Chevrolet 1998 Tracker Owner's Manual page 254

Automatic Transmission Fluid
3. Pull out the filter and replace it.
4. Replace the cover and the screws.
When to Check and Change
A good time to check your automatic transmission fluid
level is when the engine oil is changed.
Change both the fluid and filter every 15,000 miles
(25 000 km) if the vehicle is mainly driven under one
or more of these conditions:
In heavy city traffic where the outside temperature
regularly reaches 90
O F
(32
O
C) or higher.
0
In hilly or mountainous terrain.
0
When doing frequent trailer towing.
Uses such as found in taxi, police or delivery service.
If you do not use your vehicle under any of these
conditions, change the fluid and filter every
100,000 miles (166 000 km).
See "Scheduled Maintenance Services" in the Index.
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