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TECHNICAL SERVICE BULLETIN
4WD - Intermittent Grinding Noise While Driving

19-2252
22 August 2019

This bulletin supersedes 18-2273. Reason for update: New Part/Procedure For Same Condition
Model:
Ford
2013-2018 Expedition
2013-2018 F-150
Lincoln
2013-2018 Navigator
Summary
This article supersedes TSB 18-2273 to update the Parts List and Service Procedure.
Issue: Some 2013-2018 F-150/Expedition/Navigator vehicles equipped with four wheel drive (4WD) may
exhibit an intermittent grinding noise while driving in two wheel drive (2WD) mode most commonly on
acceleration. This may be due to a loss of vacuum to the integrated wheel end (IWE) actuators and/or
wear of the IWE components. To correct the condition, follow the Service Procedure steps to replace the
worn vacuum and/or IWE components.
Action: Follow the service procedure steps to correct the condition on vehicles that meet the following
criteria:
• 2013-2018 F-150/Expedition/Navigator
• Equipped with 4WD
• Customer concern of intermittent grinding noise in 2WD mode.
Parts
Part Number Description

Quantity

W714743S439

Caliper Anchor Plate Bolt (2013-2014 F-150, 2013-2017 Expedition/Navigator)

W720613S439

Caliper Anchor Plate Bolt (2015-2018 F-150, 2018 Expedition/Navigator)

N802827S100

Front Half Shaft Nut (2013-2016 F-150 Built On Or Before 2-Aug-2016)

N802827S100A

Front Half Shaft Nut (2016-2018 F-150 Built On Or After 3-Aug-2016, 20152018 Expedition/Navigator Built On Or After 14-Apr-2015)

1

N802827S441

Front Half Shaft Nut (2013-2015 Expedition/Navigator Built On Or Before 14Apr-2015)

1

W520215S441

Tie Rod End Nut/Upper Ball Joint Nut (2013-2014 F-150, 2013-2017
Expedition/Navigator)

1

W520215S440

Tie Rod End Nut (2015-2018 F-150, 2018 Expedition/Navigator)

W520214S440

Upper Ball Joint Nut (2015-2018 F-150, 2018 Expedition/Navigator)

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1104

Front Hub Bearing - Refer To The Parts Catalog For The VIN Specific
Application

2

7L1Z3C247-A

IWE Actuator (2013-2015 F-150 Built On Or Before 11-Oct-2015, 2013-2015
Expedition/Navigator)

2

HL1Z3C247-A

IWE Actuator (2015-2018 F-150 Built On Or After 12-Oct-2015, 2016-2018
Expedition/Navigator)

2

W706890S439

2

Front Hub Bearing Bolts

HL1Z3C247-B

IWE Clutch Ring Kit

BL3Z7A785-A

Vacuum Lines (2013-2014 F-150)

BL3Z7A785-B

Vacuum Lines (2013-2014 Raptor)

FL3Z7A785-A

Vacuum Lines (2015-2018 F-150)

HL3Z7A785-A

Vacuum Lines (2017-2018 Raptor)

AL1Z7A785-C

Vacuum Lines (2013-2014 Expedition/Navigator)

FL1Z7A785-A

Vacuum Lines (2015-2017 Expedition/Navigator)

JL3Z7A785-A

Vacuum Lines (2018 Expedition/Navigator)

HL3Z3C125-A

Vacuum Hose to IWE (2017-2018 Raptor)

FL3Z3C125-A

Vacuum Hose to IWE (2015-2018 F-150, 2018 Expedition/Navigator)

BL3Z3A788-A

Check Valve (2013-2014 F-150)

FL3Z3A788-B

Check Valve (2015-2018 F-150, 2018 Expedition/Navigator)

AL3Z3A788-A

Check Vavle (2013-2017 Expedition/Navigator)

XG-1-E1

Motorcraft® Premium Long-Life Grease

2
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Warranty Status: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage Warranty/ESP
coverage limits/policies/prior approvals are not altered by a TSB. Warranty/ESP coverage limits are
determined by the identified causal part and verified using the OASIS part coverage tool.
Labor Times
Description

Operation
Time
No.

