25-2302

TECHNICAL SERVICE BULLETIN
Harsh/Delayed Engagement And/Or Harsh/Delayed Shift

14 August
2025

This bulletin supersedes 24-2252. Reason for update: update the Title, Action Statement, Service Procedure and
Part List.
Model:
Ford
2020-2023 Explorer

Built on or before 15-Aug-2022
Transmission: 10R80 MHT (does not apply to 10R80)

2021-2023 F-150

Built on or before 15-Aug-2022
Transmission: 10R80 MHT (does not apply to 10R80)

Lincoln
2020-2023 Aviator

Built on or before 15-Aug-2022
Transmission: 10R80 MHT (does not apply to 10R80)

Markets: North American markets only
Issue: Some of the vehicles listed in the Model statement above may exhibit at least one of the following conditions:
• Harsh engagement
• Delayed engagement
• Harsh shift
• Delayed shift
• Illuminated MIL with DTCs P0751, P0752, P0756, P0757, P0761, P0762, P0766, P0767, P0771,
P0772, P2700, P2701, P2702, P2703, P2704, P2705, P2707, P2708, P0729, P0731, P0732, P0733,
P0734, P0735, P0736, P076F, P07D9, P07F6 and/or P07F7 stored in the PCM
This may be due to axial movement of the CDF clutch cylinder sleeve causing hydraulic circuit leaks.
NOTE: If internal transmission service is required to address a concern detected with the CDF clutch
cylinder following this article, technicians should carefully inspect and replace other transmission
components and flush transmission fluid cooler only as necessary as needed to ensure proper function. Add
a new line to the repair order to document any additional repairs needed. M-time can be claimed on the
additional repair line to cover labor. Refer to Warranty and Policy Manual for additional information. A
thorough understanding of transmission description and operation will assist the technician with proper
diagnosis, inspection, and successful repair of the customer concern.
Action: For vehicles that meet all of the criteria in the Issue and Model statements, follow the Service Procedure to
reprogram the transmission strategy download, reprogram the PCM software, perform an Accelerated Main Control
Break-In routine, overhaul the main control valve body and/or replace the CDF clutch cylinder (7H351) and the clutch
and planetary container cylinder (7B177) if instructed.
Parts - Main Control Overhaul - All Vehicles
Service Part
Number

Claim
Quantity

Package Order
Quantity

Number in
Package

Description

W712658-S439

2

1

4

Solenoid Retaining Plate Bolt

HL3Z-7G007-A

6

6

1

Solenoid Retaining Clips

XT-12-QULV

As Needed

As Needed

Motorcraft® MERCON® ULV Automatic
Transmission Fluid

Parts - Main Control Overhaul - Parts To Inspect And Replace Only If Necessary - All Vehicles
Service Part
Number

Claim Quantity

Package Order
Quantity

Number in
Package

Description

L1MZ-7F396-A Only If Necessary (1 Only If Necessary (1
Possible)
Possible)

1

L1MZ-7N265-A Only If Necessary (2 Only If Necessary (2
Possible)
Possible)

1

BL8Z-7G199-A Only If Necessary (2 Only If Necessary (2
Possible)
Possible)

1

L1MZ-7A098-B Only If Necessary (1 Only If Necessary (1
Possible)
Possible)

1

L1MZ-7J135-A

Only If Necessary (1 Only If Necessary (1
Possible)
Possible)

1

7T4Z-7Z302-A

Only If Necessary (1 Only If Necessary (1
Possible)
Possible)

1

HL3Z-7Z490-E

Only If Necessary (1 Only If Necessary (1
Possible)
Possible)

1

ML3Z-7Z490-C Only If Necessary (1 Only If Necessary (1
Possible)
Possible)

1

L1MZ-7Z490-N Only If Necessary (1 Only If Necessary (1
Possible)
Possible)

1

Separator Plate (Aviator, Explorer
With Electronic Shift)

L1MZ-7Z490-P Only If Necessary (1 Only If Necessary (1
Possible)
Possible)

1

Separator Plate (Explorer Without
Electronic Shift)

Fluid Pan Gasket
Fluid Pan To Case Seals
Hybrid Drive Unit Feed Tube Seals
Fluid Filter
Auxiliary Pump Seal
Transmission Fluid Filter Seal
Channel Plate
Separator Plate (F-150)

Parts - 10R80 MHT CDF Cylinder Replacement
Service Part
Number

Claim
Quantity

Package Order
Quantity

Number in
Package

Description

HL3Z-7G091-F

5

5

1

Input Shaft Seals (F2)

