Subaru XT 1988 Service Manual page 677

3-2
AUTOMATIC TRANSMISSION AND DIFFERENTIAL
Converter case
• Converter case
• Axle shaft oil seal
• O-ring on the outside diameter of axle shaft oil seal holder
• O-ring on the differential oil gauge
• Differential oil drain plug
• Speedometer cable mounting portion
• Location of steel balls
Oil pump housing
• Oil pump housing (Defective casting)
• O-ring on the test plugs
• Checking blind plugs
• Differential gear breather
Automatic transmission case
• Transmission case (Defective casting)
• Mating surface of oil pan
• O-ring on the test plugs
• Checking blind plugs (steel balls)
• Oil supply pipe connector
• ATF cooler pipe connector and gasket
• Oil pan drain plug
• O-ring on the transmission harness holder
• O-ring on the oil pump plugs
• ATF breather
• Shift lever oil seal
Extension case
• Extension case (Defective casting)
• O-ring on the revolution sensor
• Rear drive shaft oil seal
• Checking blind plugs (steel ball)
• O-ring on the test plug
Transmission cover
• Transmission cover (Defective casting)
The point listed above should be checked for fluid leak.
Checking method is as follows:
(1) Place the vehicle in the pit, and check whether the
leaking oil is ATF or not. The ATF is wine red in color,
and can be discriminated easily from engine oil and gear
oil.
(2) Wipe clean the leaking oil and dust from a suspectable
area, using a noninflammable organic solvent such as
carbon tetrach loride.
(3) Run the engine to raise the fluid temperature, and set
the selector lever to "D" in order to increase the fluid
pressure and quickly detect a leaking point.
4.
ENGINE IDLING SPEED
Excessively low engine idling rpm will lead to rough engine
operation and excessively high idling rpm will lead to a sudden
shift shock or creeping when shifting from N to D or R.
Idling rpm for automatic transmission cars (N or Prange):
1800: 800±100 rpm
2700: 750±100 rpm
5. BRAKE BAND
If the following abnormal shifting conditions are noted in a
road test, the brake band must be adjusted.
• Shift state and adjustment
1) The 2nd gear state and 4th gear state can be achieved but:
• the engine rpm increase excessively shifting up from 2nd to
3rd.
• a shift delay (over 1 sec) accompanies at kickdown from
3rd to 2nd.
If any of these problems occurs, it is attributable to excessive
clearance between the reverse clutch drum and brake band:
Tighten the adjust screw by turning it clockwise.
2) The 2nd gear state and 4th gear state can be achieved,
but:
• a braking phenomenon is noted when shifting up from 2nd
to 3rd.
If this phenomenon is noted, it is attributable to excessively
small brake band clearance: Loosen the adjust screw by
turning it counterclockwise.
3) When accelerating, direct shift up from 1st to 3rd occurs:
. . . . . . . . . . . . . . . . ' . . . . . . . Excessively large clearance.
When shifting up from 2nd to 3rd, tire slip occurs:
. . . . . . . . . . . . . . . . . . . . , .. Excessively small clearance.
L3-787
Fig. 284
150