2013-2018 F-150, Expedition/Navigator 4X4: Inspect, Replace Check Valve, Apply
Vacuum To Both IWEs (Pass) Road Test (Pass) (Do Not Use With Any Other Labor
Operations)

192252A

0.8
Hrs.

2013-2018 F-150, Expedition/Navigator 4X4: Inspect, Replace Check Valve, Apply
Vacuum To Both IWEs (Fail) Apply Vacuum Directly To Each IWE (One Fail)
Remove One IWE, Inspect Wheel Bearing Splines (Pass) Replace One (1) IWEs

192252B

1.1
Hrs.

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(Can Be Claimed With Operations K, L And M) (Do Not Use With Any Other Labor
Operations Outside Of This Article)
2013-2018 F-150, Expedition/Navigator 4X4: Inspect, Replace Check Valve, Apply
Vacuum To Both IWEs (Fail) Apply Vacuum Directly To Each IWE (Both Fail)
Remove Both IWEs, Inspect Wheel Bearing Splines (Both Pass) Replace Both (2)
IWEs (Can Be Claimed With Operations K, L And M) (Do Not Use With Any Other
Labor Operations Outside Of This Article)

192252C

1.8
Hrs.

2013-2018 F-150, Expedition/Navigator 4X4: Inspect, Replace Check Valve, Apply
Vacuum To Both IWEs (Fail) Apply Vacuum Directly To Each IWE (Both fail)
Remove IWEs, Inspect Wheel Bearing Splines (One Fail) Replace One (1) Wheel
Bearing And One (1) IWE (Can Be Claimed With Operations K, L And M) (Do Not
Use With Any Other Labor Operations Outside Of This Article)

192252D

1.9
Hrs.

2013-2018 F-150, Expedition/Navigator 4X4: Inspect, Replace Check Valve, Apply
Vacuum To Both IWEs (Fail) Apply Vacuum Directly To Each IWE (Both fail)
Remove IWEs, Inspect Wheel Bearing Splines (Both Fail) Replace Both (2) Wheel
Bearings And Both (2) IWEs (Can Be Claimed With Operations K, L And M) (Do Not
Use With Any Other Labor Operations Outside Of This Article)

192252E

2.1
Hrs.

2013-2018 F-150, Expedition/Navigator 4X4: Inspect, Replace Check Valve, Apply
Vacuum To Both IWEs (Both Pass) Apply Vacuum Directly To Each IWE, Road test
(Fail One Side) Remove IWE, Inspect Wheel Bearing Splines (Pass) Replace One
(1) IWE Clutch Ring (Can Be Claimed With Operations K, L And M) (Do Not Use
With Any Other Labor Operations Outside Of This Article)

192252F

1.6
Hrs.

2013-2018 F-150, Expedition/Navigator 4X4: Inspect, Replace Check Valve, Apply
Vacuum To Both IWEs (Both Pass) Apply Vacuum Directly To Each IWE, Road test
(Fail Both Sides) Remove Both IWEs, Inspect Wheel Bearing Splines (Pass)
Replace Both (2) IWE Clutch Rings (Can Be Claimed With Operations K, L And M)
(Do Not Use With Any Other Labor Operations Outside Of This Article)

192252G

2.3
Hrs.

2013-2018 F-150, Expedition/Navigator 4X4: Inspect, Replace Check Valve, Apply
Vacuum To Both (2) IWEs (Both Pass) Apply Vacuum Directly To Each IWE, Road
Test (fail One Side) Remove IWE, Inspect Wheel Bearing Splines (Fail One Side)
Replace One (1) Wheel Bearing And One (1) IWE Clutch Ring (Can Be Claimed
With Operations K, L And M) (Do Not Use With Any Other Labor Operations Outside
Of This Article)

192252H

1.8
Hrs.

2013-2018 F-150, Expedition/Navigator 4X4: Inspect, Replace Check Valve, Apply
Vacuum To Both (2) IWEs (Both Pass) Apply Vacuum Directly To Each IWE, Road
test (Fails Both Sides) Remove Both IWEs, Inspect Wheel Bearing Splines (Fail
Both Sides) Replace Both (2) Wheel Bearing And Both (2) IWE Clutch Rings (Can
Be Claimed With Operations K, L And M) (Do Not Use With Any Other Labor
Operations Outside Of This Article)

192252J

2.6
Hrs.

2013-2018 F-150, Expedition/Navigator 4X4: Additional Time Use Scan Tool To
Active Solenoid And Measure Vacuum At Both IWEs (Can Be Claimed With
Operations A-J)

192252K

0.3
Hrs.

2013-2018 F-150, Expedition/Navigator 4X4: Additional Time To Be Used When
Vacuum Harness Replacement Is Necessary (Can Be Claimed With Operations A-J)

192252L

0.5
Hrs.

2017-2018 F-150, Expedition/Navigator 4X4: Additional Time To Be Used When
TCCM Reprogramming Is Necessary (Can Be Claimed With Operations A-J)

