Yukon pinion seal designed to fit Gearworks pinion supports is a direct replacement for Ford 9‑inch applications using that pinion support. The F9 pinion seal is specified to match Gearworks support dimensions and is offered as a precision replacement part from Yukon, which supplies a broad range of small differential components to complete service and rebuild jobs where Gearworks pinion supports are used.
Yukon Gear Pinion Seal for Gear Works Pinion Support