Subaru IMPREZA GD 2007 Series Manual page 2536

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C: CONDITION CHECK
NOTE:
When replacing ATF, check the inside condition of transmission body by inspecting the drained ATF.
Fluid condition
Large amount of metallic pieces are
found.
Thick and varnish-form fluid.
Clouded fluid or bubbles are found in
fluid.
Automatic Transmission Fluid
Trouble and possible cause
Internal metal parts of transmission body are
excessively worn.
Clutch etc. is burned.
Water is mixed.
4AT-29
AUTOMATIC TRANSMISSION
Corrective action
Replace ATF and check if AT operates
correctly.
Replace ATF and check the AT body or
vehicle for faulty.
Replace ATF and check the water enter-
ing point.