Automatic Transmission Fluid
When
to
Check and Change
A good time to check your automatic transmission fluid level is when the
engine oil is changed. Refer to the Maintenance Schedule to determine
when to change your fluid. See “Scheduled Maintenance Services” in the
Index.
How
to
Check
Because this operation
can
be a little difficult, you may choose to have this
done at your GM dealership Service Department.
If
you
do it yourself, be sure to follow all the instructions here, or
you
could
get a false reading on the dipstick.
I
NOTICE:
Too
much or too little fluid can damage your transmission. Too
much can mean that some of the fluid could come out and fall
on
hot engine parts
or
exhaust system parts, starting a fire. Be sure
to
get an accurate reading if you check your transmission fluid.
Wait at least
30
minutes before checking the transmission fluid level
if
you
have been driving:
When outside temperatures
are
above
90°F
(32°C).
0
At high speed for quite
a
while.
0
In heavy traffic
-
especially
in
hot weather.
0
While pulling
a
trailer.
To
get the right reading, the fluid should be at normal operating
temperature, which
is
180°F
to
200°F
(82°C
to 93°C).
To
check
transmission
fluid
hot:
Get the vehicle warmed up by driving
about
15 miles
(24
krn)
when outside temperatures are above
50°F
(
1
0°C).
If
it’s colder than
50°F
(lO”C),
drive the vehicle
in
THIRD GEAR (D) until
the engine temperature gage moves and then remains steady for ten minutes.
Then follow the hot check procedures.
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