How to replace the extension house seal and vehicle speed sensor O-ring on Lincoln Navigator?

Oil leaks may occur due to wear of the extension housing oil seal, or the vehicle speed sensor seal, and these are fairly easy to replace, and it is normally does not require that the transmission needs to be unbolted from the car. To perform the extension housing seal leak check, jack up the vehicle and securely support on jack stands: engage the parking brake and if equipped, turn off the air suspension system. A leaking extension housing seal will show transmission lubricant on the front of driveshaft and may drip down from rear of the transmission. Starting with the removal of driveshaft, tap the dust shoe if in place with a soft-face hammer so as not to distort it. Remove the extension housing seal without marring the splines of the trans output shaft. Replace the old extension housing seal with a new one with the assistance of a section of pipe or a deep socket, thereafter replacing the bushing should one be required. Lubricate the splines of the output shaft of the transmission and outside of the driveshaft sleeve yoke with light weight grease before installing the driveshaft making sure that you do not damage the lip of the new seal. After that, deflate the vehicle if you are using Air suspension system then switch it on. To access the vehicle speed sensor which is on the left side of the extension housing, you have to lift the vehicle and support it well and in case the vehicle is of air suspension type, then you should switch off the air suspension. A leaking sensor seal will mean that transmission lubricant will be seen dripping from the left side of the extension housing. Disconnect the electrical connector from the vehicle speed sensor then remove the bolt to hold the sensor and pull the sensor in a line with the opening. Remove the 0-ring and replace it, using lubrication on the new one so as to afford it protection during the process. Replace the sensor and grease the seal and the sensor with fresh engine oil and then lower the car and switch on the air suspension system if any.

Genuine Lincoln Navigator Transfer Case Seal

Transfer Case Output Shaft Seal

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Lincoln Navigator Seal Assembly - Oil
Part Number: 9L3Z-7052-A
$18.35 MSRP: $18.83
You Save: $0.48 (3%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Extension Housing Seal
- Manufacturer Note: Inner Diameter = 62.7MM
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2014 Lincoln Navigator | 8 Cyl 5.4L | 6-Speed Automatic Transmission (6R80), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Seal
Part Number: 6L3Z-7B215-A
$15.16 MSRP: $22.17
You Save: $7.01 (32%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Manufacturer Note: Seal-front output
- Replaces: E7TZ-7B215-B, F4TZ-7B215-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2017 Lincoln Navigator | 6 Cyl 3.5L GTDI, 8 Cyl 5.4L, 8 Cyl 5.4L DOHC EFI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Seal Assembly - Oil
Part Number: 9L3Z-7052-B
$12.88 MSRP: $18.83
You Save: $5.95 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Assy - Oil; Extension Housing Seal
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2014 Lincoln Navigator | 8 Cyl 5.4L | 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive
View related parts
Lincoln Navigator Seal Assembly - Oil
Part Number: 9L3Z-7052-C
$15.16 MSRP: $22.17
You Save: $7.01 (32%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Assy - Oil; Extension Housing Seal
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2012-2014 Lincoln Navigator | 8 Cyl 5.4L | 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive
View related parts
Lincoln Navigator Seal Assembly - Oil
Part Number: FL3Z-7052-B
$15.16 MSRP: $22.17
You Save: $7.01 (32%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Assy - Oil; Extension Housing Seal
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2017 Lincoln Navigator | 6 Cyl 3.5L GTDI, 8 Cyl 5.4L | 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive
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Lincoln Navigator Seal
Part Number: F4TZ-7B215-A
$15.16 MSRP: $22.17
You Save: $7.01 (32%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Replaced by: 6L3Z-7B215-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2006 Lincoln Navigator | 8 Cyl 5.4L, 8 Cyl 5.4L DOHC EFI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Navigator Seal Assembly - Oil
Part Number: F6TZ-7052-A
$13.00 MSRP: $18.83
You Save: $5.83 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Assy - Oil; Extension Housing Seal, Rear Seal
- Replaces: D5AZ-7052-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2004 Lincoln Navigator | 8 Cyl 5.4L, 8 Cyl 5.4L DOHC EFI | 4AT 4R100, 4AT E4OD, 4-Speed Automatic Transmission E4OD(4R100), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Lincoln Navigator Seal
Part Number: 2L1Z-7B215-A
$23.40 MSRP: $33.33
You Save: $9.93 (30%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Manufacturer Note: Seal-rear output
- Replaces: E8TZ-7B215-A, F4TZ-7B215-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2017 Lincoln Navigator | 6 Cyl 3.5L GTDI, 8 Cyl 5.4L, 8 Cyl 5.4L DOHC EFI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Navigator Seal Assembly - Oil
Part Number: 6L2Z-7052-CA
$9.95 MSRP: $14.17
You Save: $4.22 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Assy - Oil; Extension Housing Seal
- Manufacturer Note: Inner Diameter = 27.0MM
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2017 Lincoln Navigator | 6 Cyl 3.5L GTDI, 8 Cyl 5.4L | 6-Speed Automatic Transmission (6R80), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Navigator Seal
Part Number: F77Z-7B215-AA
$9.95 MSRP: $14.17
You Save: $4.22 (30%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2017 Lincoln Navigator | 6 Cyl 3.5L GTDI, 8 Cyl 5.4L, 8 Cyl 5.4L DOHC EFI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Navigator Seal Assembly - Oil
Part Number: FL3Z-7052-A
$18.14 MSRP: $25.83
You Save: $7.69 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Assy - Oil; Extension Housing Seal
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2014-2017 Lincoln Navigator | 6 Cyl 3.5L GTDI, 8 Cyl 5.4L | 6-Speed Automatic Transmission (6R80), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Navigator Seal
Part Number: F4TZ-7B215-B
$23.40 MSRP: $33.33
You Save: $9.93 (30%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Replaced by: 2L1Z-7B215-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2006 Lincoln Navigator | 8 Cyl 5.4L, 8 Cyl 5.4L DOHC EFI | 4-Speed Automatic Transmission E4OD(4R100), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Navigator Seal Assembly - Oil
Part Number: 5L7Z-7052-BA
$13.73 MSRP: $18.75
You Save: $5.02 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal Assy - Oil; Extension Housing Seal
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Lincoln Navigator | 8 Cyl 5.4L | 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive
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Lincoln Navigator SEAL
Part Number: M1MZ-7B215-A
$9.95 MSRP: $14.17
You Save: $4.22 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Input Shaft Seal, Output Shaft Seal
- Replaces: FL3Z-7B215-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2018-2023 Lincoln Navigator | 6 Cyl 3.5 L GAS, 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
View related parts
Lincoln Navigator SEAL
Part Number: ML3Z-7B215-A
$8.39 MSRP: $11.95
You Save: $3.56 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Input Shaft Seal, Output Shaft Seal
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2022-2023 Lincoln Navigator | 6 Cyl 3.5 L GAS
View related parts
Lincoln Navigator SEAL
Part Number: ML3Z-7B215-B
$7.89 MSRP: $11.23
You Save: $3.34 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Input Shaft Seal, Output Shaft Seal
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2022-2023 Lincoln Navigator | 6 Cyl 3.5 L GAS
View related parts
Lincoln Navigator Seal Assembly - Oil
Part Number: 5L7Z-7052-AA
Product Specifications
- Other Name: Seal Assy - Oil; Extension Housing Seal
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Lincoln Navigator | 8 Cyl 5.4L | 6-Speed Automatic Transmission ZF 6HP26 Steptronic, Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)

