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 tires for 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 15,000 miles (24,000 km)
– Replace fuel filter (Ranger)
Every 30,000 miles (48,000 km)
– Change automatic transmission fluid (except 6R80 and
TorqShift
姞
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 lubricant (E-450 and F-450/550
only)
Every 60,000 miles (96,000 km)
– Change transfer case fluid (4WD vehicles)
Scheduled Maintenance Guide
357
2011 Navigator
(nav)
Owners Guide, 1st Printing
USA
(fus)
