Subaru XT 1988 Service Manual page 619

3-2 AUTOMATIC TRANSMISSION AND DIFFERENTIAL
SERVICE PROCEDURE
[IJ General Precaution
When disassembling or assembling the automatic transmission
observe the following instructions. '
1) Workshop
Provide a place that is clean and free from dust. Principally
the conventional workshop is suitable except for a dusty place.
In a workshop where grinding work, etc. which produces fine
particles is done, make independent place divided by the vinyl
curtain or the equivalent.
2) Worktable
The size of 1 x 1.5 m (40 x 60 in) is large enough to work, and
it is more desirable that its surface be covered with flat plate
like iron plate which is not rusted too much.
3) Cleaning of exterior
(1) Clean the exterior surface of transmission with steam
and/or kerosene prior to disassembly, however it should
be noted that vinyl tape be placed on the airbreather or
oil level gauge to prevent infiltration of the steam into the
transmission and also the cleaning job be done away from
the place of disassembly and assembly.
(2) Partial cleaning wi II do, depending on the extent of
disassembly (such as when disassembly is limited to some
certain parts).
4) Disassembly, assembly and cleaning
(1) Disassemble and assemble the transmission while
inspecting the parts in accordance with the Trouble-
shooting.
(2) During job, don't use gloves.
Don't clean the parts with rags: Use chamois or nylon
cloth.
(3) Pay special attention to the air to be used for
cleaning.
Get the moisture and the dust rid of the air as much as
possible.
Be careful not to scratch or dent any part while checking
for proper operation with an air gun.
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(4) Complete the job from cleaning to completion of
assembly as continuously and speedily as possible in order
to avoid occurrence of secondary troubles caused by dust.
When stopping the job unavoidably cover the parts with
clean chamois or nylon cloth to keep them away from
any dust.
(5) Use kerosene, white gasoline or the equivalent as
washing fluid.
Use always new fluid for cleaning the automatic transmis-
sion parts and never reuse. The used fluid is usable in
disassemble and assemble work of engine and manual
transmission.
(6) Although the cleaning should be done by dipping into
the washing fluid or blowing of the pressurized washing
fluid, the dipping is more desirable. (Do not rub with a
brush.) Assemble the parts immediately after the cleaning
without exposure to the air for a while. Besides in case of
washing rubber parts, perform the job quickly not to dip
them into the washing fluid for long time.
(7) Apply the automatic transmission fluid (ATF) onto
the parts immediately prior to assembly, and the specified
tightening torque should be observed carefully.
(8) Use vaseline if it is necessary to hold parts in the
position when assembling.
(9) Drain ATF and differential gear oil into a saucer so
that the conditions of fluid and oil can be inspected.
(10) Do not support axle drive shaft, stator shaft, input
shaft or various pipes when moving transmission from one
place to another.
(11) Always discard old oil seals and bushings, and install
new ones.
(12) Do not reuse old pipes, gaskets, plugs (1/8"), spring
pins, etc. .
Install new ones.
(13) Be sure to replace parts which are damaged, worn,
scratched, discolored, etc.