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

26-2287
17 June 2026

This bulletin supersedes 25-2302. Reason for update: update the labor time allowance for F-150 vehicles, update the
Parts list to replace the part number W716979-S439 with W721084-S439, and add a note for LV fluids XT-10-QLVC
and CXT-10-LV6 "Transfer Case Fluid".
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 or TCM
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 Description
W712658-S439

2

Solenoid Retaining Plate Bolt

HL3Z-7G007-A

6

Solenoid Retaining Clips

XT-12-QULV

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

Description

L1MZ-7F396-A

Only If Necessary (1 Possible) Fluid Pan Gasket

L1MZ-7N265-A

Only If Necessary (2 Possible) Fluid Pan To Case Seals

BL8Z-7G199-A

Only If Necessary (2 Possible) Hybrid Drive Unit Feed Tube Seals

L1MZ-7A098-B

Only If Necessary (1 Possible) Fluid Filter

L1MZ-7J135-A

Only If Necessary (1 Possible) Auxiliary Pump Seal

7T4Z-7Z302-A

Only If Necessary (1 Possible) Transmission Fluid Filter Seal

HL3Z-7Z490-E

Only If Necessary (1 Possible) Channel Plate

ML3Z-7Z490-C

Only If Necessary (1 Possible) Separator Plate (F-150)

L1MZ-7Z490-N

Only If Necessary (1 Possible) Separator Plate (Aviator, Explorer With Electronic Shift)

L1MZ-7Z490-P

Only If Necessary (1 Possible) Separator Plate (Explorer Without Electronic Shift)

Parts - 10R80 MHT CDF Cylinder Replacement - All Vehicles
Service Part Number Claim Quantity Description
HL3Z-7G091-F

5

Input Shaft Seals (F2)

HL3Z-7B399-C

4

Sun Gear No. 3 Shaft Seals (F7)

HL3Z-7C099-A

1

C Clutch Balance Dam Inner Seal

HL3Z-7A548-B

2

C Clutch Balance Dam And Piston Outer Seal

HL3Z-7D404-A

2

C And D Clutch Piston Inner Seals

HL3Z-7A262-C

1

D Clutch Balance Dam

HL3Z-7D403-A

1

D Clutch Piston Outer Seal

HL3Z-7A548-G

2

F Clutch Balance Dam And Piston Outer Seal

HL3Z-7A548-A

2

F Clutch Balance Dam And Piston Inner Seal

HL3Z-7G091-G

5

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

HL3Z-7G091-C

1

Input Shaft Seal (F9)

JL3Z-7H351-B

1

CDF Cylinder (Explorer/Aviator)

ML3Z-7H351-B

1

CDF Cylinder (F-150)

PC3Z-7B177-A

1

Clutch And Planetary Container Cylinder

Parts - 10R80 MHT CDF Cylinder Replacement - Parts To Inspect And Replace Only If Necessary - All
Vehicles
Service Part Number Claim Quantity

Description

ML3Z-7A191-A

Only If Necessary (1 Possible) Hybrid Drive Unit Gasket

HL3Z-7B066-AB

Only If Necessary (1 Possible) A Pressure Plate

HL3Z-7B164-E

Only If Necessary (3 Possible) A Clutch Friction Plates

HL3Z-7F220-A

Only If Necessary (2 Possible) A Clutch Steel Plates

HL3Z-7B442-F

Only If Necessary (5 Possible) C Clutch Steel Plates

HL3Z-7B164-A

Only If Necessary (5 Possible) C Clutch Friction Plates

ML3Z-7H095-A

Only If Necessary (5 Possible) C Clutch Friction Plates (F-150)

ML3Z-7B477-A

Only If Necessary (1 Possible) C Clutch Pressure Plate

HL3Z-7B442-D

Only If Necessary (6 Possible) D Clutch Steel Plates

HL3Z-7B164-C

Only If Necessary (6 Possible) D Clutch Friction Plates (Explorer/Aviator)

ML3Z-7B164-A

Only If Necessary (6 Possible) D Clutch Friction Plates (F-150)

HL3Z-7B066-E

Only If Necessary (1 Possible) D Clutch Pressure Plate (F-150)

