OTC Tools OTC 7646A Ford Clutch Coupling Tool. The essential tool for reaching and disconnecting the hard-to-access hydraulic clutch line from the clutch slave cylinder. It releases the fingers that hold the clutch line without damage to the clutch line or coupling. It works on 1988-current Ford vehicles having a hydraulic clutch, including light-duty trucks, Bronco II, Ranger, and Explorer. Also works on 1989-current Ford Thunderbird and Mercury Cougar with manual transmission and hydraulic clutch.