National 99253 Differential Pinion Repair Sleeve - Rear Outer

National 99253 Differential Pinion Repair Sleeve

National 99253 is a stainless steel differential pinion repair sleeve for rear outer applications that need a precise sealing surface restoration. It is sized for a 2.500-inch shaft with a 2.820-inch flanged outside diameter, making it a practical repair part for driveline service on heavy-duty trucks and vans.

Key Features

• Stainless steel construction for a durable repair surface
• Repair sleeve design for restoring worn pinion seal areas
• Shaft size: 2.500 in. with 2.497-2.503 in. allowable range
• Flanged outside diameter: 2.820 in.
• Installation depth: 0.890 in.
• Overall width: 0.650 in.; width on shaft: 0.555 in.
• National 99253 cross-references Timken KWK99253 and 99253RS, 3906080

Detailed Description

This differential pinion repair sleeve is used to restore the sealing area on a worn pinion shaft so the seal can ride on a smoother surface. National 99253 is built from stainless steel and measures 0.650 inch overall width with a 0.555 inch width on shaft, giving it the dimensions needed for a controlled repair on the rear outer pinion area. It is a direct-fit style repair sleeve for applications such as Dodge Ram 2500, Dodge Ram 3500, Chevrolet C3500, GMC C3500, Ford F-350 Super Duty, Chevrolet P30, and GMC P3500 where the axle and ring gear specifications match the listed fitment.

National has supplied sealing solutions for more than 75 years, and this part reflects that focus on dimensional accuracy and serviceability. The National 99253 part number is also useful when cross-referencing replacement needs during axle and differential repair work.

Vehicle Fitment

• Fits 2001 Dodge Ram 3500, rear outer, 1st Design; with 11 mm ring gear; with Spicer 80 axle.
• Fits 1992-2000 Chevrolet C3500, rear outer, with 11 mm ring gear and Spicer 80 axle.
• Fits 1994-2000 Dodge Ram 2500, rear outer, with 11 mm ring gear and Spicer 80 axle.
• Fits 1994-2000 Dodge Ram 3500, rear outer, with 11 mm ring gear and Spicer 80 axle.
• Fits 1999-2000 Ford F-350 Super Duty, rear outer, with 11 mm ring gear and Spicer 80 axle.
• Fits 1992-2000 GMC C3500, rear outer, with 11 mm ring gear and Spicer 80 axle.
• Fits 1989-1999 Chevrolet P30, rear outer, with 11 mm ring gear and Spicer 80 axle.
• Fits 1989-1999 GMC P3500, rear outer, with 11 mm ring gear and Spicer 80 axle.

Common Repair Uses

• Worn pinion seal surface causing gear oil seepage
• Grooved or scored shaft area where the seal rides
• Repeat differential leaks after seal replacement
• Restoration work on rear outer pinion sealing surfaces
• Service repairs on Spicer 80 axle applications

Installation Notes and Tips

Verify shaft diameter before installation; this sleeve is specified for a 2.500-inch shaft with a 2.497-2.503 inch range. Confirm the axle configuration, ring gear size, and rear outer application before ordering, especially on Dodge Ram 2500, Dodge Ram 3500, and Ford F-350 Super Duty service jobs. Clean the shaft thoroughly and inspect the sealing surface for wear before pressing the sleeve into place.

Quality Assurance

National is known for premium sealing solutions and ongoing product development for modern vehicle service needs. National 99253 is a stainless steel repair sleeve engineered to support accurate differential pinion seal restoration in the listed applications.