How to service the output shaft seal for RWD and 4WD on Ford F-150?

When servicing the output shaft seal, the vehicle is typically placed in NEUTRAL and positioned on a hoist so the driveline can be accessed; depending on whether the application is rear-wheel drive or four-wheel drive, different components are first removed. On rear-wheel-drive vehicles the rear driveshaft is removed and the output shaft flange nut is un-staked and discarded, care being taken to avoid damage to the output shaft, then the extension housing flange seal and output shaft flange are taken off and the output shaft seal is extracted using an input-shaft oil seal remover and slide hammer, with the slip-plane washer removed as well. In some cases, four-wheel-drive units are serviced by removing the transfer case first, and the output seal is pulled in the same way with the seal-removal tools. Reassembly is similarly dependent on configuration: for RWD applications the slip-plane washer is reinstalled, a new output seal is positioned and seated with the 6R80 Rear Seal 4X2 installer, the output flange and extension housing seal are refitted, and a new flange nut is torqued to about 80 Nm (59 lb-ft) and staked at the slots to prevent loosening before the driveshaft is reassembled; for 4WD units the output seal is positioned and installed with the 6R80 Rear Seal 4X4 installer and the transfer case is reinstalled. Finally, transmission fluid is replenished and checked to complete the service.

OEM Ford Output Shaft Seal

Output Seal

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20 Output Shaft Seals found

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Ford Axle Seal, Front Outer Part Number: AC3Z-1S175-A
$30.99 MSRP: $50.00
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Product Specifications
- Other Name: Seal; Drive Axle Shaft Seal, Front Outer; Axle Spindle Seal; Axle Seals; Inner Seal
- Position: Front Outer
- Replaces: 5C3Z-1S175-AA, 7C3Z-1S175-A
Fits the following Ford Models:
- F-250 Super Duty | 2008-2025 | Cabela's, FX4, Harley-Davidson Edition, King Ranch, Lariat, Limited, Platinum, XL, XLT | 10 Cyl 6.8 L GAS, 5.4L V8, 6.4L V8, 6.8L V10, 8 Cyl 5.4 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.4 L DIESEL, 8 Cyl 6.7 L DIESEL, 8 Cyl 6.8 L FLEX, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
- F-350 Super Duty | 2008-2025 | Cabela's, FX4, Harley-Davidson Edition, King Ranch, Lariat, Limited, Platinum, XL, XLT | 10 Cyl 6.8 L GAS, 5.4L V8, 6.4L V8, 6.8L V10, 8 Cyl 5.4 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.4 L DIESEL, 8 Cyl 6.7 L DIESEL, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
- F-450 Super Duty | 2008-2010 | FX4, Lariat, XL, XLT | 5.4L V8, 6.4L V8, 6.8L V10
- F-550 Super Duty | 2008-2010 | FX4, Lariat, XL, XLT | 5.4L V8, 6.4L V8, 6.8L V10
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Ford Output Shaft Seal Part Number: FL3Z-7B215-C
$21.18 MSRP: $30.83
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Product Specifications
- Other Name: Seal; Automatic Transmission Transfer Shaft Seals; Transfer Case Output Shaft Seal
- Manufacturer Note: Front Output
Fits the following Ford Models:
- Expedition | 2018-2021 | King Ranch, Limited, Max King Ranch, Max Limited, Max Platinum, Max SSV, Max XL, Max XLT, Platinum, SSV, XL, XLT | 6 Cyl 3.5 L GAS
- F-150 | 2017-2020 | King Ranch, Lariat, Limited, Platinum, Police Responder, Raptor, SSV, XL, XLT | 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.3 L FLEX, 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS, 8 Cyl 5.0 L FLEX
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Ford Output Shaft Seal Part Number: HC3Z-7B215-C
$21.03 MSRP: $29.83
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Product Specifications
- Other Name: Seal
- Manufacturer Note: Rear Output
- Replaced by: PC3Z-7B215-A
Fits the following Ford Models:
- F-250 Super Duty | 2023-2025 | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL, 8 Cyl 6.8 L FLEX, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
- F-350 Super Duty | 2023-2025 | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
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Ford Output Shaft Seal Part Number: FL3Z-7B215-B
$21.74 MSRP: $30.83
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Product Specifications
