How to replace the seal on a transfer case and reassemble the driveshaft on Mercury Mariner?

Raise the vehicle and support it securely on jackstands, then drain the transfer case lubricant. Remove the driveshaft and mark the relative positions of the pinion, nut, and flange. Use a beam or dial-type inch-pound torque wrench to determine the torque required to rotate the pinion, recording it for later use. Count the number of threads visible between the end of the nut and the end of the pinion shaft, and record that as well. Remove the flange mounting nut using a chain wrench to hold the pinion flange while loosening the locknut, then take off the companion flange, which may require a small puller for removal. Pry out the seal with a screwdriver or seal removal tool, taking care not to damage the seal bore. Lubricate the lips of the new seal with multi-purpose grease and tap it evenly into position with a seal installation tool or a large socket, ensuring it enters the housing squarely and is tapped to its full depth. Align the mating marks made before disassembly and install the companion flange, tightening the pinion nut if necessary to draw the flange into place. Carefully tighten the nut until the original number of threads are exposed and the marks are aligned, then measure the torque required to rotate the pinion, tightening the nut in small increments until it matches the previously recorded figure. Finally, connect the driveshaft, add the specified lubricant to the transfer case, and lower the vehicle.

Genuine Mercury Mariner Transfer Case Seal

Transfer Case Output Shaft Seal

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8 Transfer Case Seals found

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Mercury Mariner Seal
Part Number: 5L8Z-1S177-AB
$12.23 MSRP: $19.09
You Save: $6.86 (36%)
Ships in 1 Business Day
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Product Specifications
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 5-Speed Manual Transmission - AK, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
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Mercury Mariner Seal
Part Number: 5M6Z-1177-RA
$15.56 MSRP: $22.17
You Save: $6.61 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Mariner Seal
Part Number: 9L8Z-1177-B
$24.51 MSRP: $39.09
You Save: $14.58 (38%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Manufacturer Note: Converter Side
- Position: Passenger Side
- Replaced by: 9L8Z-1177-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L OHC Duratec | 6-Speed Automatic Transmission 6F Mid-Range, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Mariner Seal
Part Number: YL8Z-1S177-AA
$23.60 MSRP: $37.64
You Save: $14.04 (38%)
ADD TO CART
Product Specifications
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, Four-Wheel Drive (Full Time) (Left Hand Drive), Left Hand Drive
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Mercury Mariner Seal
Part Number: 9L8Z-1177-A
$13.22 MSRP: $18.83
You Save: $5.61 (30%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Manufacturer Note: Case Side
- Position: Driver Side
- Replaced by: 9L8Z-1177-G
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L OHC Duratec | 6-Speed Automatic Transmission 6F Mid-Range, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Mercury Mariner Seal
Part Number: 5M6Z-1177-LA
$13.22 MSRP: $18.83
You Save: $5.61 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Mercury Mariner Seal
Part Number: 9L8Z-1177-C
$6.86 MSRP: $10.65
You Save: $3.79 (36%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Manufacturer Note: Converter Side
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | 4 Cyl 2.5L Duratec (110kW/150PS), 4 Cyl 2.5L PFI Gas/Electric, 6 Cyl 3.0L OHC Duratec | 6-Speed Automatic Transmission 6F Mid-Range, Four-Wheel Drive (Full Time) (Left Hand Drive), Left Hand Drive
View related parts
Mercury Mariner Seal
Part Number: 2F1Z-1177-AB
$12.88 MSRP: $18.83
You Save: $5.95 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Position: Passenger Side/Driver Side
- Replaces: E6DZ-1177-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 6 Cyl 3.0L DOHC EFI Modular | 4AT CD4E, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive)

Mercury Mariner Transfer Case Seal

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Mercury Mariner Transfer Case Seal Parts Questions & Experts Answers

Seal
YL8Z-1S177-AA
Q: How to replace the seal on a transfer case and reassemble the driveshaft on Mercury Mariner?
A: Raise the vehicle and support it securely on jackstands, then drain the Transfer Case lubricant. Remove the driveshaft and mark the relative positions of the pinion, nut, and flange. Use a beam or dial-type inch-pound torque wrench to determine the torque required to rotate the pinion, recording it for later use. Count the number of threads visible between the end of the nut and the end of the pinion shaft, and record that as well. Remove the flange mounting nut using a chain wrench to hold the pinion flange while loosening the locknut, then take off the companion flange, which may require a small puller for removal. Pry out the seal with a screwdriver or seal removal tool, taking care not to damage the seal bore. Lubricate the lips of the new seal with multi-purpose grease and tap it evenly into position with a seal installation tool or a large socket, ensuring it enters the housing squarely and is tapped to its full depth. Align the mating marks made before disassembly and install the companion flange, tightening the pinion nut if necessary to draw the flange into place. Carefully tighten the nut until the original number of threads are exposed and the marks are aligned, then measure the torque required to rotate the pinion, tightening the nut in small increments until it matches the previously recorded figure. Finally, connect the driveshaft, add the specified lubricant to the transfer case, and lower the vehicle.

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