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Timken 4278 Differential Pinion Seal - Rear or Rear OuterOE Quality 60-Day Returns
Part #: 4278

Timken 4278 Differential Pinion Seal - Rear or Rear Outer

Rear
265 vehicles fit this part
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Fitment: Ford and Lincoln, Expedition, F-150, Mustang, Navigator, Transit-150, Transit-250, Transit-350, Transit-350 HD, F-250 Super Duty, F-350 Super Duty, E-250, Mark LT, E-150, E-150 Club Wagon, E-350 Club Wagon, E-350 Super Duty, Excursion, F-150 Heritage, Aviator, E-150 Econoline, E-150 Econoline Club Wagon, E-350 Econoline Club Wagon, Blackwood, E-250 Econoline, E-350 Econoline, F-250, and F-350
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Reliable Differential Pinion Seal for Ford and Lincoln Vehicles

The Timken 4278 Differential Pinion Seal is designed to provide a secure and durable seal for driveline components in select Ford and Lincoln models. Engineered to maintain optimal performance, this pinion seal helps prevent leaks and protects your vehicle's differential system.

  • Compatible with various Ford and Lincoln models including F-150, Expedition, Mustang, and Navigator
  • Durable construction to resist wear and maintain sealing integrity
  • Precision fit for differential pinion shafts to reduce oil leakage
  • OEM-quality replacement part ensuring reliable driveline performance
  • Part number 4278 for easy identification and ordering

Product Details and Compatibility

The Timken 4278 Differential Pinion Seal is specifically designed for use in a range of Ford and Lincoln vehicles such as the Ford F-150, F-250 Super Duty, E-350 Econoline, Lincoln Navigator, and Aviator. This seal fits differential pinion shafts, providing a tight barrier to prevent gear oil from leaking out of the differential housing. Maintaining a proper seal is critical to the longevity and smooth operation of the driveline system. The part number 4278 corresponds to this exact seal, ensuring compatibility and ease of replacement.

Common Applications and Problem Solving

  • Prevents differential oil leaks that can cause driveline damage
  • Reduces contamination of differential components by dirt and debris
  • Helps maintain proper lubrication levels within the differential
  • Addresses wear-related seal failures in Ford and Lincoln differentials
  • Supports smooth and quiet operation of the driveline system

Installation Notes and Tips

When installing the Timken 4278 Differential Pinion Seal, ensure the differential housing and pinion shaft are clean and free of debris. Use appropriate tools to avoid damaging the seal during installation. It is recommended to inspect the pinion shaft for wear or damage before fitting the new seal. Proper lubrication of the seal lips can aid in installation and initial operation. Follow vehicle-specific service manual instructions for torque specifications and installation procedures.

Quality Assurance and Warranty

Timken manufactures the 4278 Differential Pinion Seal to meet or exceed OEM standards for durability and performance. This part undergoes rigorous quality control to ensure a precise fit and reliable sealing capability. While specific warranty details may vary, Timken products typically come with a limited warranty against defects in materials and workmanship, providing confidence in the product's longevity and function.

This part fits 265 vehicles. Search below:

