SKF 21072A Differential Pinion Seal - Rear

SKF Differential Pinion Seal 21072A

SKF 21072A is a differential pinion seal built for rear axle service on select Chevrolet Colorado and GMC Canyon applications. With a 2.106 shaft diameter and HMSA57 seal design, it is specified to help maintain proper lubricant retention at the pinion while keeping road contaminants out.

Key Features

• Part number 21072A for differential pinion seal replacement
• HMSA57 seal type for rear driveline sealing applications
• 2.106 shaft diameter for the specified axle interface
• 0.413 width for a precise sealing profile
• Engineered by SKF using premium sealing materials
• Fits 2018-2020 Chevrolet Colorado, rear
• Fits 2018-2020 GMC Canyon, rear

Detailed Description

SKF 21072A is a rear differential pinion seal designed for vehicles that need dependable sealing at the pinion shaft. SKF has a long history in seal engineering, and this part reflects that focus with a design built around application-specific dimensions and material selection. For 2018-2020 Chevrolet Colorado and 2018-2020 GMC Canyon rear axle service, this seal helps maintain the lubricant barrier where the pinion enters the differential housing. This part cross-references Monroe Shocks & Struts (e.g., 84053572) for the same application.

What It Helps Address

• Gear oil seepage at the rear differential pinion
• Contamination entering the pinion seal area
• Seal wear from age, mileage, or heat exposure
• Noise or driveline concerns related to low lubricant level
• Service replacement after differential maintenance

Installation Notes and Tips

Confirm the axle application before installation and match the seal dimensions to the original part. Inspect the pinion yoke, sealing surface, and surrounding housing for wear or scoring before installing SKF 21072A. Clean the bore thoroughly and verify proper alignment during installation to help the seal seat evenly. For 2018-2020 Chevrolet Colorado and GMC Canyon rear differential service, follow the vehicle service procedure and torque specifications for the pinion assembly.

Quality Assurance

SKF designs and manufactures seals to high quality standards, using premium materials and application-specific construction to support long service life and reliable sealing performance.