9in Gear Full Spool 6.50 Ratio New Center Section

The PEM 9in Gear Full Spool 6.50 Ratio New Center Section is a precision differential component designed for serious off-road and high-performance truck builds. This full spool replaces the factory open or limited-slip differential in 9-inch Ford axle assemblies, delivering maximum traction and lockup under acceleration. Built for enthusiasts who demand reliable power delivery on trails, drag strips, or in competitive off-road environments, this center section transforms driveline behavior and eliminates differential slip entirely.

A full spool is a solid, one-piece differential carrier that locks both axle shafts together at all times, ensuring identical rotational speed regardless of terrain or load. The 6.50 gear ratio enhances acceleration, making it ideal for short-wheelbase vehicles or applications where aggressive acceleration is prioritized. This new center section is designed to be a complete, ready-to-install assembly that bolts directly into existing 9-inch housings, simplifying installation.

This center section is suitable for lifted trucks, rock crawlers, desert runners, and drag-strip competitors who prioritize traction over on-highway manners. Its solid construction eliminates the need for side gears and spider gears, reducing complexity while maximizing durability under extreme stress. The PEM 9in Gear Full Spool is an essential upgrade for those looking to enhance their vehicle's performance in demanding conditions.