Ford F-250 Super Duty Clutch Master and Slave Cylinder CC649021

This is a clutch master cylinder and slave cylinder assembly for Ford F-250, F-350, F-450 and F-550 Super Duty trucks with a manual transmission. Listed fitment is the 1999-2003 trucks with the 7.3L Power Stroke diesel and the 2003-2007 trucks with the 6.0L Power Stroke diesel. It replaces CC649021, 3C3Z-7C522-CA, CB and CC, 2C3Z-7C522-A, F81Z-7A543-FA, F81Z-7A512-AA, F81Z-7A564-AA and PC701051.

Ford used more than one clutch hydraulic setup on these trucks, and some 2006-2007 trucks use the concentric slave assembly CC649071 instead. Look at the part number on your old master cylinder or compare the slave and line routing side by side before you order.

Replace the pair when the pedal goes soft or sinks to the floor, the pedal stays down after you let it up, the truck grinds going into gear because the clutch will not fully release, the reservoir keeps dropping, or you find brake fluid on the firewall, under the dash or on the bellhousing. On a high-mileage Super Duty the master and slave have worn together, so doing both at once saves doing the job twice.

To install it, mount the master cylinder at the pedal and connect the pushrod, route the line along the original path away from the exhaust, and mount the slave on the transmission with the pushrod on the release fork. Fill with fresh DOT 3 brake fluid and bleed the system until the pedal is firm, then confirm the clutch releases fully with the engine running before you drive the truck.