also prevent springs and
small parts from becoming scattered or
lost
Before assembly, apply a coat of recommended
A
T.F. to all parts Vaseline may be applied to
O-rings and
seals. Do not use any grease.
Care should be taken to avoid damaging
O-rings, seals and
gaskets when assembling
Abbreviations used throughout this section stand
for the following.
A.T.F. ... Automatic transmission fluid
D, ........ Drive range 1st gear
D, .... ... Drive range 2nd gear
D, . . ... Drive range 3rd gear
D4 ........ Drive range 4th gear
0.D . .... Overdrive
1, ....... . 1 range 2nd gear
1, . . .... 1 range lstgear
Valve
Vacuum throttle valve
f rThrottle back-up valve
1st 2nd shift valve
2nd3rd shift valve
Second lock valve -i
SAT742
AT-4
