Subaru 2009 IMPREZA, Service Manual

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4AT-17
General Description
AUTOMATIC TRANSMISSION
C: CAUTION
• Wear appropriate work clothing, including a cap,
protective goggles and protective shoes when per-
forming any work.
• Remove contamination including dirt and corro-
sion before removal, installation or disassembly.
• Keep the disassembled parts in order and pro-
tect them from dust and dirt.
• Do not place the oil pan with its inner side facing
up until it is installed, to prevent intrusion of foreign
matter into the valve body.
• Before removal, installation or disassembly, be
sure to clarify the failure. Avoid unnecessary re-
moval, installation, disassembly and replacement.
• When disassembling the case and other light al-
loy parts, use a plastic hammer to force it apart. Do
not pry apart with screwdrivers or other tools.
• Vehicle components are extremely hot after driv-
ing. Be wary of receiving burns from heated parts.
• Use SUBARU genuine gear oil, SUBARU genu-
ine ATF, and specified grease or equivalent. Do not
mix gear oil, grease, etc. of different grades or
manufacturers.
• Be sure to tighten bolts and nuts to the specified
torque.
• Place lifts, shop jacks or rigid racks at specified
locations.
• Apply gear oil or ATF onto sliding or revolution
surfaces before installation in view of components
usage.
• Replace deformed or damaged snap rings with
new parts.
• Before installing O-rings or oil seals, apply suffi-
cient amount of ATF fluid to avoid damage and de-
formation.
• Be careful not to incorrectly install or fail to install
O-rings, snap rings and other such parts.
• Before securing a part on a vise, place cushion-
ing material such as wood blocks, aluminum plate,
or cloth between the part and the vise.
• Avoid damaging the mating surface of the case.
• Before applying liquid gasket, completely re-
move the old liquid gasket.
• When disassembling or assembling the AT, be
sure to use nylon gloves and paper towels. Do not
use cloth gloves or waste cloth.