ACDelco 87861099 Differential Drive Pinion Gear Seal

The ACDelco 87861099 is a differential drive pinion gear seal designed to prevent lubricant leakage from the differential housing where the pinion shaft extends through the case. This seal creates a critical barrier between the rotating pinion shaft and the stationary differential housing, maintaining proper fluid levels and protecting internal components from contamination.

Key Features:

• Precision-engineered seal design for reliable sealing performance
• Prevents differential fluid loss and contamination ingress
• Durable construction for extended service life
• Direct replacement for worn or leaking original equipment seals
• ACDelco quality manufacturing standards

Regular inspection and replacement of the differential pinion seal is essential for maintaining proper differential function and preventing costly damage to ring and pinion gears. A failing pinion seal may exhibit symptoms such as visible fluid leaks near the pinion yoke, low differential fluid levels, or whining noises from the rear axle.