tow NISSAN 300ZX 1984 Z31 Automatic Transmission Workshop Manual

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

DISASSEMBLY
1. Remove torque converter, drain A.T.F
through end of
rear extension, and place trans-
mission on
Tool.
v
SAT520
2 Remove lock-up solenoid (E4N71B).
3. Remove converter housing.
SATOW
4. Remove oil pan and inspect its contents. An
analysis of any foreign matter can indicate the
types of problems to look for. If the fluid
IS
very dark, smells burned, or contains foreign
particles, the frictional material (clutches,
band.) may need replacement. A tacky film
that will not wipe clean indicates varnish bulld
up which can cause valves, servo, and clutches
to stick and may inhibit pump pressure.
SAT006
5. Loosen 2nd band servo piston stem lock nut
and tighten piston stem.
If it turns more than
two turns, the band
is worn out.
SAT71 5
AT-22

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SLOlVS

REPAIR FOR COMPONENT PARTS
Low & Reverse Brake
In regard to the number of clutch sheets (drwe plate and driven platel. refer to S D S
Toward front
Sprmg thrust rkng
Low and reverse return spring
Return thrust washer
Drwen plate (Steel platel
\-Retainer plate
Snap rlng
INSPECTION
Examine for damaged drive plate facing and
worn snap ring.
Check drive plate facing for wear; if necessary,
replace
Drive plate thickness:
Standard
Allowable limit
1.90 - 2.05 mm (0.0748 - 0.0807 in)
1.8 mm (0.071 in)
seal ring
SAT729
AT-44

REPAIR FOR COMPONENT PARTS
Planetary Carrier
INSPECTION
Check clearance between pinion washer and
planetary carrier with a feeler
Standard clearance.
Wear
limit:
0.20 ~ 0.70 mm (0.0079 - 0.0276 in)
0.80 mm (0.0315 in)
Feeler gauge-,
SAT730
0 Check planetary gear sets and bearings for
damaged or worn gears.
-Connecting Drum Assembly-
If one-way clutch IS out of order as determined
during disassembly, repair
it as follows
1. Remove each snap ring, then draw out one-way
clutch inner & outer race
-Connecting drum
SAT562
2. Inspect one-way sprag and contacting surface
for wear or burns.
Replace parts
as necessary.
3. Assemble those parts.
-Toward front of vehicle
SAT563
AT-48