The Ford 1C3Z-6375-AA is the factory clutch flywheel for a 1999–2003 7.3 with a ZF6. It is the manual flywheel. The automatic flex plate is F6TZ-6375-AAA.

It is the surface the clutch disc rides, and the ring the starter engages. A glazed face, a warp, or a chipped ring gear is what this replaces. It bolts to the crank in the factory location. The transmission has to come out. The clutch is not included. The ceramic kit is South Bend 1939-CB. The organic dual disc is SFDD3250-6-ORG.

It fits 1999–2003 F-250 and F-350 trucks with a ZF6.

Fitment

• 1999–2003 Ford 7.3L Powerstroke
• ZF6 manual
• Genuine Ford 1C3Z-6375-AA
• Clutch surface and ring gear
• Flywheel only

Torque the crank bolts in a star pattern. A new clutch on a glazed flywheel slips. Replace or resurface the face when the disc is out.