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

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

Preliminary Inspection

Visually inspect the CV joints, housing, boots, and clamps for obvious signs of mechanical 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 Symptom Chart: NVH.

Symptom Chart(s)

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

Symptom Chart

Condition	Possible Sources	Actions
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 as necessary. REFER to: Rear Halfshaft (205-05 Rear 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 hub nuts. REFER to: Wheel Bearing and Wheel Hub (204-02 Rear Suspension, Removal and Installation).
Driveline clunk — occurs as the vehicle starts to move forward following a stop	Loose hub nut	CHECK the torque on the hub nut. REPLACE the hub nut if the torque is not at specification. REFER to: Rear Halfshaft (205-05 Rear Drive Halfshafts, Removal and Installation). REFER to: Wheel Bearing and Wheel Hub (204-02 Rear Suspension, Removal and Installation).
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: Rear Halfshaft (205-05 Rear Drive Halfshafts, Removal and Installation).
Driveline vibration - occurs at cruising speeds	Binding or damaged Constant Velocity CV joint	CHECK the outer CV joint for correct seating into the hub. REPAIR as necessary. REFER to: Rear Halfshaft (205-05 Rear Drive Halfshafts, Removal and Installation). REFER to: Wheel Bearing and Wheel Hub (204-02 Rear Suspension, Removal and Installation).

Differential Seals

NOTICE: When installing shafts, do not allow splines to contact seals during installation or damage to the seals may occur.

Halfshaft seals are susceptible to the same types of damage as drive pinion seals if incorrectly installed. The seal bore must be clean and the lip handled carefully to avoid cutting or tearing it. The seal journal surface must be free of nicks, gouges and rough surface texture.

For information on differential seals,
REFER to: Rear Halfshaft Seal (205-02 Rear Drive Axle/Differential, Removal and Installation).

Rear Drive Halfshafts

Removal and Installation - Rear Halfshaft

Removal NOTICE: Never pick up or hold the halfshaft by only the inner or outer CV joint. Damage to the CV joint will occur. NOTICE: Never use a hammer to remove or install the halfshafts...

Other information:

Lincoln Aviator 2020-2025 Service Manual: Diagnosis and Testing - Pedestrian Alert System

Diagnostic Trouble Code (DTC) Chart 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). Diagnostic Trouble Code Chart Module DTC Description Action PACM B1A01:01 Speaker #1: General Electrical Failure GO to Pinpoint Test C PACM B1A01:11 Speaker #1: Circuit Short To Ground GO to Pinpoint Test C PACM B1A01:12 Speaker #1: Circuit Short To Battery GO to Pinpoint Test D PACM B1A01:13 Speaker #1: Circuit Open GO to Pinpoint Test D PACM B1A02:01 Speaker #2: General Electrical Failure GO to Pinpoint Test C PACM B1A02:11 Speaker #2: Circuit Short To Ground GO to Pinpoint Test C PACM B1A02:12 Speaker #2: Circuit Short To Battery GO to Pinpoint Test D PACM B1A02:13 Speaker #2: Circuit Open GO to Pinpoint Test D PACM U0100:00 Lost Communication With ECM/PCM "A": No Sub Type Information GO to Pinpoint Test E PACM U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to Pinpoint Test F PACM U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information GO to Pinpoint Test G PACM U201A:51 Control Module Main Calibration Data: Not Programmed GO to Pinpoint Test H PACM U2101:00 Control Module Configuration Incompatible: No Sub Type Information GO to Pinpoint Test H PACM U3000:41 Control Module: General Checksum Failure GO to Pinpoint Test I PACM U3000:42 Control Module: General Memory Failure GO to Pinpoint Test I PACM U3000:96 Control Module: Component Internal Failure GO to Pinpoint Test I PACM U3003:16 Battery Voltage: Circuit Voltage Below Threshold GO to Pinpoint Test J PACM U3003:17 Battery Voltage: Circuit Voltage Above Threshold GO to Pinpoint Test K Symptom Chart Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices...

Lincoln Aviator 2020-2025 Service Manual: General Procedures - Tire Pressure Monitoring System (TPMS) Sensor Activation

Special Tool(s) / General Equipment 204-D081A (204-D081) Tire Pressure Monitor (TPMS) Activation NOTE: The tire pressure sensors will go into a "sleep mode" when a vehicle is stationary to conserve battery power. The sensors do not transmit information while in sleep mode...

Fastening the Seatbelts

The front outboard and rear safety restraints in the vehicle are combination lap and shoulder belts.

Insert the belt tongue into the proper buckle (the buckle closest to the direction the tongue is coming from) until you hear a snap and feel it latch. Make sure that you securely fasten the tongue in the buckle.

Lincoln Aviator. Fastening the Seatbelts

To unfasten, press the release button and remove the tongue from the buckle.