HL3Z-7B399-C

4

4

1

Sun Gear No. 3 Shaft Seals (F7)

HL3Z-7C099-A

1

1

1

C Clutch Balance Dam Inner Seal

HL3Z-7A548-B

2

2

1

C Clutch Balance Dam And Piston
Outer Seal

HL3Z-7D404-A

2

2

1

C And D Clutch Piston Inner Seals

HL3Z-7A262-C

1

1

1

D Clutch Balance Dam

HL3Z-7D403-A

1

1

1

D Clutch Piston Outer Seal

HL3Z-7A548-G

2

2

1

F Clutch Balance Dam And Piston
Outer Seal

HL3Z-7A548-A

2

2

1

F Clutch Balance Dam And Piston
Inner Seal

HL3Z-7G091-G

5

5

1

Input Shaft To Sun Gear No. 3 Shaft
Seals (F8)

HL3Z-7G091-C

1

1

1

Input Shaft Seal (F9)

JL3Z-7H351-B

1

1

1

CDF Cylinder (Explorer/Aviator)

ML3Z-7H351-B

1

1

1

CDF Cylinder (F-150)

PC3Z-7B177-A

1

1

1

Clutch And Planetary Container
Cylinder

Parts - 10R80 MHT CDF Cylinder Replacement - Parts To Inspect And Replace Only If Necessary
Service Part
Number
ML3Z-7A191-A

Claim Quantity
Only If Necessary (1
Possible)

Package Order
Quantity
Only If Necessary (1
Possible)

Number in
Package
1

Description
Hybrid Drive Unit Gasket

HL3Z-7B066-AB

Only If Necessary (1
Possible)

Only If Necessary (1
Possible)

1

HL3Z-7B164-E

Only If Necessary (3
Possible)

Only If Necessary (3
Possible)

1

HL3Z-7F220-A

Only If Necessary (2
Possible)

Only If Necessary (2
Possible)

1

HL3Z-7B442-F

Only If Necessary (5
Possible)

Only If Necessary (5
Possible)

1

HL3Z-7B164-A

Only If Necessary (5
Possible)

Only If Necessary (5
Possible)

1

ML3Z-7H095-A

Only If Necessary (5
Possible)

Only If Necessary (5
Possible)

1

ML3Z-7B477-A

Only If Necessary (1
Possible)

Only If Necessary (1
Possible)

1

HL3Z-7B442-D

Only If Necessary (6
Possible)

Only If Necessary (6
Possible)

1

HL3Z-7B164-C

Only If Necessary (6
Possible)

Only If Necessary (6
Possible)

1

ML3Z-7B164-A

Only If Necessary (6
Possible)

Only If Necessary (6
Possible)

1

HL3Z-7B066-E

Only If Necessary (1
Possible)

Only If Necessary (1
Possible)

1

HL3Z-7B164-G

Only If Necessary (4
Possible)

Only If Necessary (4
Possible)

1

HL3Z-7B164-D

Only If Necessary (4
Possible)

Only If Necessary (4
Possible)

1

HL3Z-7B066-A

Only If Necessary (1
Possible)

Only If Necessary (1
Possible)

1

A Pressure Plate
A Clutch Friction Plates
A Clutch Steel Plates
C Clutch Steel Plates
C Clutch Friction Plates
C Clutch Friction Plates (F-150)
C Clutch Pressure Plate
D Clutch Steel Plates
D Clutch Friction Plates
(Explorer/Aviator)
D Clutch Friction Plates (F-150)
D Clutch Pressure Plate (F150)
F Clutch Steel Plates
F Clutch Friction Plates
F Clutch Pressure Plate

Parts - 10R80 MHT CDF Cylinder Replacement - Select One Of The Following If Needed
Service Part
Number

Claim
Quantity

Package Order
Quantity

Number in
Package

Description

HL3Z-7B066-AA

1

1

1

A Clutch Apply Plate 4.1 - 4.3 mm
Selective

HL3Z-7B066-Z

1

1

1

A Clutch Apply Plate 4.4 - 4.6 mm
Selective

HL3Z-7B066-Y

1

1

1

A Clutch Apply Plate 4.7 - 4.9 mm
Selective

HL3Z-7B066-X

1

1

1

A Clutch Apply Plate 5.0 - 5.2 mm
Selective

HL3Z-7B066-W

1