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
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
TROUBLE-SHOOTING AND DIAGNOSES
STALL TEST ANALYSIS
“D range test
NG OK
Stall revolution is
I
1 Too low 4 1 Too high Lock-up clutch is dragging,
converter one-way clutch
is
engine is not performing
properly
4 Direct clutch, forward
clutch (Rear) or one-way
clutch slips damaged (shpping), or
Lock-up clutch is dragging.
convener one-way clutch
is
engine is not performing
properly
I High-reverse clutch
(Front) or low
& rev
brake slips damaged (slipping), or
whether high-reverse clutch
(Front) or low &rev brake
OK NG
One-way Direct clutch or
clutch slips forward clutch
(Rear) slips
When shift select lever IS
In “1” range
OK
No engine braking Effective engine (Rear) slips slips
braking
I
High-reverse
clutch (Front)
slips
Low & rev brake
slips
If converter one-way clutch is frozen, vehicle will have poor high speed performance. If converter one-way
clutch
is slipping, vehlcle will be sluggish up to 50 or 60 kmlh (30 or 40 MPH)
AT-94
SERVICE DATA AND SPECIFICATIONS (S.D.S.)
General Specifications
X8075 Engine model ~ I VG30E t VG30Eiurbo X8006 -
Autamatictranrmirrion model I E4N71B I 4N71B ~~
Stall torque ratlo
Transmission gear ratio
1st
2nd
TOP OD
Reverse
Recommended 011
1 X8075 1 X8006 Tianrmwon model code
number ~
20 1
2 458
1458
1000
0 686
2 182
Aurornar~c lranmwon fluid 'oexro" type
2 0 IO 0791
Oil capacity
2 2 (0 0871
7 0 hferr
17-3/8 US qt, 6-1/8 Imp qtl
5 6 (0 220)
5 8 (0 2281
6 0 (0 2361 6 2 IO 2441
6 4 10 2521
6 6 10 2601 6 8 (0 2681
7 0 (0 2761
--Specifications and Adjustment,
31567-XZ903
31567-XZ904
31567-XZ905
31567-XZ906
31507-X86W
31507-X8601
31537-XZ800
31537-XZ801
Tr.msmirrmn model code number
Torque converter assembly
Srarnped mark on the
torque COnYerter
Number of drive plates
Number of driven plates
Clearance rnm Ion1
Standard Allowable limit
Drive plate thickness mm (in1
Standard
Allowable limit
Thlcknesr of retamng
Dlate
1 GC GK
1 50 1 65 (0 0591 .O 06501
1 4 (0 0551
Thickness I numbel Part
mrn Iml
Thickness number
AT-95
SERVICE DATA AND SPECIFICATIONS (S.D.S.)
Specifications and Adjustment (Cont'd)
Total end play mmitn~ 025-0501ooo9a 001971
Thickness of 011 pump cover
bearing race
0 D total end play mm 11")
Thickness
mm (in1
0 25 - 0 50 10 0098.0 01971
1 2 IO 0471
1 4
(0 0551
1
6 IO 0631
1
a IO 071 I
2 0 10 0791
2 2 IO 0871
Thicknessof 0 D bearing race
Part number
31556-X0100
31556-X0101
31 556-X0102
31556-XO103
31556-X01M
31556-XO105
12 100471 31556-X0100
14 10 0551 31556-X0101
16 100631 31556-X0102
18 I00711 31556-XO103
20 (00791 31556-XO104
22 (ooa7) 31556.~0105
Thickness of 0 D thrust
washer
Thickness
mm
Iml
1 5 10 0591
1
7 10 067)
1 9
IO 0751
21
100831
23 100911
2 5 IO ogai
27(01061
Part number
3 1528-xoi 06
31528-x0105
3 i52a-xoi
00
3152a.xoioi
3 i5za-xoi
02
3i5za-xoio3
31
528-XOl W
Thickness
mm (ml Part number
0,I pump clearance mm (in1
Oiiter gear-pump housing 'Standard 0 05.0 20 10 0020 - 0 0079)
Allowable limit o 25 (0 oogai
Oiiter gearIrescent 'Standard o 14 o 21 IO 0055. o 00831
4llowable limit
o 25 IO oogai
Gfiars-pump cover Standard
Allowable
limit 0 02.0 04 IO 0008. o 00161 o oa (0 0031 I
Drum support
Ssal ring-ring groove
Standard 0 05 0 20 IO 0020 0 00791
Allowable
limit 0 20 IO 00791 -
011 dirtriburor
Seal ring-ring groove
Standard 004 -0 16 100016 000631
Allowable limit 0161000631
Planetary carrier mm Id Clearance between pinion
warher and planetary carrier Standard
Allowable
hmlt 080 (003151 0 20 - 0 70 10 0079.0 02761
Run out of 011 pump cover to
hourino mm (in1 Less than 0 07 10 00281
Less than 0 05 (0 00201 Run-out of drum support to 0 CI case mm lml
STALL REVOLUTION
VG3OE engme without turbo 2.150 - 2.450 rpm
2500 - 2.800 rpm VG30E turbo engine
AT-97
