My 1986 Ford Bronco 2, 5-speed overdrive manual transmission. The clutch is not releasing when I push the pedal in, If I let it set a while with the engines shut off, it will release enough once or twice to shift between gears and then quits. It drives fine when I can get it into gear, no slippage. Could it be just the release bearing (throw-out bearing) that needs replaced? I've never replaced one of these hydraulic clutches, is it hard, special tools required kind of work? <_<