NHTSA ID Number: 11020999
Manufacturer Communication Number: TSB 25-2351
TSB/Document Date: 2025-07-30
Summary
This article supersedes TSB 24-2386 to update the Service Procedure and Part List. Some of the vehicles listed in the Model statement above may exhibit all of the following conditions: - Shudder chatter condition, most noticeable at low speeds turning - No diagnostic trouble codes DTCs present Note: Three (3) new Essential Special Service Tools (ESSTs) are required to service the internal clutch pack on vehicles equipped with a single active torque rear drive unit (RDU) only. These ESSTs are expected to ship to all dealers (US, Canada, Puerto Rico and Mexico) in September 2025. ESST packages were shipped to 100 selected dealers in the US and Canada in May 2025, based on RDU part sales activity. The RDU Internal Clutch Kit and Adhesive Sealant are currently under restricted ordering to ensure ample supply of parts are available to dealers with the ESSTs. All parts are expected to be available for open order by Q4 2025, when the ESSTs are planned to arrive at all dealers. Note: For dealers with the ESSTs and a vehicle in the service department that requires a repair using the new RDU Internal Clutch
7/29/25, 6:19 PM
Ford
Motor Company
TECHNICAL SERVICE BULLETIN
Chatter/Shudder During Low Speed Turning Events
25-2351
25 July 2025
This bulletin supersedes 24-2386. Reason for update: update the Service Procedure and Part List.
Model:
Ford
2021-2024 Bronco Sport
2019-2024 Edge
2020-2024 Escape
2022-2024 Maverick
Lincoln
2020-2024 Corsair
2019-2023 Nautilus
Markets: North American markets only
Issue: Some of the vehicles listed in the Model statement above may exhibit all of the following conditions:
• Shudder chatter condition, most noticeable at low speeds turning
• No diagnostic trouble codes DTCs present
NOTE: Three (3) new Essential Special Service Tools (ESSTs) are required to service the internal clutch pack
on vehicles equipped with a single active torque RDU only. These ESSTs are expected to ship to all dealers
(US, Canada, Puerto Rico and Mexico) in September 2025. ESST packages were shipped to 100 selected
dealers in the US and Canada in May 2025, based on RDU part sales activity. The RDU Internal Clutch Kit and
Adhesive Sealant are currently under restricted ordering to ensure ample supply of parts are available to
dealers with the ESSTs. All parts are expected to be available for open order by Q4 2025, when the ESSTs are
planned to arrive at all dealers.
NOTE: For dealers with the ESSTs and a vehicle in the service department that requires a repair using the
new RDU Internal Clutch Kit, submit a VIN-specific No FSA General Contact via the Special Service Support
Center (SSSC) Web Contact Site. Type part numbers K2GZ-7C108-A and SU7Z-19B508-A in the comments
and attach a copy of the repair order documenting the customer complaint.
Action: For vehicles that meet all the criteria in the Issue and Model statements, follow the Service Procedure to
repair the vehicle based on ESST availability and vehicle line parameters.
Parts
Service Part
Number
Claim
Quantity
Package
Order
Quantity
Number in
Package
K2GZ-7C108A
1
1
1
LX6Z-5A215D
1
1
1
W720472S439
4
1
4
W720080S439
3
1
4
LX6Z-4B496A
1
1
1
https://www.fordtechservice.dealerconnection.com
Description
RDU Clutch Kit
Exhaust Clamp
Caliper Bolt (Maverick, Bronco Sport, Escape only)
RDU Mount Bolt
Driveshaft Bolts
1/15
7/29/25, 6:19 PM
Ford Motor Company
W719466S439
8
2
4
NZ6Z-3B498A
2
2
1
W720473S439
4
1
4
W720079S900
2
1
4
W720678S439
8
2
4
CCPZ-3B477B
2
2
1
CV6Z-4B416D
2
2
1
K2GZ-4022-M
1
1
1
RDU Vent Hose (Bronco Sport 1.5L, Escape 1.5L/2.0L)
LX6Z-4022-C
1
1
1
RDU Vent Hose (Bronco Sport 2.0L)
K2GZ-4022-L
1
1
1
RDU Vent Hose (Corsair)
LX6Z-4022-H
1
1
1
RDU Vent Hose (Escape 2.5L FHEV)
W718014S450
1
1
4
6C2Z-4N282AA
1
1
1
K2GZ-4000AW
1
1
1
K2GZ-4000AU
1
1
1
SU7Z19B508-A
1
1
1
XY-75W-QL
As Needed
As Needed
1
Motorcraft® SAE 75W-85 Premium Synthetic Hypoid
Gear Lubricant
PM-4-A
As Needed
As Needed
1
Motorcraft® Metal Brake Parts Cleaner (Compliant With
Low Volatile Organic Compound Requirements As
Required In Some USA States)
PM-4-B
As Needed
As Needed
1
Motorcraft® Metal Brake Parts Cleaner (Not Compliant
With Volatile Organic Compound Requirements)
CPM-4-A
As Needed
As Needed
1
Motorcraft® Metal Brake Parts Cleaner (Not Compliant
With Volatile Organic Compound Requirements)
XL-2
As Needed
As Needed
1
Motorcraft® High Temperature Nickel Anti-Seize
Lubricant
TA-2-B
As Needed
As Needed
1
Motorcraft® Seam Sealer
Wheel Hub Bolt (Maverick, Bronco Sport, Escape only)
Axle Cir-clip Retainer
Caliper Bolt (Corsair)
RDU Bolt (Corsair)
Hub Bolt (Corsair)
Axle Nut (Corsair)
Axle Seal
Stud Rivet
Drain Plug
Axle Assembly (Maverick, Bronco Sport, Escape only)
Axle Assembly (Corsair Only)
Flange Sealant Adhesive
Service part numbers and "number in package" quantity may change after publication, thus also affecting the
"package order quantity". Refer to the parts catalog for the latest information.
Claim Quantity refers to the total number of individual pieces required to repair the vehicle.
Package Order Quantity refers to the amount of the service part number package(s) required to repair the vehicle.
Number In Package refers to the number of individual pieces included in a service part number package.
As Needed indicates the part is necessary but amount of the part may vary and/or is not a whole number. Parts can
be billed out as non-whole numbers, including less than 1.
Special Tool(s)
https://www.fordtechservice.dealerconnection.com
2/15
7/29/25, 6:19 PM
Ford Motor Company
Clutch Friction Alignment Tool
205-1153
Idler Gear Pin Remover
205-1136
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TSB/Document ID: TSB 25-2351
Replacement Service Bulletin Number:
MFR Communication Date: 2025-07-25
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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