life. These lubricants are not to be checked or changed unless a leak is
suspected, service is required 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. Non-synthetic rear axle
lubricants should be replaced every 3,000 miles or 3 months, whichever
occurs first, during extended trailer tow operation above 21 Celsius (70
degrees Fahrenheit) ambient and wide open throttle for extended
periods above 45 mph. The 3,000 mile lube 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 four ounces of additive friction modifier
C8AZ-19B546-A (EST-M2C118-A) or equivalent for complete refill of
Traction-Lok rear axles. The axle lubricant should be changed anytime
an axle has been submerged in water.
F-450 and F-550 axle maintenance
Replace rear axle lubricant every 100,000 miles under normal driving
conditions on all F-450 and F-550 commercial applications. For F-450
and F-550 trucks operated at or near maximum Gross Vehicle Weights,
the rear axle lubricant should be replaced every 50,000 miles. In
addition, this 50,000 mile schedule should be observed when the vehicles
are operated under the Special Operating Conditions.
SPECIAL OPERATING CONDITIONS
Towing a trailer or using a camper or car-top carrier
Every 5,000 miles or 6 months:Change engine oil and replace filter
Every 15,000 miles:Inspect and lubricate 4x2 ball joints and steering
idler arms
Every 30,000 miles:Lubricate 4x4 hub needle bearings
Every 60,000 miles:Change transfer case fluid
As required:Change manual transmission fluid
Extensive idling and/or low-speed driving for long distances as in
heavy commercial use such as delivery, taxi, patrol or livery
Every 5,000 miles, 6 months or 200 hours (whichever comes
first):Change engine oil and replace filter
Every 5,000 miles:Inspect brake system. Inspect and lubricate 4x2 ball
joints and steering idler arms
30,000 miles and 90,000 miles:Lubricate 4x2 wheel bearings. Replace
wheel bearing grease seal.
General Owner’s Information
54
Every 60,000 miles:Change transfer case fluid
As required:Replace cabin air filter, if equipped
Operating in dusty conditions such as unpaved or dusty roads
Every 5,000 miles or 6 months:Change engine oil and replace filter
Every 5,000 miles:Check air filter minder (replace air filter as required
or when air filter minder indicates)
Every 15,000 miles:Inspect and lubricate 4x2 ball joints and steering
idler arms
General Owner’s Information
55
