Lincoln Aviator 2020-2025 Service Manual / Chassis / Driveline / Front Drive Halfshafts / Diagnosis and Testing - Front Drive Halfshafts

Lincoln Aviator: Front Drive Halfshafts / Diagnosis and Testing - Front Drive Halfshafts

Principles of Operation

Inspection and Verification

Verify the customer concern.

Visually inspect for obvious signs of mechanical or electrical damage.

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step

If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart: NVH

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Symptom Chart NVH

Condition	Possible Sources	Actions
Axle howling or whine – front axle	Damaged or worn wheel hub bearings	CHECK for abnormal wheel hub bearing play or roughness. REFER to: Front Wheel Bearing and Wheel Hub (204-01A Front Suspension - RWD, Removal and Installation).
Driveline clunk - loud clunk when shifting from REVERSE to DRIVE	Damaged or worn Constant Velocity (CV) joints	INSPECT the Constant Velocity (CV) joints for wear or damage. INSTALL a new halfshaft or driveshaft as necessary. REFER to: Halfshaft (205-04 Front Drive Halfshafts, Removal and Installation).
	Loose hub nut	CHECK the torque on the hub nut. REPLACE the hub nut if the torque is not at specification. For front hub nuts. REFER to: Front Wheel Bearing and Wheel Hub (204-01A Front Suspension - RWD, Removal and Installation). REFER to: Halfshaft (205-04 Front Drive Halfshafts, Removal and Installation).
Driveline clunk — occurs during acceleration or from cruise to coast/deceleration	Damaged or worn Constant Velocity (CV) joints	INSPECT the inner Constant Velocity (CV) joint and boot. INSTALL a new halfshaft as necessary. REFER to: Halfshaft (205-04 Front Drive Halfshafts, Removal and Installation).
	Loose hub nut	CHECK the torque on the hub nut. REPLACE the hub nut if the torque is not at specification. REFER to: Halfshaft (205-04 Front Drive Halfshafts, Removal and Installation). REFER to: Front Wheel Bearing and Wheel Hub (204-01A Front Suspension - RWD, Removal and Installation).
Driveline clunk — occurs as the vehicle starts to move forward following a stop	Loose hub nut Damaged or worn CV joints	CHECK the torque on the hub nut. REPLACE the hub nut if the torque is not at specification. REFER to: Halfshaft (205-04 Front Drive Halfshafts, Removal and Installation).
Clicking, popping or grinding - occurs while the vehicle is turning	Inadequate or contaminated lubrication in the Constant Velocity (CV) joints	CHECK the Constant Velocity (CV) boots and joints for wear or damage. INSTALL new components as necessary. REFER to: Halfshaft (205-04 Front Drive Halfshafts, Removal and Installation).
	Another component contacting the halfshaft	CHECK the halfshafts and the area around the halfshafts. REPAIR as necessary.
Grunting — normally associated with a shudder experienced during acceleration from a complete stop	Halfshaft Constant Velocity (CV) joint binding	CHECK the outer Constant Velocity (CV) joint for correct seating into the hub. REPAIR as necessary. REFER to: Halfshaft (205-04 Front Drive Halfshafts, Removal and Installation).

Front Drive Halfshafts

Removal and Installation - Halfshaft

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Locking and Unlocking the Doors from Inside

Lincoln Aviator. Locking and Unlocking the Doors from Inside

Unlock. Lock.

Locking the Doors

Press the lock switch on the door interior trim panel. The doors can no longer be released using the exterior door handle switches and the luggage compartment locks.