Transfer Clutch Pressure Test - Subaru Legacy 2003 Service Manual

AUTOMATIC TRANSMISSION
8. Transfer Clutch Pressure
Test
A: INSPECTION
1. TEST METHODS
• MPT model
Check the transfer clutch pressure in accordance
with the following chart in the same manner as with
line pressure. <Ref. to AT-36, Line Pressure Test.>
ST 498897700 OIL PRESSURE ADAPTER
SET
ST 498575400 OIL PRESSURE GAUGE
ASSY
AWD mode: "D" range
FWD mode: "P" range, engine speed 2,000 rpm
NOTE:
Before setting in FWD mode, install the spare fuse
on FWD mode switch.
(A) Test plug
• VTD model
Check transfer clutch pressure using the following
chart. <Ref. to AT-36, Line Pressure Test.>
ST 498897700 OIL PRESSURE ADAPTER
SET
ST 498575400 OIL PRESSURE GAUGE
ASSY
(A) Test plug

TRANSFER CLUTCH PRESSURE TEST

( A )
AT-00021
( A )
AT-00676
2. EVALUATION
• MPT model
NOTE:
If oil pressure is not produced or if it does not
change in the AWD mode, the transfer duty sole-
noid or transfer valve assembly may be malfunc-
tioning. If oil pressure is produced in the FWD
mode, the problem is similar to that in the AWD
mode.
Standard transfer clutch pressure kPa (kg/cm
ON Duty Throttle
ratio (%) position
5 Full open
60 2/3 throttle
95 Full closed
• VTD model
Duty ratio
(%)
opening angle
95
60
AT-38
AWD mode
951 — 1,089
(9.7 — 11.1, 138 —
158)
226 — 294
(2.3 — 3.0, 33 — 43)
—
Standard of transfer clutch
Throttle
pressure kPa (kg/cm
951 — 1,089
Fully open
(9.7 — 11.1, 138 — 158)
226 — 294
2/3 open
(2.3 — 3.0, 33 — 43)
2
, psi)
FWD
mode
—
—
0 (0, 0)
2
, psi)