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SPECIAL OPERATING CONDITIONS
If you operate your Ford/Lincoln/Mercury vehicle primarily in one of the
more demanding Special Operating Conditions listed below, you will
need to have some items maintained more frequently. If you only
occasionally operate your vehicle under these conditions, it is not
necessary to perform the additional maintenance. For specific
recommendations, see your Ford or Lincoln Mercury dealership service
advisor or technician.
Towing a trailer or using a camper or car-top carrier
Inspect frequently, service as
required
– Inspect and lubricate U-joints
– See axle maintenance items under
Exceptions
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 30,000 miles (48,000 km) – Change automatic transmission fluid (except 6R80 and
TorqShiftா transmissions)
– Replace front wheel bearing grease/grease seals if
non-sealed bearings are used (2WD vehicles)
Every 60,000 miles (96,000 km) – Change manual transmission fluid
– Change transfer case fluid (4WD vehicles)
Scheduled Maintenance Guide
355
2011 Navigator (nav)
Owners Guide, 1st Printing
USA (fus)