Timken LM48548 Manual Transmission Countershaft Bearing - Front, Front Outer or Rear

Manual Transmission Countershaft Bearing for Select Applications

Timken LM48548 is a manual transmission countershaft bearing built for applications that need controlled support under radial and axial load. It is a tapered roller bearing component engineered for compact packaging, durability, and stable operation in demanding drivetrain service.

Compatible With 2004-2006 Cadillac CTS front, as well as select Jaguar clutch applications and rear axle applications on Chevrolet Monza, Oldsmobile Starfire, and Pontiac Sunbird models.

Key Features

• Manual transmission countershaft bearing application
• Tapered roller bearing design for radial and axial load management
• Built for higher operating speeds and heavier load conditions
• Compact design supports durability in limited space
• Timken LM48548 cross-references National LM48548

Detailed Description

Timken LM48548 is a tapered roller bearing used in manual transmission countershaft service where load control and long-term reliability matter. Timken’s bearing engineering focuses on handling both radial and axial forces, which is important in drivetrain assemblies that see continuous rotation and changing load direction. This part number, LM48548, is also listed as a National LM48548 interchange for the same application.

Fitment includes 2004-2006 Cadillac CTS, front; 1984-1987 Jaguar XJ12, front, clutch; 1985-1987 Jaguar XJ6, front, clutch; 1986 Jaguar XJS, front, clutch; 1975-1977 Chevrolet Monza, rear, 6.5 inch ring gear; 1976-1977 Oldsmobile Starfire, rear, 6.5 inch ring gear; and 1976-1977 Pontiac Sunbird, rear, 6.5 inch ring gear. If you are servicing a Cadillac CTS, Jaguar XJ6, or Pontiac Sunbird drivetrain, confirm the bearing location and application details before installation.

What It Helps Address

• Transmission bearing noise from worn rollers or race surfaces
• Excessive drivetrain play caused by bearing wear
• Rough shifting related to countershaft support issues
• Load instability in manual transmission assemblies
• Premature wear in high-load rotating components

Installation Notes and Tips

Inspect the mating cone and cup before installation, and replace both sides of the tapered roller bearing set at the same time to maintain reliability and service life. Clean the housing thoroughly, verify correct orientation, and confirm the vehicle’s transmission or axle configuration matches the listed fitment for LM48548.

Quality Assurance

Timken is recognized for tapered roller bearing engineering and drivetrain component support. LM48548 is built to meet the load-handling demands of manual transmission and related bearing applications.