- Other Name: Seal; Automatic Transmission Output Shaft Seal; Transfer Case Output Shaft Seal; Axle Seal
- Manufacturer Note: Rear Output
Fits the following Ford Models:
- Expedition | 2018-2021 | King Ranch, Limited, Max King Ranch, Max Limited, Max Platinum, Max SSV, Max XL, Max XLT, Platinum, SSV, XL, XLT | 6 Cyl 3.5 L GAS
- F-150 | 2017-2020 | King Ranch, Lariat, Limited, Platinum, Police Responder, Raptor, SSV, XL, XLT | 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.3 L FLEX, 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS, 8 Cyl 5.0 L FLEX
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Ford Output Shaft Seal Part Number: HC3Z-7B215-B
$28.20 MSRP: $40.00
You Save: $11.80 (30%)
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Product Specifications
- Other Name: Seal
- Manufacturer Note: Rear Output
Fits the following Ford Models:
- F-250 Super Duty | 2023-2025 | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL, 8 Cyl 6.8 L FLEX, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
- F-350 Super Duty | 2023-2025 | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
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Ford Drive Unit Outer Seal Part Number: JM5Z-1S177-A
$16.26 MSRP: $25.82
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Product Specifications
- Other Name: Seal
- Position: Outer
Fits the following Ford Models:
- F-150 Lightning | 2022-2025 | Flash, Lariat, Platinum, Pro, Pro SSV, XLT | BATTERY EV (EV/BEV)
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Ford Output Shaft Seal Part Number: E1GZ-7275-A
$92.57 MSRP: $134.75
You Save: $42.18 (32%)
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Product Specifications
- Other Name: Kit - Power Take Off
Fits the following Ford Models:
- Focus | 2016-2018 | RS, S, SE, SEL, ST, Titanium | 3 Cyl 1.0 L GAS, 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS
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Ford Axle Seal, Front Part Number: MB3Z-4B416-A
$7.14 MSRP: $10.13
You Save: $2.99 (30%)
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Product Specifications
- Other Name: Seal; Drive Axle Shaft Seal, Front; Axle Seals
- Position: Front
Fits the following Ford Models:
- Bronco | 2021-2025 | Badlands, Base, Big Bend, Black Diamond, Everglades, First Edition, Heritage Edition, Heritage Limited Edition, Outer Banks, Raptor, Wildtrak | 4 Cyl 2.3 L GAS, 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L GAS
- Ranger | 2024-2025 | Lariat, Raptor, XL, XLT | 4 Cyl 2.3 L GAS, 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L GAS
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Ford Output Shaft Seal Part Number: M1MZ-7B215-A
$11.75 MSRP: $16.67
You Save: $4.92 (30%)
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Product Specifications
- Other Name: Seal; Input Shaft Seal
- Replaces: FL3Z-7B215-A
Fits the following Ford Models:
- Expedition | 2018-2024 | King Ranch, Limited, Max King Ranch, Max Limited, Max Platinum, Max SSV, Max XL, Max XLT, Platinum, Premium, SSV, Timberline, XL, XL STX, XLT | 3.5L V6, 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- Explorer | 2020-2025 | Active, Base, King Ranch, Limited, Limited Hybrid, Platinum, Platinum Hybrid, ST, ST-Line, Timberline, XLT | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L FLEX, 6 Cyl 3.3 L FULL HYBRID EV-GAS (FHEV)
- F-150 | 2015-2025 | King Ranch, Lariat, Limited, Phantom, Platinum, Police Responder, Premium, Raptor, SSV, STX, Tremor, XL, XLT | 2.7L V6, 3.0L V6, 3.3L V6, 3.5L V6, 5.0L V8, 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.3 L FLEX, 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L FULL HYBRID EV-GAS (FHEV), 6 Cyl 3.5 L GAS, 8 Cyl 5.0 L FLEX, 8 Cyl 5.2 L GAS
- F-250 Super Duty | 2017-2019 | King Ranch, Lariat, Premium, XL, XLT | 6.2L V8, 6.7L V8, 6.8L V10
- F-350 Super Duty | 2017-2019 | King Ranch, Lariat, Premium, XL, XLT | 6.2L V8, 6.7L V8, 6.8L V10
- F-450 Super Duty | 2017-2019 | King Ranch, Lariat, Premium, XL, XLT | 6.2L V8, 6.7L V8, 6.8L V10
- F-550 Super Duty | 2017-2019 | King Ranch, Lariat, Premium, XL, XLT | 6.2L V8, 6.7L V8, 6.8L V10
- Police Interceptor Utility | 2020-2025 | Base | 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L FLEX, 6 Cyl 3.3 L FULL HYBRID EV-GAS (FHEV)
