parking brake NISSAN 300ZX 1984 Z31 Automatic Transmission Workshop Manual

REMOVAL AND INSTALLATION
installation (Cont'd)
Check inhibitor switch for operation
Check fluid level
in transmission.
Move selector lever through
all positions to be
sure that transmission operates correctly.
With parking brake applied, rotate engine
at
idling Move selector lever through "N" to
"D", to "2". to "1" and to "R" A slight shock
should
be felt by hand gripping selector each
time transmission
is shifted.
Check to be sure
that line pressure is correct.
To do this, refer to Line Pressure Test
Perform stall test.
AT-I 9,

DISASSEMBLY
27 Remove rear extension.
Be careful not to lose retainer washer.
rWarher
SAT537
2% Remove output shaft with governor.
11 SAT019
29. Remove governor thrust washer and needle
bearing.
Remove one-way clutch inner race attaching
hex-head slotted bolts using
Tool
30. Remove one-way clutch inner race, return
thrust washer, low and reverse return spring,
and spring thrust ring.
31. ,Apply air pressure to remove low and reverse
brake piston
. ' SAT022
32. Remove snap ring, then remove lock nut,
manual plate and parking rod.
y- - " -
SAT720
33 Remove Inhibitor switch and manual shah.
34. Remove
O.D. indicator switch and O-ring.
AT-27

ASSEMBLY
1. Install parking rod, manual plate, manual plate
lock nut, parking brake lever and snap rings.
Ob/-- 0 - 0- 7
SAT720
2 Lubricate and install low and reverse piston
into the case.
SATM8
3 Install thrust ring, piston return spring, thrust
washer and oneway clutch inner race.


4. Install hex-head slotted bolts.
Check that return spring is centered on race before
tightening.
AT135
5 Install steel dished plate first, then steel and
friction plates, and, finally, retaining plate and
snap-ring
AT129
AT-50

ASSEMBLY
Air check point
Governor feed (From
valve) Forward clutch Control
LOW & reverse
brake
SAT586
37 Check that parking pawl, pin, spring and
washer are assembled correctly.
rWasher
SAT739
38. Install rear extension
39. Install control valve assembly. Be sure manual
valve
is in alignment with selector pin Tighten
control valve
body attaching bolts.
Securing bolt comes in three different lengths.
1 40 mm I1 57 ml
2 35 mm I1 38 m) 3 25 mm IO 98 1n1
After installing control valve to transmission case,
make sure that control lever can be moved to all
positions.
40 Before installing vacuum diaphragm valve,
measure depth of hole in which
it is inserted
This measurement determines correct rod
length to ensure proper performance.
"L ' Depth
Vacuum Diaphragm rod , throttle;alve / Valve body ride plate
AT-60

TROUBLE-SHOOTING AND DIAGNOSES
Preliminary Checks
(Prior to Road Testing)
FLUID LEAKAGE
To detect a fluid leak
1) Raise vehicle
2) Clean area suspected of leaking
3) Start engine, apply foot brake, place control
lever in drive, and wait a few minutes
4) Stop engine
5) Check for fresh leakage
FLUID CONDITION
Examine the AT F and note its color, texture,
and odor
1) Dark of Black Fluid
With a burned odor
- Worn friction material
2) Milky Pink Fluid Water Contamination
- Road water entering through filler
tube or breather
3) Varnished Fluid, light to dark brown and
tacky Oxidation
- Over or Underfilling
- Overheating
- Road Testing
Before starting road tests, install vacuum gauge
SAT596
Perform road tests, using "Symptom" chart, as
follows
"P" RANGE
1 Place the control lever in "P" range and start
the engine Stop the engine and repeat the
procedure in all other ranges and neutral
2. Stop vehicle on a slight upgrade and place con-
trol lever
in "P" range Release parking brake
to make sure vehicle remains locked
"R" RANGE
1 Manually shift the control lever from "P" to
"R", and note shift quality
2 Drive the vehicle in reverse long enough to
detect slippage or other abnormalities
"M" RANGE
1 Manually shift the control lever from "R" and
"D"
to "N" and note quality.
2. Release parking brake with control lever in
"N" range Lightly depress accelerator pedal to
make sure vehicle does not move (When
vehicle
is new or soon after clutches have been
replaced, vehicle may move slightly This
IS not
a problem )
"D" RANGE
1 Manually shift the gear selector from "N" to
"D" range, and note shift quality.
-
AT-63

