Subaru XT 1988 Service Manual page 576

3-2
AUTOMATIC TRANSMISSION AND DIFFERENTIAL
4) 4WD TRANSFER CONTROL
------
Type of control
Gear position
Remarks
OJ
Basic control
Regulates transfer oil pressure
1st thru 4th and
Normal control
in response to throttle position
reverse
and vehicle speed.
g
:s
. .
...
~
..,
c
...
..,
::T
..,
.,
'C
.,
..,
;::;.
<
0
50
100
Fig. 88
Duty ratio (%)
L3-935
m
Control in 1 st
Increases transfer oil pressure
1st hold range
hold range
(as compared with basic
-
control
OJ .)
m
Control during
Returns transfer oil pressure 1st thru 4th and
Release:
"slip" detection
to the same as in 1st hold
reverse At more than set vehicle
range immediately after "slip"
speed and fully closed
detection.
throttle
[I]
Control in turns
Decreases transfer oil pressure
1st thru 4th and
upon detection of vehicle
reverse
-
turns.
62