Timken NP673386 Differential Pinion Race - Rear Inner or Rear Outer

Brand Timken NP673386
Position Rear Inner
Fits Ram and Ford · 65 vehicles

Tapered roller bearing. Engineered for higher speeds, heavier loads, and longer life.

Radial and axial loads. Built to manage both for dependable performance.

Replace cone and cup. Maximize reliability and service life.

Cross-references Schaeffler NP673386 for the same application. See all 1.

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Timken NP673386 Differential Pinion Race

The Timken NP673386 differential pinion race is a tapered roller bearing cup built for rear axle service in heavy-duty Ford and Ram applications. It is engineered for high load capacity, stable operation, and long service life in driveline and axle assemblies.

Key Features

  • Timken tapered roller bearing component for differential pinion support
  • Handles both radial and axial loads in rear axle service
  • Built for heavy-duty driveline use in Ford F-350 Super Duty and Ram 2500 applications
  • Use with the matching cone/inner bearing component for proper service
  • Cross-references Schaeffler NP673386 for the same application

Detailed Description

Timken NP673386 is a differential pinion race used in rear inner and rear outer axle positions, depending on the vehicle application. It is a fit for 1999-2020 Ford F-350 Super Duty, 2004-2008 Ford E-350 Super Duty, 1999-2004 Ford E-350 Econoline Club Wagon, 2000-2004 Ford F-350 Super Duty, 2000 Ford F-250 Super Duty, and select Ram 1500 and Ram 2500 rear inner applications. This part number is also searched as NP673386 for axle bearing service on Ford F-350 Super Duty and Ram 2500 trucks.

As a Timken tapered roller bearing component, this race is made for compact packaging while carrying demanding loads in differential assemblies. It is a direct service part for rear axle bearing repair where the pinion race shows wear, scoring, or heat damage.

What It Is Used For

  • Replacing a worn or damaged differential pinion race
  • Correcting axle noise caused by bearing wear
  • Restoring proper pinion bearing support in rear axle service
  • Addressing rough operation from pitting, spalling, or overheating
  • Supporting differential rebuilds on Ford and Ram heavy-duty trucks

Installation Notes and Tips

Replace the inner cone and outer cup together to maintain bearing geometry and service life. Confirm axle type, ring gear size, and rear inner or rear outer position before installation. Clean the bearing bore and inspect the pinion shaft and related components for wear before assembly.

Quality Assurance

Timken is a recognized global leader in tapered roller bearings, with engineering focused on durability, load handling, and long service life in driveline applications. The NP673386 follows that bearing design approach for demanding axle service.

This part fits 65 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelPositionNotes
2020Ram2500Rear Inner
2019Ram2500Rear Inner
2018Ram2500Rear Inner
2017Ram2500Rear Inner
2016FordF-350 Super DutyRear InnerCompatible with vehicles equipped with dual rear wheels.
2016Ram2500Rear Inner
2015FordF-350 Super DutyRear InnerCompatible with vehicles equipped with dual rear wheels.
2015Ram2500Rear Inner
2014FordF-350 Super DutyRear InnerCompatible with vehicles equipped with dual rear wheels.
2014Ram2500Rear Inner
2013FordF-350 Super DutyRear InnerCompatible with vehicles equipped with dual rear wheels.
2013Ram2500Rear Inner11.5 in. Ring Gear
2012FordF-350 Super DutyRear InnerCompatible with vehicles equipped with dual rear wheels.
2012Ram1500Tradesman HDRear Inner11.5 in Ring Gear
2012Ram2500Rear Inner11.5 in. Ring Gear
2011FordF-350 Super DutyRear InnerCompatible with vehicles equipped with dual rear wheels.
2010FordF-350 Super DutyRear InnerCompatible with vehicles equipped with dual rear wheels.
2010FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2009FordF-350 Super DutyRear InnerCompatible with vehicles equipped with dual rear wheels.
2009FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2008FordE-350 Super DutyRear InnerDana/Spicer 80 Axle
2008FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2008FordF-350 Super DutyRear OuterDual Rear Wheels - Wide Frame
2007FordE-350 Super DutyRear InnerDana/Spicer 80 Axle
2007FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2007FordF-350 Super DutyRear OuterDual Rear Wheels - Wide Frame
2006FordE-350 Super DutyRear InnerDana/Spicer 80 Axle
2006FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2006FordF-350 Super DutyRear OuterDual Rear Wheels - Wide Frame
2006FordF-350 Super DutyRear Inner11.25 in. Ring Gear
2005FordE-350 Club WagonRear InnerDana/Spicer 80 Axle
2005FordE-350 Super DutyRear InnerDana/Spicer 80 Axle
2005FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2005FordF-350 Super DutyRear OuterDual Rear Wheels - Wide Frame
2004FordE-350 Club WagonRear InnerDana/Spicer 80 Axle
2004FordE-350 Super DutyRear InnerDana/Spicer 80 Axle
2004FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2004FordF-350 Super DutyRear InnerDana Axle
2003FordE-350 Club WagonRear InnerDana/Spicer 80 Axle
2003FordE-350 Club WagonRear Inner11.25 in. Ring Gear
2003FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2003FordF-350 Super DutyRear Inner11.25 in. Ring Gear
2003FordF-350 Super DutyRear InnerDana Axle
2002FordE-250 EconolineRear InnerDana Axle
2002FordE-350 Econoline Club WagonRear InnerDana/Spicer 80 Axle
2002FordE-350 Econoline Club WagonRear Inner11.25 in. Ring Gear
2002FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2002FordF-350 Super DutyRear Inner11.25 in. Ring Gear
2002FordF-350 Super DutyRear InnerDana Axle
2001FordE-250 EconolineRear InnerDana Axle
2001FordE-350 Econoline Club WagonRear InnerDana/Spicer 80 Axle
2001FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2001FordF-350 Super DutyRear Inner11.25 in. Ring Gear
2001FordF-350 Super DutyRear InnerDana Axle
2000FordE-250 EconolineRear InnerDana Axle
2000FordE-350 Econoline Club WagonRear InnerDana/Spicer 80 Axle
2000FordE-350 Econoline Club WagonRear Inner11.25 in. Ring Gear
2000FordF-250 Super DutyRear InnerDana Axle
2000FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
2000FordF-350 Super DutyRear Inner11.25 in. Ring Gear
2000FordF-350 Super DutyRear InnerDana Axle
1999FordE-350 Econoline Club WagonRear InnerDana/Spicer 80 Axle
1999FordE-350 Econoline Club WagonRear Inner11.25 in. Ring Gear
1999FordF-350 Super DutyRear InnerDana/Spicer 80 Axle
1999FordF-350 Super DutyRear Inner11.25 in. Ring Gear
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Schaeffler — NP673386