USA Standard Gear 30121 Pinion Seal for Chrysler 8.75" Rear Differential

The USA Standard Gear 30121 is a precision-engineered pinion seal designed for Chrysler 8.75" (8 3/4") rear differentials with '41' and '89' case housings. This critical component prevents gear oil leakage from the differential housing where the pinion yoke passes through, maintaining proper lubrication for your ring and pinion gears.

Key Features:

• Precision fit for Chrysler 8.75" rear differentials with '41' and '89' case housings
• Steel construction with rubber sealing element for reliable, long-lasting performance
• 2.813" outer diameter (OD) housing bore fitment
• 1.875" inner diameter (ID) sealing surface for pinion yoke
• Essential replacement component during differential service or pinion yoke removal
• Prevents differential fluid leaks and contamination

This pinion seal is a must-have replacement part when servicing your Chrysler 8.75" differential, whether you're performing a complete rebuild, changing gear ratios, or replacing a worn pinion yoke. The 8.75" Chrysler rear end was used in numerous Dodge, Plymouth, and Chrysler vehicles from the 1960s through early 1970s and remains popular in classic Mopar muscle cars and custom builds. USA Standard Gear provides quality drivetrain components engineered to meet or exceed OEM specifications.