Internally Mounted Slave Cylinder

Remove rubber plug from inspection port in transmission bellhousing. Position Bearing Travel Measurement Tool (D87T-4201A) through opening and against slave cylinder. See Fig 1 .

Fig 1: Measuring Clutch Release Bearing Travel
Courtesy of FORD MOTOR CO.
Using rear edge of Black plastic bearing retainer as an indicator, take a reading with clutch pedal fully up. With clutch pedal fully depressed, take another measurement.
Difference between 2 readings is total bearing travel. If bearing travel is greater than .295" (7.49 mm), replace pressure plate and or clutch disc.
If bearing travel is .295" (7.49 mm) or less, inspect hydraulic system for leaks. Repair leak. If no leak is found, bleed system. See HYDRAULIC SYSTEM BLEEDING under IN-VEHICLE SERVICE. Recheck bearing travel after repairs have been completed.