oil change NISSAN 300ZX 1984 Z31 Automatic Transmission Workshop Manual

Prmary valve ~~
Wire
dia
(In)
(0 5 - 0 7 kg-m,
Installed Outer mil
dia
mm (in)
No of Free length
active coil mm (in) Length
mm (in) N (kg, Ib)
- \01i distributor
VG30E Primary
governor VG30E turbo
SAT560
0 65 (0 0256) 8 95 (0 3524)
0 45 (0 0177) 8 75 (0 3445)
4 4
50 10 5 (0 413)
21 8 (0 858)
7 5 (0 295)
7
5 (0 295)
2 109 (0 215,O 474)
2 109 (0 215,O 474)
mor
VG30E Secondary
0 Check valves for burning or scratches. Inspect
springs for weakness or burning Replace parts
as necessary
Do not interchange components of primary and
secondary governor valves
GOVERNOR VALVE SPRING CHART
0 70 (0 0276) 9 20 (0 3622) 5 5 19 8 (0 780) 10 5 (0 4131 6 9 (0 7,l 5)
rt:A As instaled
Wvernor
SAT039
VG30E turbo 0 70 (0 0276) 9 20 (0 3622) 5 5 19 8 (0 780) 10 5 (0 413) 6 9 (0 7.1 5)
Valve spring
AT-46

TROUBLE-SHOOTING AND DIAGNOSES
Pressure Testing (Cont'd)
Intake manifold
vacuum
kPa (mmHg,
inHsl
VG30E engine without turbo
Propeller $haft
Vehicle speed revolutions
kmlh (MPH)
rpm
Range I Line pressure kPa (kglcm', psi)
Intake manifold
vacuum
kPa (mrnHg.
inHg) ~
R I 1,961 - 2,393
(20 0.24 4,284 .347)
Propeller shaft Vehicle speed
kmlh (MPH) revolutions
rpm
D I 1.079-1,226(110-125,156-178)
2 I 1,079 - 1,275 (11 0.13 0, 156 - 185)
1 I 1,079 - 1,226 (1 1 0 - 12 5, 156 - 178)
VG30E turbo engine
Range I Line pressure kPa (kgtcm', psi)
R I 1,961 - 2,354 (20 0 - 24 0,284 - 341)
D I 1,667 - 1,883 (17 0- 19 2,242 -273)
2 I 1.667-1,883(170-192,242-273)
1 I 1.667-1.8831170-192.242-273)
Judgment by measuring line pressure
If line pressure does not rise, first check to make
sure that vacuum
hose is connected properly.
1) When line pressure is low at all positions, the
problem may be due to
Wear on interior of oil pump
Oil leakage at or around oil pump, control
valve body, transmission case or governor
Sticking pressure regulator valve
Sticking pressure modifier valve
2) When line pressure is low at a particular posi-
tion, the problem may be due to the following
If oil leaks at or around forward clutch (rear)
or governor, line pressure
is low in "D", "2" or
"1" range but is normal in "R" range.
If oil leaks at or around low and reverse brake
circuit, line pressure becomes low in
"R" or
"P" range but IS normal in "D", "2" or "1"
range.
3) When line pressure is high, pressure regulator
valve may have stuck
Cutdown point
The cut-down point indicates
a point where line
pressure changes from high to low value.
Before proceeding cut-down testing, make sure
that line pressure "At Idle" and "At
Stall'' is
normal
Install vacuum gauge
VG30E engine without turbo
28 - 37
o(o'o) I (17-231 I 900- 1,200
12.22
(7 - 14) I 400-700 (-100. -133 -3 94) I
VG30E turbo engine
+467 I 29 - 39 1,200- 1,600 (+350, +13 78) (18 - 24)
13.23
(-200,
-267 -7 871 I (8. 14) 400 - 800
Judgment by cut-down testing
(1) When cut-down point disappears, the problem
Sticking pressure modifier valve
Sticking governor valve
Oil leaks at oil passage
(2) When cut-down point is too low or too high,
the problem may be due to
Incorrect springs (at pressure modifier valve
or governor valve)
Oil leaks at oil passage
may be due to
AT-92