Parts Master PMM86610 Differential Pinion Bearing Cup Race M86610

The Parts Master PMM86610 is a replacement differential pinion bearing cup (race), also known by the industry-standard cross-reference number M86610. This tapered roller bearing cup serves as the outer ring in a tapered roller bearing assembly, providing the precision-machined raceway surface that the tapered rollers ride against inside the differential housing.

Key Features:

• Differential pinion bearing cup (outer race/cup) for tapered roller bearing applications
• 2.531-inch outside diameter for precise housing fit
• Designed to work with the M86649 bearing cone (inner race)
• Precision-machined raceway surface for smooth, low-friction operation
• Engineered to handle both radial and axial (thrust) loads
• Meets or exceeds OE specifications for fit, form, and function
• Sold individually

Tapered roller bearing cups should always be replaced together with their corresponding bearing cone — never reuse an old cup with a new cone, as microscopic wear patterns will reduce bearing life and performance. The Parts Master PMM86610 is a direct-fit OE-style replacement suitable for rear differential pinion applications across a wide range of domestic and import vehicles.

Cross-Reference Numbers: M86610, PMM86610