YearMakeModelDrive TypePositionNotes
2024FordF-150RWDRear
2024FordMustangRWDRear
2024FordTransit-150RWDRear
2024FordTransit-250RWDRear
2024FordTransit-350RWDRear
2024FordTransit-350 HDRWDRear
2024LincolnNavigatorRear
2023FordF-150RWDRear
2023FordMustangRWDRear
2023FordTransit-150RWDRear
2023FordTransit-250RWDRear
2023FordTransit-350RWDRear
2023FordTransit-350 HDRWDRear
2023LincolnNavigatorRear
2022FordF-150RWDRear
2022FordMustangRWDRear
2022FordTransit-150RWDRear
2022FordTransit-250RWDRear
2022FordTransit-350RWDRear
2022FordTransit-350 HDRWDRear
2022LincolnNavigatorRear
2021FordF-150RWDRear
2021FordMustangRWDRear
2021FordTransit-150RWDRear
2021FordTransit-250RWDRear
2021FordTransit-350RWDRear
2021FordTransit-350 HDRWDRear
2021LincolnNavigatorRear
2020FordExpeditionRear
2020FordF-150Rear
2020FordMustangRear
2020FordTransit-150RWDRear
2020FordTransit-250RWDRear
2020FordTransit-350RWDRear
2020FordTransit-350 HDRWDRear
2020LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2019FordExpeditionRear
2019FordF-150Rear
2019FordMustangRear
2019FordTransit-150Rear
2019FordTransit-250Rear
2019FordTransit-350Rear
2019FordTransit-350 HDRear
2019LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2018FordExpeditionRear
2018FordF-150Rear
2018FordMustangRear
2018FordTransit-150Rear
2018FordTransit-250Rear
2018FordTransit-350Rear
2018FordTransit-350 HDRear
2018LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2017FordExpeditionRear
2017FordF-150Rear
2017FordMustangRear
2017FordTransit-150Rear
2017FordTransit-250Rear
2017FordTransit-350Rear
2017FordTransit-350 HDRear
2017LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2016FordExpeditionRear
2016FordF-150Rear
2016FordMustangRear
2016FordTransit-150Rear
2016FordTransit-250Rear
2016FordTransit-350Rear
2016FordTransit-350 HDRear
2016LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2015FordExpeditionRear
2015FordF-150Rear
2015FordMustangRear
2015FordTransit-150Rear
2015FordTransit-250Rear
2015FordTransit-350Rear
2015FordTransit-350 HDRear
2015LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2014FordExpeditionRear
2014FordF-150Rear
2014FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2014LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2013FordExpeditionRear
2013FordF-150Rear
2013FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2013LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2012FordExpeditionRear
2012FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2012FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2012LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2011FordExpeditionRear
2011FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2011FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2011FordF-250 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2011LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2010FordExpeditionRear
2010FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2010FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2010FordF-250 Super DutyRear
2010FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2010LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2009FordExpeditionRear
2009FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2009FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2009FordF-250 Super DutyRear
2009FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2009LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2008FordE-250RearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2008FordExpeditionRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2008FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2008FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2008FordF-150RearNon-Limited Slip Differential with a Ring Gear size of 10.25 inches.
2008FordF-150Rear10.25 in. Ring Gear Differential Pinion Race
2008FordF-250 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2008FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2008LincolnMark LTRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2008LincolnMark LTRear10.25 in. Ring Gear Differential Pinion Race
2008LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2007FordE-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2007FordE-250RearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2007FordExpeditionRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2007FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2007FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2007FordF-150RearNon-Limited Slip Differential with a Ring Gear size of 10.25 inches.
2007FordF-250 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2007FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2007FordF-350 Super DutyRear OuterDual Rear Wheels - Narrow Frame
2007LincolnMark LTRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2007LincolnMark LTRear10.25 in. Ring Gear Differential Pinion Race
2007LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2006FordE-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2006FordExpeditionRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2006FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2006FordF-150RearNon-Limited Slip Differential with a Ring Gear size of 10.25 inches.
2006FordF-250 Super DutyRear
2006FordF-350 Super DutyRear OuterDual Rear Wheels - Narrow Frame
2006FordF-350 Super DutyRear
2006FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2006LincolnMark LTRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2006LincolnMark LTRear10.25 in. Ring Gear Differential Pinion Race
2006LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2006LincolnNavigatorRear10.25 in. Ring Gear Differential Pinion Race
2005FordE-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2005FordE-150 Club WagonRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2005FordE-350 Club WagonRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2005FordE-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2005FordExcursionRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2005FordExpeditionRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2005FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2005FordF-150RearNon-Limited Slip Differential with a Ring Gear size of 10.25 inches.
2005FordF-250 Super DutyRear
2005FordF-350 Super DutyRear OuterDual Rear Wheels - Narrow Frame
2005FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2005LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2004FordE-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2004FordE-150 Club WagonRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2004FordE-350 Club WagonRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2004FordE-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2004FordExcursionRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2004FordExpeditionRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2004FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2004FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2004FordF-150RearNon-Limited Slip Differential with a Ring Gear size of 10.25 inches.
