The South Bend 1939DF is a ceramic and Kevlar clutch kit for a 1999–2003 7.3 with a ZF6. It is rated to about 400 hp and 800 lb-ft. The flywheel is not in the box. It uses a solid flywheel. The kit that includes one is 1944-6OK.

The disc is a 4-paddle, 13-inch, 10-spline. Kevlar faces the pressure plate for a cleaner takeoff. Ceramic buttons face the flywheel for the hold and the heat. The pressure plate, the throwout, a roller pilot, and an alignment tool are included. The factory flywheel is 1C3Z-6375-AA if the face is glazed. The hydraulics are HYDX-F67.3.

It fits 1999–2003 F-250 through F-550 trucks with a ZF6.

Fitment

• 1999–2003 Ford 7.3L Powerstroke
• ZF6
• Ceramic and Kevlar, 4-paddle
• About 400 hp and 800 lb-ft
• Throwout and pilot included
• Solid flywheel required
• Hydraulics not included

A dual-mass flywheel does not take this disc. The organic kit with a solid flywheel is 1944-6OK. Torque the pressure plate in a cross pattern.