Ford F-150 Owner's Manual page 440

Scheduled Maintenance
Every 150,000 miles
(240,000 km)
1
Initial replacement at 100,000 miles (160,000 km) or 72 months; every
50,000 miles (80,000 km) or 36 months thereafter
2
Perform a follow-up inspection at 120,000 miles (192,000 km)
6.2L engine
The following section contains the "Normal Schedule". This schedule is
presented at specific mileage (kilometer) intervals with exceptions
noted.
440
2011 F-150 (f12)
Owners Guide, 3rd Printing
USA (fus)
Change automatic transmission fluid and filter
(except 5–speed TorqShift transmission) (filter
not required on 6F35, 6F50, DPS6 and AWF-21
transmissions); consult dealer for requirements
Change front axle fluid (4WD vehicles)
Change manual transmission fluid (Escape)
Change rear axle fluid (RWD vehicles)
Replace accessory drive belt(s) if not replaced
within the last 100,000 miles (160,000 km)
Replace front wheel bearings and seals if
non-sealed bearings are used (2WD vehicles)