Subaru 1600 Service Manual page 335

AUTOMATIC TRANSMISSION AND DIFFERENTIAL
, - - -
Tool No.
Tool Name
398573600
Oil pressure
gauge ASSY
2) Using the socket wrench (7),
remove the pressure check plug from
transmission cover (or intermediate
case.)
3) Attach an oil pressu.re adapter to
the pressure check plug hole in trans-
mission cover (or intermediate case.)
Fig.
7-57
Removing the pressure
check plug
A13-453
Fig. 7-58 Installing the oil pressure
adapter
Tool No.
Tool Name
498897000
Oil pressure
adapter
498597000
Socket wrench
(7)
4) Connect the oil pressure adapter
and the tip end of the gauge ASSY.
5) Run the engine and check the line
pressures with the engine at a
minimum-throttle and full-throttle
operations.
2) Line pressure in each select range
The following table indicates the
relationship between the line pressure
and throttle position in each select
range.
Unit: kPa (kg/cm
2
,
psi)
Throttle
Full throttle
position
-4.0 - 6.7 kPa
Minimum throttle *2
(-30 - 50 mmHg,
-1.18 - 1.97 inHg)
Before* 1
After
Before After
Range
cutdown cutdown cutdown cutdown
834 - 981 539 - 637 294 - 392 294 - 392
D
(8.5 - 10.0, (5.5 - 6.5, (3.0 - 4.0, (3.0 - 4.0,
121-142)
78 - 92) 43 - 57) 43 - 57)
1,000 - 1,157 579 - 677
1,000 - 1,157 579 - 677
2
(10.2 - 11.8, (5.9 - 6.9,
(10.2-11.8, (5.9 - 6.9,
145 - 168) 84 - 98) 145 - 168) 84 - 98)
R
1,373 - 1,569
461- 559 (4.7 - 5.7,67 - 81)
(14.0 - 16.0,199 - 228)
NOTES:
*1: The "cutdown point" refers to those points where the line pressure in each
shift range (1, 0, 2 and R) changes in steps or where the pressure modifier
valve activates. The "before cutdown" refers to the state of the line pressure in
which the engine is running at low speeds and the car speed is below approxi-
mately 15 kmlh (9 MPH), while the "after cutdown" refers to the state of line
pressure in which the engine is running at high speeds and the car speed is
above approximately 35 kmlh (22 MPH).
*2: The line pressure, while the engine is idling, corresponds to the oil pressure of
the "before cutdown" with the engine at the minimum throttle operation.
3) Interpretation of line pressure
1) Car in the FWD (front-wheel drive) mode
Symptom Probable cause
Low
•
Oil pump worn or clearance im-
properly adjusted.
Engine at idle
•
Leakage in oil pressure circuit.
(1,500 rpm)
• Pressure regulator valve inoperative.
in N range
High
•
Leakage at vacuum hose or vacuum
diaphragm or diaphragm too long.
•
Pressure regulator valve jamming.
Pressure will
•
If pressure fails to rise even though
,not rise. vacuum pressure drops, check to
see if diaphragm rod was not in-
Engine at full
stalled.
throttle
Pressure rises
•
In most cases problems may be due
but does not to jamming of vacuum throttle
enter specified valve, pressure regulator valve or
range. pressure regulator plug.
NOTE:
Change of the diaphragm rod by one rank or [0.5 mm (0.020 in)] causes the line
pressure to change approximately 29 kPa (0.3 kg/cm
2 ,
4 psi).
7-40