SKF 21395A Differential Pinion Seal - Rear

SKF Rear Differential Pinion Seal

Restore sealing performance at the rear axle with this SKF differential pinion seal, part number 21395A. It is built for the rear pinion area and uses a polyacrylate sealing surface to help maintain lubricant control where the driveshaft meets the differential.

Compatible With Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, GMC Savana 3500, Chevrolet Silverado 1500, Chevrolet Tahoe, GMC Sierra 1500, GMC Yukon, GMC Yukon XL, Cadillac Escalade, Cadillac Escalade ESV, and GMC Yukon XL 1500 rear axle applications listed below.

Key Features

• SKF differential pinion seal for rear axle service
• Polyacrylate sealing surface for the shaft contact area
• Outside diameter: 3.197 in.
• Shaft diameter: 2.146 in.
• Width: 0.571 in.
• Engineered for rear pinion sealing applications
• Part number 21395A for ordering and cross-reference use

Application Details

This SKF 21395A seal is used at the rear differential pinion to help keep gear oil inside the axle housing and road contaminants out. SKF has a long history in seal design and uses application-specific materials and bonding methods to match the demands of the operating environment. This part cross-references 22943111 for the same application.

Fits 2020-2022 Chevrolet Express 2500, rear.
Fits 2020-2022 Chevrolet Express 3500, rear.
Fits 2020-2022 GMC Savana 2500, rear.
Fits 2020-2022 GMC Savana 3500, rear.
Fits 2014-2020 Chevrolet Silverado 1500, rear, 9.75" ring gear.
Fits 2014-2020 Chevrolet Silverado 1500, rear, 9.50" ring gear.
Fits 2014-2020 Chevrolet Tahoe, rear, 9.75" ring gear.
Fits 2014-2020 Chevrolet Tahoe, rear, 9.50" ring gear.
Fits 2014-2020 GMC Sierra 1500, rear, 9.75" ring gear.
Fits 2014-2020 GMC Sierra 1500, rear, 9.50" ring gear.
Fits 2014-2020 GMC Yukon, rear, 9.75" ring gear.
Fits 2014-2020 GMC Yukon, rear, 9.50" ring gear.
Fits 2015-2020 GMC Yukon XL, rear, 9.75" ring gear.
Fits 2015-2020 GMC Yukon XL, rear, 9.50" ring gear.
Fits 2015-2016 Cadillac Escalade, rear, 9.75" ring gear.
Fits 2015-2016 Cadillac Escalade, rear, 9.50" ring gear.
Fits 2015-2016 Cadillac Escalade ESV, rear, 9.75" ring gear.
Fits 2015-2016 Cadillac Escalade ESV, rear, 9.50" ring gear.
Fits 2014 GMC Yukon XL 1500, rear, 9.75" ring gear.

Common Repair Uses

• Rear differential pinion seal leak repair
• Gear oil seepage at the pinion area
• Contamination entering the rear axle housing
• Noise or wear concerns tied to low lubricant level
• Service work on rear axle sealing surfaces

Installation Notes

Inspect the pinion yoke and sealing surface before installation, and replace any worn or grooved components as needed. Clean the axle housing bore thoroughly so the seal seats evenly, and verify the seal orientation before pressing it into place. Confirm axle and ring gear configuration before ordering, especially on Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Tahoe rear applications.

Quality Assurance

SKF designs and manufactures seals to specific application requirements using premium materials and controlled bonding methods. The brand’s seal engineering history and manufacturing standards support long service life in driveline sealing applications.