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Perform Maintenance Every (Where time and mileage
are listed, follow the interval that occurs first.)
Maintenance Items Miles Kilometers or Months
Replace the engine air cleaner filter. 30,000 50 000 30
Inspect the transfer case fluid. 30,000 50 000 30
Replace the top row of spark plugs on 4.7L engines.
**
30,000 50 000 30
Replace the spark plugs on 3.7L engines. 30,000 50 000 30
Change the automatic transmission fluid & main
sump filter, if using your vehicle for any of the follow-
ing: police, taxi, fleet or frequent trailer towing (4.7L
engines only).
60,000 100 000 60
Change the automatic transmission fluid & main
sump filter, if using your vehicle for any of the follow-
ing: police, taxi, fleet or frequent trailer towing (3.7L
engines).
60,000 100 000 60
392 MAINTENANCE SCHEDULES
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