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EXCEPTIONS
In addition, there are several exceptions to the Normal Schedule. They
are listed below:
Normal vehicle axle maintenance
❑
Rear axles and power take-off (PTO) units containing synthetic lubricant and light duty trucks equipped with Ford-design
axles are lubricated for life. These lubricants are not to be checked or changed unless a leak is suspected, service is re-
quired or the axle assembly has been submerged in water. The axle and PTO lubricant should be changed anytime the axle
and PTO have been submerged in water. During extended trailer tow operation above 70°F (21°C) ambient and wide open
throttle for extended periods above 45 mph (72 km/h), non-synthetic rear axle lubricants should be replaced every
3,000 miles (4,800 km) or 3 months, whichever occurs first. The 3,000 mile (4,800 km) lubricant change interval may
be waived if the axle was filled with 75W140 synthetic gear lubricant meeting Ford specification WSL-M2C192-A, part
number F1TZ-19580-B or equivalent. Add friction modifier XL-3 (EST-M2C118-A) or equivalent for complete refill of Traction-
Lok rear axles (refer to
Maintenance product and specifications
in the
Maintenance and Specifications
chapter for details).
The axle lubricant should be changed anytime an axle has been submerged in water.
Police/Taxi/Livery vehicle axle maintenance
❑
Replace rear axle lubricant every 100,000 miles (160,000 km). Rear axle lubricant change may be waived if the axle
was filled with 75W140 synthetic gear lubricant meeting Ford specification WSL-M2C192-A, part number FITZ-19580-B or
equivalent. Add four ounces (118 mL) of additive friction modifier XL-3 (EST-M2C118-A) or equivalent for complete refill of
Traction-Lok rear axles. The axle lubricant should be changed anytime the axle has been submerged in water.
E–450 and F–450/550 axle maintenance
❑
Replace rear axle lubricant every 100,000 miles (160,000 km) under normal driving conditions on all E–450 and
F–450/550 applications. For E–450 and F–450/550 vehicles operated at or near maximum Gross Vehicle Weights, the
rear axle lubricant should be replaced every 50,000 miles (80,000 km). In addition, this 50,000 mile (80,000 km)
schedule should be observed when the vehicles are operated under the Special Operating Conditions.
California fuel filter replacement
❑
If vehicle is registered in California, the California Air Resources Board has determined that the failure to perform this main-
tenance item will not nullify the emission warranty or limit recall liability prior to the completion of the vehicle’s useful life.
Ford Motor Company, however, urges you to have all recommended maintenance services performed at the specified inter-
vals and to record all vehicle service.
Class A Motorhome
❑
Every two years - Change brake fluid
Scheduled Maintenance Guide
361
2011 Navigator (nav)
Owners Guide, 1st Printing
USA (fus)