•Additional noise from the transfer caseor other drive components.
•Difficulty shifting out of a mechanicallylocked four-wheel drive mode.
Use of a dissimilar spare wheel and tireassembly can lead to impairment of thefollowing:
•Comfort and noise.
•Winter weather driving capability.
•Wet driving capability.
•Four-wheel drive capability.
Mechanical Shift Blocking
On four-wheel drive vehicles with amechanically locked four-wheel drive highmode, the transfer case distributes torqueto the front wheels by mechanicallyinterlocking the front and rear driveshaftstogether. Various external factors canaffect shifting performance of this type ofsystem including, but not limited to:
•Vehicle acceleration.
•Dissimilar tire sizes.
•Steering input.
If the system detects a mechanical shiftblockage at speed after you selecttwo-wheel drive high, the message "4x4Unable to Disengage See Manual", coulddisplay momentarily. If this messagedisplays, one or more of the followingactions can relieve the mechanical shiftblock:
•Momentary acceleration.
•Momentary braking.
•Bringing the vehicle to a stop.
•Shifting the transmission to neutral andback to drive.
•Shifting the transmission to reverseand back to drive.
•Driving the vehicle around a tight turnat a slow speed.
SELECTING A FOUR-WHEEL
DRIVE MODE - EXCLUDING:
RAPTOR
The four-wheel drive mode control is onthe instrument panel.
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Normal Maintenance Intervals
At Every Oil Change Interval as Indicated by the Instrument Cluster Display 1
Change the engine oil and filter.2
Rotate the tires, inspect for tire wear and measure the tread depth.
Perform a multi-point inspection, recommended.
Inspect the automatic transmission fluid level, if applicable with dipstick. Consult yourdealer for requirements.
Inspect the brake pads, shoes, rotors, drums, brake linings, hoses and the parking brake.
Inspect the engine coolant system strength and hoses.
Inspect the exhaust system and heat shields.
Inspect the front axle.3
Inspect the half-shaft boots.
Inspect the steering linkage, ball joints, suspension, tire-rod ends, and driveshaft.
Inspect the wheels and related components for abnormal noise, wear, looseness ordrag.
1 Do not exceed one year or 10,000 mi (16,000 km) between service intervals.2 Reset the oil change reminder after engine oil and filter changes. See Resetting theIntelligent Oil Life Monitor (page 506).3 Four-wheel drive vehicles only.
Brake Fluid Maintenance1
Change the brake fluid.2Every 3 Years
1 Perform this maintenance item every 3 years. Do not exceed the designated time forthe interval.2 Brake fluid servicing requires special equipment available at your authorized dealer.
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2023 F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202206, DOMScheduled Maintenance