TROUBLE-SHOOTING AND DIAGNOSES
Pressure Testing ~ ~~
2
LINE PRESSURE
1 Install
pressure gauge to line pressure port
785 - 1,128 (8 0- 11 5, 114- 164)
SAT765
1
2 Warm up engine until engine oil and AT F
reach operating temperatures.
A.T.F. temperature:
3 Set parking brake and block wheels.
4 Measure line pressure at idle and at stall point
while depressing brake pedal
fully
50 ~ 80°C (122 - 176°F)
275 - 373 (2 8.3 8.40.54)
At idling
VG90E engine without turbo
Range 1 Line pressure kPa (kg/crn2. psi)
R I 451 -588(46-60,65-85)
D 1 275-373(28-38.40-54)
2 I 785.1,079 (80- 11 0,114- 156)
1 1 275-373(28-38.40-54)
VG3OE turbo engine
Range Line pressure kPa (kg/cm2, psi)
304-441 (31-45.44-64)
275
- 373 (2 8.38.40.54)
At stall test
1 Start engine and place select lever in "D"
range
2 Apply foot brake and accelerate to wide-open
throttle
3 Quickly note the line pressure and immediately
release throttle
4 Shift select lever to "N".
5 Cool off A.T F.
6 Perform line pressure testing in the same man-
ner as in steps 2 through 6 with select lever
in
"2". "1" and "R", respectively.
Do not perform tests for more than five
seconds
at any shift range.
Do not proceed to next "range" test imrnedi-
ately after one "range"
test is done. Wait until
oil temperature decreases
AT-91

TROUBLE-SHOOTING AND DIAGNOSES
Stall
The stall test is an effective method of testing
clutch and band holding ability, torque converter
one-way clutch operation, and engine performance
A
stall test should only be performed as a last
resort because of the high fluid temperature it
generates and the excessive load it places on the
engine and transmission.
CAUTION:
a. Transmission and engine fluid levels should
b
c.
d
always be checked and fluid added as needed.
Run engine to
attain proper warm-up.
During test, never
hold throttle wide-open for
more than
5 seconds
Do not test more than two gear ranges without
driving vehicle to
cool off engine and trans-
mission
STALL TEST PROCEDURE
1 Set parking brake and block wheels
SAT597
2 Install a tachometer where it can be seen by
driver during
test
3 Start engine and place select lever in "D"
range
4 Apply foot brake and accelerate to wide-open
throttle
5 Quickly note the engine stall speed and imme-
diately release throttle
Stall revolution:
VG30E engine without turbo
VG30E turbo engine
2,150 - 2,450 rpm
2,500 - 2,800 rpm
SAT598
6
7 CooloffAT F
8 Perform stall tests in the same manner as in
steps 3 through 7 with select lever in "1" and
"R", respectively
Shift select lever to "N"
AT-93

SERVICE DATA AND SPECIFICATIONS (S.D.S.)
Tig hteni
Untt Nm kg-m ft-lb
Transmission mrtallation Drive plate to 137-157 140-160 101.116
Crankshaft
Drive plate to torque 39.49 4 0.5 0 29.36
converter
Converter housing to
39 - 49 4 0 - 5 0 29 - 36
engme
Rearmountingbracket
31 -42 32-43 23-31
to transmissnon
Rear mounting bracket
31 -42 3 2 - 4 3 23 - 31
to rear insulator
Rear mounting
member 59 - 78 6 0.8 0 43.58
to body
Camponent part
Transmission case to
converter housing
Transmission
case IO
rear extension
Od pan to transmissJon
case
2nd servo piston
retainer to trans- mission case
2nd piston stem (when adjusting band brake)
2nd mston stem lock nut
Onway clutch inner
race to transmission
Control valve body to
transmission case
Wle
44.54
20.25
5-7
7-9
'12-15
15-39
13-18
54-74
45-55 33-40
20-25 14-18
05-07 36-51
07-09 51-65
'12-15 *9.11
15-40 11-29
13-18 9-13
055-075 40-54
Lower valve body to 25-34 025-035 18-25
upper valve body
0 D servo pinon 10- 15 10-15 7-11
retainer to 0 D case
0 D stem (when 7-10 07-10 51-72
adjusting band brake)
0.D stem lock nut 15-39 15-40 11-29
Side Plate to Control 25-34 025-035 18-25 valve body
Nut for control valve 5-7 05-07 36-51
reamer bolt
011 strainer to lower 3-4 03-04 22-29
valve body
Governor MIM body to 5 - 7 05-07 36-51
011 distrtbutor
O*, pump housing to 6-8 06-08 43-58 011 pump cover
Inhibitor switch
to 5-7 05-07 36-51
transmission case
I Torque
U"lt Nm kgm ft Ib
Manual shaft lock nut 29.39 30-40 22-29
011 cooler pipe to 29 - 49 30-50 22-36 transmission case
Test plug
lo11 pressure 14-21 14-21 10-15 inspection hole)
Support actuator 8- 11 08-11 58-80
(parking rod inserting
position) to
rear
extension
Drum support to 7-9 07-09 51-65 0 D case
* Turn back two turns after tightening