- Transit-150 | 2020-2024 | Base, PTV, XL, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- Transit-250 | 2020-2024 | Base, PTV | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
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Ford Drive Unit Outer Seal, Driver Side Part Number: GN1Z-1177-A
$34.95 MSRP: $50.00
You Save: $15.05 (31%)
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Product Specifications
- Other Name: Seal; Drive Motor Seal, Left Outer
- Position: Driver Side
Fits the following Ford Models:
- Mustang Mach-E | 2021-2025 | California Route 1, First Edition, Premium, Select | BATTERY EV (EV/BEV)
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Ford Output Shaft Seal Part Number: AB3Z-7B215-B
$18.32 MSRP: $26.67
You Save: $8.35 (32%)
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Product Specifications
- Other Name: Seal; Automatic Transmission Transfer Shaft Seals; Transfer Case Output Shaft Seal
- Manufacturer Note: Rear Output
Fits the following Ford Models:
- Ranger | 2019-2023 | Lariat, XL, XLT | 4 Cyl 2.3 L GAS
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Ford Output Shaft Seal Part Number: JB3Z-7B215-C
$45.75 MSRP: $65.45
You Save: $19.70 (31%)
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Product Specifications
- Other Name: Seal; Automatic Transmission Output Shaft Seal; Transfer Case Output Shaft Seal; Axle Seal
- Manufacturer Note: Front Output
Fits the following Ford Models:
- Ranger | 2019-2025 | Lariat, Raptor, XL, XLT | 4 Cyl 2.3 L GAS, 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L GAS
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Ford Output Shaft Seal Part Number: MB3Z-7B215-B
$1.60 MSRP: $2.27
You Save: $0.67 (30%)
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Product Specifications
- Other Name: Seal
Fits the following Ford Models:
- Bronco | 2022-2024 | Raptor | 6 Cyl 3.0 L GAS
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Ford Output Shaft Seal Part Number: ML3Z-7B215-B
$8.05 MSRP: $11.42
You Save: $3.37 (30%)
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Product Specifications
- Other Name: Seal; Automatic Transmission Output Shaft Seal; Transfer Case Output Shaft Seal; Axle Seal; Input Shaft Seal
Fits the following Ford Models:
- Expedition | 2022-2024 | King Ranch, Limited, Max King Ranch, Max Limited, Max Platinum, Max SSV, Max XL, Max XLT, Platinum, SSV, Timberline, XL, XL STX, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- F-150 | 2021-2025 | King Ranch, Lariat, Limited, Platinum, Police Responder, Raptor, SSV, STX, Tremor, XL, XLT | 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.3 L FLEX, 6 Cyl 3.5 L FULL HYBRID EV-GAS (FHEV), 6 Cyl 3.5 L GAS, 8 Cyl 5.0 L FLEX, 8 Cyl 5.2 L GAS
- F-250 Super Duty | 2023-2025 | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL, 8 Cyl 6.8 L FLEX, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
- F-350 Super Duty | 2023-2025 | King Ranch, Lariat, Limited, Platinum, XL, XLT | 8 Cyl 6.7 L DIESEL, 8 Cyl 6.8 L GAS, 8 Cyl 7.3 L GAS
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Ford Output Shaft Seal Part Number: ML3Z-7B215-A
$18.80 MSRP: $26.67
You Save: $7.87 (30%)
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Product Specifications
- Other Name: Seal; Automatic Transmission Output Shaft Seal; Transfer Case Output Shaft Seal; Axle Seal; Input Shaft Seal
Fits the following Ford Models:
- Expedition | 2022-2024 | King Ranch, Limited, Max King Ranch, Max Limited, Max Platinum, Max SSV, Max XL, Max XLT, Platinum, SSV, Timberline, XL, XL STX, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- F-150 | 2021-2025 | King Ranch, Lariat, Limited, Platinum, Police Responder, Raptor, SSV, STX, Tremor, XL, XLT | 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.3 L FLEX, 6 Cyl 3.5 L FULL HYBRID EV-GAS (FHEV), 6 Cyl 3.5 L GAS, 8 Cyl 5.0 L FLEX, 8 Cyl 5.2 L GAS
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Ford Output Shaft Seal, Rear Part Number: MB3Z-7B215-A
$18.32 MSRP: $26.67
You Save: $8.35 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Seal; Transfer Case Output Shaft Seal, Rear; Automatic Transmission Seals; Axle Seal
- Position: Rear
- Replaces: L1MZ-7B215-A
Fits the following Ford Models:
- Bronco | 2021-2024 | Badlands, Base, Big Bend, Black Diamond, Everglades, First Edition, Heritage Edition, Heritage Limited Edition, Outer Banks, Raptor, Wildtrak | 4 Cyl 2.3 L GAS, 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L GAS
