Timken SET309 Differential Pinion Bearing Set - Front Outer

Timken SET309 Differential Pinion Bearing Set

Timken SET309 is a differential pinion bearing set built for front outer applications that demand accurate load control and smooth rotation. It is a tapered roller bearing solution for the Ford Explorer, Ford Explorer Sport Trac, and Mercury Mountaineer in the listed fitments.

Key Features

• Tapered roller bearing design for managing radial and axial loads
• Cup outside diameter: 2.531 in. / 64.29 mm
• Cone inside diameter: 1.187 in. / 30.16 mm
• Cup width: 0.656 in. / 16.67 mm
• Cone radius: 0.059 in. / 1.50 mm
• Bearing cup radius: 0.06 in. / 1.500 mm
• Timken SET309 cross-references M86649-M86610 for the same application

Detailed Description

Timken SET309 is engineered as a differential pinion bearing set for front outer driveline service. Timken tapered roller bearing components are known for handling combined radial and axial loads in a compact package, which is important in differential assemblies where bearing preload, alignment, and durability affect driveline performance. This part number is used in 2006-2010 Ford Explorer front outer applications, 2007-2010 Ford Explorer Sport Trac front outer applications, and 2006-2010 Mercury Mountaineer front outer applications. If you are servicing a Ford Explorer, Ford Explorer Sport Trac, or Mercury Mountaineer differential, SET309 provides the dimensional match needed for proper bearing replacement.

What It Helps Address

• Front differential bearing noise
• Excessive pinion play or looseness
• Rough rotation in the pinion support area
• Wear from combined radial and axial loading
• Service replacement for worn front outer bearing components

Installation Notes and Tips

Replace the inner cone and outer cup together to maintain bearing reliability and service life. Verify all dimensions and the vehicle application before installation, and set bearing preload and gear contact according to the service procedure for the axle assembly. For fitment, this part fits 2006-2010 Ford Explorer, front outer; fits 2007-2010 Ford Explorer Sport Trac, front outer; and fits 2006-2010 Mercury Mountaineer, front outer.

Quality Assurance

Timken is a recognized global leader in tapered roller bearings, with engineering support focused on durability and load management for drivetrain service. SET309 reflects that bearing expertise in a differential pinion application.