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Operating in dusty conditions such as unpaved or dusty roads
Inspect frequently,
service as required
Replace cabin air filter (if equipped)
Replace engine air filter
Every 5,000 miles
(8,000 km)
Inspect wheels and related components for
abnormal noise, wear, looseness or drag
Rotate tires*, inspect tire wear and measure
tread depth
Every 5,000 miles
(8,000 km) or
6 months
Change engine oil and filter
Inspect and lubricate U-joints
Every 5,000 miles
(8,000 km),
6 months or 200
engine hours
Change engine oil and filter
Every 30,000 miles
(48,000 km)
Change automatic transmission fluid (except
6R80 and TorqShift威 transmissions)
Replace front wheel bearing grease/grease seals if
non-sealed bearings are used (2WD vehicles)
Every 50,000 miles
(80,000 km)
Change manual transmission fluid
Change rear axle fluid (E-450 and F-450/550
only)
Every 60,000 miles
(96,000 km)
Change transfer case fluid (4WD vehicles)
*If equipped with dual rear wheels, rotate front wheels when specified,
rear wheels only if unusual wear is noted
Scheduled Maintenance
369
2012 Navigator (nav)
Owners Guide, 1st Printing
USA (fus)
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