Lincoln Navigator Transfer Case Seal

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Lincoln Navigator Transfer Case Seal Parts Questions & Experts Answers

Seal Assembly - Oil
F6TZ-7052-A
Q: How to replace the extension house seal and vehicle speed sensor O-ring on Lincoln Navigator?
A: Oil leaks may occur due to wear of the extension housing oil seal, or the vehicle speed sensor seal, and these are fairly easy to replace, and it is normally does not require that the transmission needs to be unbolted from the car. To perform the extension housing seal leak check, jack up the vehicle and securely support on jack stands: engage the parking brake and if equipped, turn off the air suspension system. A leaking extension housing seal will show transmission lubricant on the front of driveshaft and may drip down from rear of the transmission. Starting with the removal of driveshaft, tap the dust shoe if in place with a soft-face hammer so as not to distort it. Remove the extension housing seal without marring the splines of the trans output shaft. Replace the old extension housing seal with a new one with the assistance of a section of pipe or a deep socket, thereafter replacing the bushing should one be required. Lubricate the splines of the output shaft of the transmission and outside of the driveshaft sleeve yoke with light weight grease before installing the driveshaft making sure that you do not damage the lip of the new seal. After that, deflate the vehicle if you are using Air suspension system then switch it on. To access the vehicle speed sensor which is on the left side of the extension housing, you have to lift the vehicle and support it well and in case the vehicle is of air suspension type, then you should switch off the air suspension. A leaking sensor seal will mean that transmission lubricant will be seen dripping from the left side of the extension housing. Disconnect the electrical connector from the vehicle speed sensor then remove the bolt to hold the sensor and pull the sensor in a line with the opening. Remove the 0-ring and replace it, using lubrication on the new one so as to afford it protection during the process. Replace the sensor and grease the seal and the sensor with fresh engine oil and then lower the car and switch on the air suspension system if any.