BCHD PT8622 Differential Pinion Seal - Front Outer

Overview

The PT8622 differential pinion seal is a sealing component for front outer applications on compatible Chevrolet and GMC 4x4 driveline setups with an 8.5-inch ring gear. It is used in the differential assembly to help retain lubricant at the pinion area and keep the housing sealed.

Compatible With Chevrolet Blazer, GMC Jimmy, Chevrolet Suburban, and GMC Suburban applications across multiple 1977-1994 model years. The PT8622 is also a fitment match for Chevrolet K10, K20, K5 Blazer, and GMC K-series trucks with the same axle configuration.

Key Features

• Front outer differential pinion seal for 8.5-inch ring gear applications.
• Direct fitment coverage for a wide range of Chevrolet and GMC 4x4 models.
• Helps maintain differential fluid containment at the pinion area.
• Supports service replacement on axle assemblies with the specified configuration.

Detailed Description

PT8622 is a differential pinion seal built for front outer use on compatible Chevrolet and GMC vehicles equipped with an 8.5-inch ring gear. Fitment includes Chevrolet Blazer, K5 Blazer, K10, K20, V10, V20, and Suburban models, along with GMC Jimmy, K15, K25, K1500, K2500, and Suburban variants listed in the fitment data. Use PT8622 when replacing a worn or leaking pinion seal in the specified differential assembly.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Is Used For

• Stopping gear oil seepage at the pinion seal area.
• Replacing a seal that has hardened, cracked, or worn over time.
• Addressing fluid loss around the differential pinion shaft.
• Restoring sealing performance after differential service.

Installation Notes and Tips

Verify the axle configuration, ring gear size, and front outer position before ordering. Clean the sealing surface thoroughly and inspect the pinion yoke and surrounding components for wear before installing the new seal. Confirm the vehicle application against the fitment list for Chevrolet and GMC models before service.

Quality Assurance

Fitment is defined by the listed vehicle applications and axle configuration. Confirm PT8622 against the differential specifications for your Chevrolet or GMC truck or SUV before installation.