2004FordF-150Rear10.25 in. Ring Gear Differential Pinion Race
2004FordF-150 HeritageRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2004FordF-150 HeritageRearNon-Limited Slip Differential with a Ring Gear size of 10.25 inches.
2004FordF-250 Super DutyRearNon Dana Axle
2004FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2004FordF-350 Super DutyRear OuterNon Dana Axle
2004LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2003FordE-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2003FordE-150 Club WagonRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2003FordE-350 Club WagonRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2003FordExcursionRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2003FordExpeditionRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2003FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2003FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2003FordF-150Rear10.25 in. Ring Gear Differential Pinion Race
2003FordF-250 Super DutyRearNon Dana Axle
2003FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2003FordF-350 Super DutyRear OuterNon Dana Axle
2003LincolnAviatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2003LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2002FordE-150 EconolineRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2002FordE-150 Econoline Club WagonRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2002FordE-350 Econoline Club WagonRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2002FordExcursionRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2002FordExpeditionRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2002FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2002FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2002FordF-150Rear10.25 in. Ring Gear Differential Pinion Race
2002FordF-250 Super DutyRearNon Dana Axle
2002FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2002FordF-350 Super DutyRear OuterNon Dana Axle
2002LincolnBlackwoodRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2002LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2001FordE-150 EconolineRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2001FordE-150 Econoline Club WagonRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2001FordE-350 Econoline Club WagonRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2001FordExcursionRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2001FordExpeditionRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2001FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2001FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2001FordF-150Rear10.25 in. Ring Gear Differential Pinion Race
2001FordF-250 Super DutyRearNon Dana Axle
2001FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2001FordF-350 Super DutyRear OuterNon Dana Axle
2001LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2000FordE-150 EconolineRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2000FordE-150 Econoline Club WagonRearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2000FordE-350 Econoline Club WagonRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2000FordExcursionRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2000FordExpeditionRearFits 9.75" Ring Gear for Differential Pinion Bearing.
2000FordF-150RearFor Non-Limited Slip Differentials with a 9.75" Ring Gear.
2000FordF-150RearFits 9.75" Ring Gear for Differential Pinion Bearing.
2000FordF-150Rear10.25 in. Ring Gear Differential Pinion Race
2000FordF-250 Super DutyRearNon Dana Axle
2000FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
2000FordF-350 Super DutyRear OuterNon Dana Axle
2000LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
1999FordE-350 Econoline Club WagonRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
1999FordF-350 Super DutyRearFits vehicles with 10.5 inch Ring Gear and Automatic Transmission Output Shaft Bearing.
1999LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
1998FordE-250 EconolineRear10.5 in. Ring Gear - From 1/1998
1998FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1998FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1998FordF-250Rear10.5 in. Ring Gear - From 1/1998
1998LincolnNavigatorRearFits 9.75" Ring Gear for Differential Pinion Bearing.
1997FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1997FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1997FordF-350Rear10.25 in., 10.5 in. Ring Gear
1996FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1996FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1996FordF-350Rear10.25 in., 10.5 in. Ring Gear
1995FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1995FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1995FordF-350Rear10.25 in., 10.5 in. Ring Gear
1994FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1994FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1994FordF-350Rear10.25 in., 10.5 in. Ring Gear
1993FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1993FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1993FordF-350Rear10.25 in., 10.5 in. Ring Gear
1992FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1992FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1992FordF-350Rear10.25 in., 10.5 in. Ring Gear
1991FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1991FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1991FordF-350Rear10.25 in., 10.5 in. Ring Gear
1990FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1990FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1990FordF-350Rear10.25 in., 10.5 in. Ring Gear
1989FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1989FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1989FordF-350Rear10.25 in., 10.5 in. Ring Gear
1988FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1988FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1988FordF-350Rear10.25 in., 10.5 in. Ring Gear
1987FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1987FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1987FordF-350Rear10.25 in., 10.5 in. Ring Gear
1986FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1986FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1986FordF-350Rear10.25 in., 10.5 in. Ring Gear
1985FordE-350 EconolineRear10.25 in., 10.5 in. Ring Gear
1985FordE-350 Econoline Club WagonRear10.25 in., 10.5 in. Ring Gear
1985FordF-350Rear10.25 in., 10.5 in. Ring Gear

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.