Subaru XT 1988 Service Manual page 675

3-2 AUTOMATIC TRANSMISSION AND DIFFERENTIAL
Reference No.
Symptom
On-car check
Abnormal ities during shifting:
•
Shock in 1 ~ 2 shift
3,23,13,10,
70,76
•
Slippage in 1
~
2 shift 3,23,13,10
•
Shock in 2 ~ 3 shift
3, 23, 10, 70,
15, 76
•
Slippage in 2
~
3 shift 3,23,15,10
•
Shock in 3
~
4 shift 3, 23, 10, 70,
14, 76
•
Slippage in 3
~
4 shift 3,23, 14, 10
•
Shock in 3
~
2 shift 3,23, 10,70
•
Shock in D
~
3 shift 3,23,10,70
•
Shock in 2
~
1 shift 3,23,10,70
Shock is felt when accelerator pedal 3,23,10,76
is released at medium speed or above.
Vibration in straight-forward driving 3
Select lever slips out of detents 6,24,25
during acceleration or on rough
roads.
During 4WD operation:
•
Vibration in tight corner 4, 70, 10, 3, 11
•
Front tires slip on start. 5,10,3,11
•
Failure to shift into FWD mode 3,10,8
~
On-Car Service
INSPECTION AND ADJUSTMENT
1. ATF LEVEL
1) Raise the ATF temperature to 60 to 80
0
e
(140 to
176°F). [This temperature may be attained by running a dis-
tance of 5 to 10 km (3 to 6 miles)).
The level of ATF varies with fluid temperature. Pay attention
to the fluid temperature when checking oil level. A change in
the A TF level by oil temperature is shown in the following
figure.
2) Ensure the vehicle is level. After selecting a" positions (P,
R, N, D, 3, 2), set the selector lever in "P" range. Measure
fluid level with the engine idling.
Probable cause
Unit check
Other parts:
63.
Faulty torque converter ring gear
47
64.
Faulty drive plate
47,45
65.
Improper installation of drive
47,45
66.
plate
Torque converter or
owe
burned
43
or broken
67. Worn parts in torque converter
47
68.
Lock-up facing worn
43,47
69.
Faulty lock-up damper
43
70.
Deterioration of ATF
49,43
71. Deterioration of differential oil
69, 77
72.
ATF level too low
73. Differential oil level too low
74. ATF level too high
69, 77 75.
Differential oil level too high
76. Poor engine performance
77. Lock-up clutch seized
29, 26, 27, 28,
30
29,26,27,28,
30
26, 27, 28, 29,
30
After running, idle the engine for one or two minutes before
measurement.
3) If the fluid level is below the center between upper and
lower marks, add the recommended ATF until the fluid level
is found within the specified range (above the center between
upper and lower marks). When the transmission is hot, the
level should be above the center of upper and lower marks,
and when it is cold, the level should be found below the center
of these two marks.
Use care not to exceed the upper limit level.
148