Subaru XT 1988 Service Manual page 562

3-2 AUTOMATIC TRANSMISSION AND DIFFERENTIAL
CV
Power pattern to normal pattern
The power pattern is shifted to the normal pattern, depending
on car speed. Shifting to the normal pattern is determined by
the throttle position as shown in Figure below. Time lag in
shifting is also determined by car speed. The maximum time
lag is 3 seconds.
Large
~---~--------r-----,------,
t
Throttle
opening
~
Small
Fig. 67
Low-
(2) Shift Control
Power
Vehicle speed
-High
L3-825
Gearshifting is controlled in response to driving conditions,
according to the shift point characteristic data, as shown in
the following diagram, stored in the AfT control unit.
Solenoids are operated at the proper time corresponding to
the shift pattern, throttle opening, and vehicle speed for
smooth shifting.
48
100~-~-"-Tr-----r----r'~I,,-r--~-'~r-~
I
(
I
I
I
I
I
I
I
I
I
I
I
I
I
,...--'
I
1_2
I
I
I
I
I
I
- - '
O~LiL-L-~-LL-
__ L-__ L-__ L-__
~~~~
o
20 60 80 100 120 140 160 180
(0) (12) (37) (50) (62) (75) (87) (99) (112)
Vehicle speed km/h (MPH)
L3-647
Fig. 68
When oil temperature is below approximately 10 0 C (50 0 F),
the vehicle cannot be shifted to the 4th range.