National NP101912 Differential Pinion Race - Rear Inner

National NP101912 Differential Pinion Race

National NP101912 is a differential pinion race for rear inner applications in select Chevrolet Corvette and Cadillac XLR driveline assemblies. It is built from premium-grade steel and uses a crowned raceway profile to promote even load distribution in service.

Key Features

• Premium-grade steel construction for differential bearing service
• Crowned raceway design helps distribute load evenly
• Rear inner differential pinion race application
• Direct-fit replacement for select Corvette and XLR axle configurations
• National NP101912 part number for accurate ordering and service matching

Detailed Description

This differential pinion race is used in rear inner bearing locations on select Chevrolet Corvette and Cadillac XLR models. Fitment includes 1997-2011 Chevrolet Corvette, rear inner, with 8.4646 in ring gear and Getrag 625 axle; 2006-2011 Chevrolet Corvette, rear inner, with 8.6614 in ring gear and Getrag 626 axle; 2012-2013 Chevrolet Corvette, rear inner, with 8.6614 in ring gear and GKN626 axle; 2004-2005 Cadillac XLR, rear inner, with 8.4646 in ring gear and Getrag 625 axle; and 2006-2009 Cadillac XLR, rear inner, with 8.6614 in ring gear and Getrag 625 axle. National NP101912 is a service part for driveline repair where precise bearing support is required.

This part cross-references 12458130 - B for the same application.

What It Helps Address

• Noise from worn differential pinion bearing surfaces
• Rough operation in the rear differential assembly
• Excessive wear at the pinion bearing race location
• Service replacement needs during Corvette or XLR driveline repair

Installation Notes and Tips

Verify ring gear size, axle type, and rear inner position before installation. This part is application-specific, so confirm the vehicle configuration against the listed Corvette and XLR fitment details. Proper bearing installation practices and differential setup procedures are important for correct operation.

Quality Assurance

National manufactures this race from premium-grade steel and uses crowned raceways to support even load distribution across the bearing surface.