HL3Z-7B164-G

Only If Necessary (4 Possible) F Clutch Steel Plates

HL3Z-7B164-D

Only If Necessary (4 Possible) F Clutch Friction Plates

HL3Z-7B066-A

Only If Necessary (1 Possible) F Clutch Pressure Plate

Parts - 10R80 MHT CDF Cylinder Replacement - Select One Of The Following If Needed - All Vehicles
Service Part Number Claim Quantity Description
HL3Z-7B066-AA

1

A Clutch Apply Plate 4.1 - 4.3 mm Selective

HL3Z-7B066-Z

1

A Clutch Apply Plate 4.4 - 4.6 mm Selective

HL3Z-7B066-Y

1

A Clutch Apply Plate 4.7 - 4.9 mm Selective

HL3Z-7B066-X

1

A Clutch Apply Plate 5.0 - 5.2 mm Selective

HL3Z-7B066-W

1

A Clutch Apply Plate 5.3 - 5.5 mm Selective

HL3Z-7H032-C

1

T-3 Bearing (Replace If T-3 Shim Is Replaced)

HL3Z-7A527-Q

1

T-3 Shim 3.05-3.15 mm Selective

HL3Z-7A527-P

1

T-3 Shim 3.20-3.30 mm Selective

HL3Z-7A527-R

1

T-3 Shim 3.35-3.45 mm Selective

HL3Z-7A527-K

1

T-3 Shim 3.50-3.60 mm Selective

HL3Z-7A527-L

1

T-3 Shim 3.65-3.75 mm Selective

HL3Z-7A527-M

1

T-3 Shim 3.80-3.90 mm Selective

HL3Z-7A527-S

1

T-3 Shim 3.95-4.05 mm Selective

HL3Z-7A527-T

1

T-3 Shim 4.10-4.20 mm Selective

HL3Z-7A527-N

1

T-3 Shim 4.25-4.35 mm Selective

HL3Z-7D483-A

1

D Clutch Snap Ring 1.8 mm Selective

HL3Z-7D483-B

1

D Clutch Snap Ring 2.0 mm Selective

HL3Z-7D483-C

1

D Clutch Snap Ring 2.2 mm Selective

HL3Z-7D483-D

1

D Clutch Snap Ring 2.4 mm Selective

HL3Z-7D483-E

1

D Clutch Snap Ring 2.6 mm Selective

HL3Z-7D483-F

1

D Clutch Snap Ring 2.8 mm Selective

HL3Z-7C122-A

1

C Clutch Snap Ring 1.5 mm Selective

HL3Z-7C122-B

1

C Clutch Snap Ring 1.7 mm Selective

HL3Z-7C122-C

1

C Clutch Snap Ring 1.9 mm Selective

HL3Z-7C122-D

1

C Clutch Snap Ring 2.1 mm Selective

HL3Z-7C122-E

1

C Clutch Snap Ring 2.3 mm Selective

HL3Z-7H365-C

1

F Clutch Snap Ring 1.5 mm Selective

HL3Z-7H365-D

1

F Clutch Snap Ring 1.7 mm Selective

HL3Z-7H365-E

1

F Clutch Snap Ring 1.9 mm Selective

HL3Z-7H365-F

1

F Clutch Snap Ring 2.1 mm Selective

HL3Z-7H365-G

1

F Clutch Snap Ring 2.3 mm Selective

Parts - F-150 Transmission Removal And Installation
Service Part
Number

Claim
Quantity

Description

7L1Z-4B496-C

2

CV Joint-To-Pinion Flange Cup Bolts And Retaining Straps
(4WD)

FL3Z-6775-D

1

Self-Adhesive Heat Shield

PL3Z-5C226-A

2

Left And Right Catalytic Converter Gasket (3.5L)

W520113-S440

4

Stabilizer Bar Bracket Nuts

W520114-S442

4

Transmission Support Crossmember Nuts

W520514-S440

4

Left And Right Catalytic Converter Nuts

Note

W704980-S439

1

Park Manual Release Cable Bracket Bolt

W709771-S440

2

Transmission Mount Nuts

W711140-S901

3

Transmission Insulator Bolts And Washers (RWD)

W714418-S439

4

Transmission Support Crossmember Bolts

W718926-S900

4

Transmission Insulator Bolts (4WD)

W714717-S439

2

Muffler Inlet Pipe Bolts