Lincoln Aviator: Front Drive Halfshafts / Diagnosis and Testing - Front Drive Halfshafts
Principles of Operation
Inspection and Verification
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Verify the customer concern.
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Visually inspect for obvious signs of mechanical or electrical damage.
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If an obvious cause for an observed or reported concern is
found, correct the cause (if possible) before proceeding to the next
step
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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
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Possible Sources
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Actions
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Axle howling or whine – front axle
|
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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).
|
|
-
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).
|
|
-
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
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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).
|
Special Tool(s) /
General Equipment
204-592Separator, Lower Arm Ball JointTKIT-2006C-FFMFLMTKIT-2006C-LMTKIT-2006C-ROW
Tie Rod End Remover
Tire Lever
Removal
NOTICE:
Suspension fasteners are critical parts that affect the
performance of vital components and systems...
Other information:
General Specifications
NOTE:
Measurements listed at curb load. Curb load is defined as
"full service fluids, full fuel tank(s), no passengers and no cargo".
Item
Specification
Ball Joint Deflection (All Vehicles)
Lower
0 - 0...
Special Tool(s) /
General Equipment
Resistance Spotwelding Equipment
Spherical Cutter
Grinder
Plasma Cutter
Air Body Saw
8 mm Drill Bit
MIG/MAG Welding Equipment
Spot Weld Drill Bit
Materials
Name
Specification
Metal Bonding AdhesiveTA-1, TA-1-B, 3M™ 08115, LORD Fusor® 108B
-
Seam SealerTA-2-B, 3M™ 08308, LORD Fusor® 803DTM
-
Motorcraft® Metal Surface Prep WipesZC-31-B
-
Repair
NOTE:
Weld Bonding-Squeeze Type Resistance Spot Welding (STRW) Method...