Timken 3188S Differential Pinion Bearing - Rear Inner

Timken Differential Pinion Bearing 3188S

The Timken 3188S differential pinion bearing is a tapered roller bearing built for driveline service where both radial and axial loads must be managed. It is a direct replacement bearing for select applications and is engineered for compact packaging with durable performance.

Key Features

• Tapered roller bearing design for combined radial and axial load capacity
• Built for higher operating speeds and heavier load conditions
• Compact bearing construction for efficient driveline packaging
• Timken engineering and technical support behind the design
• Part number 3188S for accurate ordering and service matching

Detailed Description

Timken 3188S is a differential pinion bearing used in rear inner driveline applications where precise support and load control are critical. As a tapered roller bearing, it is designed to handle thrust and radial forces together, which is important in differential assemblies that see continuous rotation and load transfer. This part number 3188S is listed for Fits 1963-1967 MG MGB, rear inner, including banjo type differential and tube type differential, and Fits 1976-1977 TVR 2500M, rear inner. Timken 3188S is also cross-referenced to Timken 3188S for the same application.

For MG MGB and TVR 2500M driveline service, this bearing supports the pinion assembly where wear can affect gear mesh, noise, and smooth operation. Timken’s tapered roller bearing construction is intended for durability in a compact space, making it suitable for differential rebuild work that requires accurate bearing selection.

What It Is Used For

• Excessive differential noise from worn pinion bearings
• Loose or inconsistent pinion support during rebuilds
• Wear-related driveline vibration
• Restoring proper bearing preload and gear alignment
• Service replacement during differential overhaul

Installation Notes and Tips

Replace the inner cone and outer cup at the same time to maximize reliability and service life. Verify differential type and application details before installation, especially on MG MGB banjo type and tube type differential setups. Confirm the bearing matches the required pinion position before assembly.

Quality Assurance

Timken is recognized globally for tapered roller bearing engineering and application support. The 3188S is built to meet the demands of driveline service where load capacity and durability matter.