- Explorer | 2020-2025 | Active, Base, King Ranch, Limited, Limited Hybrid, Platinum, Platinum Hybrid, ST, ST-Line, Timberline, XLT | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L FLEX, 6 Cyl 3.3 L FULL HYBRID EV-GAS (FHEV)
- Police Interceptor Utility | 2020-2025 | Base | 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L FLEX, 6 Cyl 3.3 L FULL HYBRID EV-GAS (FHEV)
- Ranger | 2024-2025 | Lariat, Raptor, XL, XLT | 4 Cyl 2.3 L GAS, 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L GAS
- Transit-150 | 2020-2024 | Base, PTV, XL, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- Transit-250 | 2020-2024 | Base, PTV | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- Transit-350 | 2020-2024 | Base, PTV, XL, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- Transit-350 HD | 2020-2024 | Base, PTV, XL, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
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Ford Output Shaft Seal Part Number: JB3Z-7B215-A
$28.20 MSRP: $40.00
You Save: $11.80 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Seal; Input Shaft Seal
Fits the following Ford Models:
- Bronco | 2021-2024 | Badlands, Base, Big Bend, Black Diamond, Everglades, First Edition, Heritage Edition, Heritage Limited Edition, Outer Banks, Raptor, Wildtrak | 4 Cyl 2.3 L GAS, 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L GAS
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Ford Output Shaft Seal Part Number: K2GZ-7H469-D
$35.49 MSRP: $46.46
You Save: $10.97 (24%)
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Product Specifications
- Other Name: Kit - Seal; Automatic Transmission Transfer Shaft Seals; Input Shaft Seal; Transfer Case Shifter Seal.; Input Shaft Seal
- Replaces: K2GZ-7H469-B
Fits the following Ford Models:
- Bronco Sport | 2021-2025 | Badlands, Base, Big Bend, First Edition, Free Wheeling, Heritage Edition, Heritage Limited Edition, Outer Banks | 3 Cyl 1.5 L GAS, 4 Cyl 2.0 L GAS
- Maverick | 2022 | Lariat, XL, XLT | 4 Cyl 2.0 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Ford Axle Seal, Front Inner Part Number: AL3Z-4B416-A
$28.20 MSRP: $40.00
You Save: $11.80 (30%)
Product Specifications
- Other Name: Seal - Dust; Drive Axle Shaft Bearing Seal, Front Inner; CV Intermediate Shaft Seal, Rear; Differential Seal, Front
- Position: Front Inner
- Replaces: 9L2Z-4B416-B
Fits the following Ford Models:
- Expedition | 2018-2025 | Active, King Ranch, Limited, Max Active, Max King Ranch, Max Limited, Max Platinum, Max SSV, Max XL, Max XLT, Platinum, SSV, Timberline, Tremor, XL, XL STX, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- F-150 | 2009-2025 | FX2, FX4, FX4 Off Road, Harley-Davidson Edition, King Ranch, Lariat, Lariat Limited, Limited, Lincoln, Platinum, Police Responder, Raptor, SSV, STX, SVT Raptor, Tremor, XL, XLT | 4.6L V8, 5.4L V8, 6 Cyl 2.7 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.3 L FLEX, 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L FULL HYBRID EV-GAS (FHEV), 6 Cyl 3.5 L GAS, 6 Cyl 3.7 L CNG, 6 Cyl 3.7 L FLEX, 6 Cyl 3.7 L LPG, 6.2L V8, 8 Cyl 4.6 L GAS, 8 Cyl 5.0 L FLEX, 8 Cyl 5.2 L GAS, 8 Cyl 5.4 L FLEX, 8 Cyl 6.2 L GAS
- Mustang | 2015-2025 | Bullitt, Dark Horse, Dark Horse Premium, EcoBoost, EcoBoost Premium, GT, GT 50 Years Limited Edition, GT Premium, Mach 1, Shelby GT350, Shelby GT350R, Shelby GT500, V6 | 4 Cyl 2.3 L GAS, 6 Cyl 3.7 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS
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Ford Output Shaft Seal, Front Part Number: L1MZ-7B215-D
$28.20 MSRP: $40.00
You Save: $11.80 (30%)
Product Specifications
- Other Name: Seal; Transfer Case Output Shaft Seal, Front
- Position: Front
- Replaces: L1MZ-7B215-B
Fits the following Ford Models:
- Transit-150 | 2020-2024 | Base, PTV, XL, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- Transit-250 | 2020-2024 | Base, PTV | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- Transit-350 | 2020-2024 | Base, PTV, XL, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
- Transit-350 HD | 2020-2024 | Base, PTV, XL, XLT | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS
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Ford Output Shaft Seal