192252M

0.2
Hrs.

Repair/Claim Coding
Causal Part:

3C247

Condition Code: D4

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Service Procedure
1. Inspect the IWE vacuum hoses. Refer to Workshop Manual (WSM), Section 308-07A. Are there any
disconnected or damaged vacuum hoses? (Figure 1)
(1). Yes - this article does not apply. Refer to WSM, Section 308-07A for normal diagnostics.
(2). No – proceed to Step 2.
Figure 1

2. Replace the vacuum check valve located near the vacuum reservoir. Refer to WSM, Section 308-07A.
3. Disconnect the vacuum line to the IWEs at the vacuum solenoid.
4. Connect a hand vacuum pump to the IWE vacuum supply line and apply 508 mm-Hg (20 in-Hg) of
vacuum. Does the vacuum drop more than 12.5 mm-Hg (0.5 in-Hg) per minute? (Figure 2)
(1). Yes - proceed to Step 5.
(2). No - connect the IWE vacuum supply line to the solenoid and proceed to Step 9.
Figure 2

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5. Using a hand vacuum pump, apply 508 mm-Hg (20 in-Hg) of vacuum to each IWE, one at a time, and
monitor the vacuum gauge. Does the vacuum drop more than 12 mm-Hg (0.5 in-Hg) per minute?
(Figure 3)
(1). Yes - proceed to Step 7.
(2). No – proceed to Step 6.
Figure 3

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6. Replace the vacuum lines between the solenoid and IWEs. Refer to the WSM, Section 308-07A.
Proceed to Step 11.
7. Remove the IWE assembly from the affected wheel. Refer to WSM, Section 308-07A.
8. Inspect the wheel bearing splines for damage or excessive wear. Is wheel bearing spline damage or
excessive wear present?
(1). Yes - replace the IWE assembly and wheel bearing. Refer to WSM, Section 308-07A and 204-01B.
Proceed to Step 11.
(2). No - replace the IWE assembly. Refer to WSM, Section 308-07A. Proceed to Step 11.
9. Test the IWE vacuum supply lines.
(1). Disconnect the vacuum supply line at the left or right IWE and connect a vacuum gauge to the
supply line as shown in Figure 4.
(2). Start the engine and allow it to idle for 5 minutes to build vacuum.
(3). Connect the appropriate Ford scan tool and enter transfer case control module (TCCM) data
logger.
(4). Active command the vacuum solenoid.
• IDS Vehicles: Command IWE_OS # to No.

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• FDRS Vehicles: Command IWE_OUT_ENGAGED = No (False)

(5). Repeat this test on the opposite IWE vacuum supply line.
Figure 4

10. Is the vacuum at both left and right supply lines greater than 254 mm-Hg (10 in-Hg)?
(1). Yes - proceed to step 11.
(2). No - replace the vacuum lines between the solenoid and IWEs. Refer to the WSM, Section 30807A. Proceed to Step 11.
11. Is the vehicle a 2017 or 2018 built on or before 17-Sept-2018?
(1). Yes - reprogram the TCCM using the latest version of the appropriate Ford scan tool.
• Note: The new TCCM calibration changes IWE operation at start up. When ambient temperature is above 0°C
(32°F) the IWEs stay engaged regardless of a 4WD mode change for approximately 0.8 km (0.5 miles).
Engagement only occurs once per key cycle and is not reset when shifting between PARK and DRIVE. The
TCCM uses this strategy to delay vacuum use until vacuum-intensive engine startup has completed and
sufficient vacuum is available to fully disengage IWEs.

(2). No – proceed to Step 12.

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12. Road test the vehicle for noise by performing heavy accelerations in 2WD. Engage the 4WD system to
verify proper engagement/disengagement quality. Is a grinding noise present in 2WD mode that is not
present in 4WD mode?
(1). Yes – proceed to Step 13.
(2). No – repair is complete.
13. Remove the IWE assembly from the affected wheel. Refer to WSM, Section 308-07A.
14. Inspect the wheel bearing splines. Is wheel bearing spline damage present?
(1). Yes - replace the IWE clutch ring and wheel bearing. Refer to WSM, Section 308-07A and 20401B.
(2). No - replace the IWE clutch ring. Refer to WSM, Section 308-07A.

© 2019 Ford Motor Company
All rights reserved.
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge,
tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or
provides information that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do
not assume that a condition described affects your car or truck. Contact a Ford or Lincoln dealership to determine whether the
Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended
Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was
current at the time of printing. Ford Motor Company reserves the right to supersede this information with updates. The most recent
information is available through Ford Motor Company's on-line technical resources.

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