Jeep Automobile - Replace the engine air cleaner filter.; Check the PCV valve, replace if necessary.; Inspect the transfer case fluid.; Replace the top row of spark plugs (4.7 L Only).

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
Check the PCV valve, replace if necessary. Perform
the first inspection at 60,000 miles (100 000 km) or 60
months.
30,000 50 000 30
Inspect the transfer case fluid. 30,000 50 000 30
Replace the top row of spark plugs (4.7L Only). ** 30,000 50 000 30
Replace the spark plugs (3.7L/5.7L Engines). 30,000 50 000 30
Change the automatic transmission fluid & filter if
using your vehicle for any of the following: police,
taxi, fleet or frequent trailer towing.
60,000 100 000 60
Change the transfer case fluid if using your vehicle for
any of the following: police, taxi, fleet, off-road or fre-
quent trailer towing.
60,000 100 000 60
Flush and replace the engine coolant. 102,000 170 000 60
Replace the ignition cables (4.7L Only). 102,000 170 000 102
444 MAINTENANCE SCHEDULES
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