If you own Ford and want to keep it in top shape, choosing OEM Output Shaft Seal is a smart move. They are precisely engineered and follow strict factory standards. They are made in advanced facilities that use cutting edge technology. Each part goes through thorough testing to confirm strength and safety, so you can trust it. FordPartsDeal.com gives you genuine Ford Output Shaft Seal at some of the affordable online prices without cutting quality. Every OEM Ford part includes the manufacturer's warranty, easy returns, and super-fast delivery. So why wait? Shop now and get your vehicle back to peak condition.

Ford Output Shaft Seal are rubber lips that keep the transmission fluid from leaking out and dirt from leaking in. Established in 1903, Ford revolutionized manufacturing with the moving assembly line, reducing both production time and expenses and thus making car ownership accessible to all. The brand has introduced concepts over the years, such as the punchy EcoBoost engines that wring more miles from less fuel without sacrificing fun. Instead of poking screens, drivers converse with their ride using SYNC voice control, queueing playlists and directions. Co-Pilot360 can alert the driver to lane-drifting and can brake when the traffic stops. The Ford F-150 Lightning was an electric truck that proved in 2022 that an electric truck can haul and leave no fumes. It's the same electric current that has powered the entire Ford and is strongly indicative of an ongoing love of straightforward answers over features. When the Output Shaft Seal is worn, it may leak out fluid at a rapid rate, and if the tail housing is damp, it's time to replace the seal. The seal itself has a spring in its lip that clings to the spinning shaft as it flexes on each bump but does not allow the lubricant to pass between. A new Output Shaft Seal prevents dirt from entering and prevents the possibility of it scarring gears and reducing service life. The Output Shaft Seal should be inspected when performing routine fluid changes and Ford will continue to shift clean and smooth.

Ford Output Shaft Seal Parts and Q&A

Axle Seal, Front Inner
AL3Z-4B416-A
Q: How to service the output shaft seal for RWD and 4WD on Ford F-150?
A:
When servicing the output shaft seal, the vehicle is typically placed in NEUTRAL and positioned on a hoist so the driveline can be accessed; depending on whether the application is rear-wheel drive or four-wheel drive, different components are first removed. On rear-wheel-drive vehicles the rear driveshaft is removed and the output shaft flange nut is un-staked and discarded, care being taken to avoid damage to the output shaft, then the extension housing flange seal and output shaft flange are taken off and the output shaft seal is extracted using an input-shaft oil seal remover and slide hammer, with the slip-plane washer removed as well. In some cases, four-wheel-drive units are serviced by removing the transfer case first, and the output seal is pulled in the same way with the seal-removal tools. Reassembly is similarly dependent on configuration: for RWD applications the slip-plane washer is reinstalled, a new output seal is positioned and seated with the 6R80 Rear Seal 4X2 installer, the output flange and extension housing seal are refitted, and a new flange nut is torqued to about 80 Nm (59 lb-ft) and staked at the slots to prevent loosening before the driveshaft is reassembled; for 4WD units the output seal is positioned and installed with the 6R80 Rear Seal 4X4 installer and the transfer case is reinstalled. Finally, transmission fluid is replenished and checked to complete the service.