NISSAN 300ZX 1984 Z31 Automatic Transmission User Guide

ON-VEHICLE SERVICE
-Extension Oil Seal Replacement-
1. Remove oil seal
. -. .
2 Apply coat of A.T.F. to oil seal surface, then
drive new seal into place.
3 Coat sealing lips with vaseline, then install
propeller shaft
Parking Component
1 Remove oil pan.
2 Remove propeller shaft.
3. Remove speedometer pinion.
SAT51 1
4 Support transmlssion with a jack, then remove
rear mounting bolts.
AT-1 1

~ ~~ ON-VEHICLE
SERVICE
-Parking Component (Cont'd)-
5. Remove rear extension bolts, then draw out
rear extension with rear mounting.
6. Remove control valve assembly.
7. Inspect and repair parking components Check
component
parts for wear or damage.
-Governor Valve Assembly
1 Drain oil by removing oil pan.
2. Remove rear extension with rear mounting
3. Remove governor valve assembly.
4. Inspect and repair governor valve assembly.
Refer to Governor for inspection
-Inhibitor Switch Adjustment-
Disconnect harness at connector, then remove in-
hibitor switch
Check continuity at "N", "F'" and "R" ranges.
VG30E without turbo
VG30E turbo
VG30E wnhout turbo
0
VG30E turbo
SAT710
With control lever held in "Neutral, turn
manual lever
an equal amount in both direc-
tions to see
if current flow ranges are nearly
the same. (Current normally begins to flow
before manual lever reaches
a angle of 1.5" in
either direction.)
If current flows outside normal range, or if
normal flow range is out of specifications,
properly adjust inhibitor switch.
Adjust inhibitor switch as follows
1 Place the manual valve in Neutral (vertical
2. Remove the screw.
position)
AT-I 2

ON-VEHICLE SERVICE
-Inhibitor Switch Adjustrnent-
(Cont'd)
3. Loosen the attaching bolts.
4 Using an aligning pin, [2 0 mm (0.079 in) dia 1
move the switch until the pin falls into the hole
in the rotor
5. Tighten the attaching bolts equally.
6. Recheck for continuity. If faulty, replace the
switch.
--Manual Linkage Adjustrnent-
M,we the shift lever from the "P" range to "Range
1"'. You should be able to feel the detents in each
range
If the detents cannot be felt or the pointer indicat-
ing the range
is improperly aligned, the linkage
needs adjustment
1
2 Loosen locknuts
Place shift lever in "N" range.
3. Move range selector lever to the "N" range.
Range selector lever
SAT741
4 Tighten lock nuts when floor control lever IS in
"N" range and pushed against the "P" range
side.
5. Move control lever from "P" range to "1"
range Make sure that control lever can move
smoothly
and without any sliding noise.
AT-I 3

Vacuum Diaphragm Rod
Adjustment
1. Remove diaphragm from transmission case.
2 Using a depth gauge, measure depth "L". Be
sure vacuum throttle valve is pushed into valve
body
as far as possible.
3 Check "L" depth with chart below and select
proper length rod.
Measured depth "L"
mm (in)
Under 25 55
(1 0059)
25 65
- 26 05
(1 0098
- 1 0256)
26 15
- 26 55
(1 0295 - 1 0453)
26 65
- 27 05
(1 0492 - 1 0650)
Over 27 15
(1 0689)
Vacuum diaphragm
Rod length
mm (in)
29 0
(1 142)
29 5
(1 161)
30
0
(1 181)
30 5
(1 201)
31
0
(1 220)
Vacuum diaphragm
I1
rod
SAT078
Part number
31932- X0103
31932 - XO104
31932- XOlOO
31932- X0102
31932. XOlOl
Downshift Solenoid
1. Remove downshift solenoid and O-ring.
Catch
oil dropping out of the hole.
SAT516
2 Check to verify that downshift solenoid is
operatmg properly. If faulty, replace it with a
new one
SAT517
AT-I4

ON-VEHICLE SERVICE
Kickdown Switch Adjustment
When the pedal is fully depressed, a click can be
heard just before the pedal bottoms out
If the
click
is not heard, loosen the locknut and extend
the switch until the pedal lever makes contact with
the switch and the switch clicks
Kickdown switch 7
F$i& Downshift solenold
qi& Downshift solenold
SAT719
Do not allow the switch to make contact too soon.
This would cause the transmission to downshift on
part throttle.
DIAGNOSIS:
Switch can be heard clicking, and the transmission
still does not kickdown:
Check the continuity of the switch.
Also check for
available current.
The vehicle upshifts
at approximately 55 (1st to
2nd) and
90 kmlh (2nd to 3rd) (34 and 56 MPH)
only The kickdown switch may be internally
shorted (When the switch
is shorted, there IS con-
tinuity through the switch in any position).
AT-I 5

ON-VEHICLE SERVICE
Overdrive Control System (4N71B)
I..
- a2 P
I
*
1
SAT712
AT-1 6

ON-VEHICLE SERVICE
Overdrive Control Sy:
O.D. CANCEL SWITCH 81 O.D.
INDICATOR LAMP
Inspection
Power shift switch
SAT716
O.D. CANCEL SOLENOID
Location
SAT619
?m (4N71B) (Cont'd)
Inspection
Confirm that clicking sound
is heard when power is
applied.
w SAT620
AT-I 7

REMOVAL AND INSTALLATION
Removal
a Remove bolts securing torque converter to
drive plate.
a. Remove those bolts turning crank shaft.
b. Before removing torque converter, inscribe
matching marks on
two parts so that they may
be replaced in their original positions during
assembly.
a Plug up openings such as oil charging pipe, etc.
CAUTl ON :
Take care when dismounting transmission not to
strike any adjacent
parts.
Installation
0
a
a.
b.
a
Drive plate runout
Maximum allowable runout:
0.5 mm (0 020 in)
n
SAT718
If this runout is out of allowance, replace drive
plate and ring gear
When connecting torque converter to trans-
mission, measure distance "A" to be certain
that they are correctly assembled.
Distance "A":
More than
35 mm (1.38 in)
Install converter to drive plate
Align matching marks painted across both parts
during disassembly.
Before installing torque converter securing
bolts, apply locking sealer to threads
of bolts.
After converter is installed, rotate crankshaft
several turns and check to be sure that trans-
mission rotates freely without binding
AT-I 8

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,

MAJOR OVERHAUL
N rn 1kg-m. ft-lb)
@ 39 49140-50.29-361
@ 10- 15110- 15.7-11) @ 44.54 14 5 - 5 5,33 -401
@ 13 18113-1.8.9-13)
011 pump assembly & 5 -7 (05 -07.36.5 1) @ 8- 11 (08- 1.1,58-80)
@ 7 -9 (07 -0 9,5 1 -65)
@I 5 4 - 7 4 10.55 - 0 75,4 0 - 5 4)
@ 5.7 105 -0.7,36 - 5 1) @ 29 39130-40.22-29)
O-ring (E4N71B)'
Converter housing
0 D planetary gear assembly
/
/ Connectmg shell-,
lbp&y ) ,,,rLOck*pcontrol solenotd /~ brakeband , /Thrust washer *-
, /Gasket *
Lathe cut seal Tin& 7
\Thrust washer t
2nd brake band
Drum support
0 D cancel solenold
0 D band brake servo assembly
* Always replace
t Select with proper thcknerr * Adjustment IS requwed
AT-20