Subaru 2009 IMPREZA, Service Manual

Page: 1883 / 3619

4AT-27
Automatic Transmission Fluid
AUTOMATIC TRANSMISSION
2. Automatic Transmission Fluid
A: INSPECTION
NOTE:
The level of ATF varies with fluid temperature. Pay
attention to the ATF temperature when checking
ATF level.
1) Raise the ATF temperature by driving a distance
of 5 to 10 km (3 to 6 miles). Otherwise, idle the en-
gine to raise ATF temperature to 70 — 80°C (158
— 176°F) displayed on Subaru Select Monitor.
<Ref. to 4AT(diag)-16, READ CURRENT DATA,
OPERATION, Subaru Select Monitor.>
2) Park the vehicle on a level surface.
3) After selecting all positions (P, R, N, D), set the
select lever in “P” range. Idle the engine for 1 or 2
minutes, and measure the ATF level.
4) Make sure that the ATF level is higher than the
center point between upper and lower marks of the
HOT side.
If the fluid level is below the lower mark, check the
transmission for leaks. If there are leaks, it is nec-
essary to repair or replace gaskets, oil seals, plugs
or other parts.
5) If the ATF level is below the center point be-
tween upper and lower level marks, add the recom-
mended ATF until the fluid level is above the center
point between the upper and lower level marks.
CAUTION:
• Be careful not to exceed the upper level.
• When the transmission is cold, be careful not
to add ATF to the upper level. Overfilling of ATF
may cause oil splashing.
6) Check ATF level after raising ATF temperature
to 70 — 80°C (158 — 176°F) by running the vehicle
again or by idling the engine.
B: REPLACEMENT
1) Lift up the vehicle.
2) Remove the drain plug (ATF) and completely
drain the ATF.
CAUTION:
Immediately after the vehicle has been running
or after idling for a long time, the ATF will be
hot. Be careful not to receive burns.
3) Check the ATF condition. <Ref. to 4AT-28,
CONDITION CHECK, Automatic Transmission
Fluid.>
4) Perform replacement with a new gasket, and
tighten the drain plug (ATF).
Tightening torque:
25 N·m (2.5 kgf-m, 18.4 ft-lb)
5) Lower the vehicle.
6) Pour ATF from the oil charge pipe.
Recommended fluid:
<Ref. to 4AT-3, HYDRAULIC CONTROL AND
LUBRICATION, SPECIFICATION, General De-
scription.>
CAUTION:
Be sure to use the recommended or equivalent
ATF. Using material except recommended one
or substitute would cause trouble.
Capacity:
Refill with the same amount of ATF that was
drained from drain plug hole.
Capacity when transmission is overhauled:
9.3 — 9.6
2
(9.8 — 10.1 US qt, 8.2 — 8.4 Imp qt)
7) Bleed the air of control valve.
<Ref. to 4AT-61, PROCEDURE, Air Bleeding of
Control Valve.>
8) Check the level and leaks of ATF.
<Ref. to 4AT-27, INSPECTION, Automatic Trans-
mission Fluid.>
(A) ATF level gauge
(B) Upper level
(C) Lower level
AT-01323
COLD
LF
HOT
LF
(C)
(C)
(B)
(B)
(A)
(A) Oil pan
(B) Drain plug (ATF)
AT-04829
(B)
(A)