Reply to "How do I determine if the slave or master cylinder is bad?"

bosswrenchMember

Probably the most direct way to test is to disconnect the slave and cap the line. Then step on the pedal. If the pedal gradually goes down, the master is either bypassing internally or is leaking down the firewall & under the carpet and you haven't noticed it.
If the capped master can hold firm foot pressure for a few minutes, its a bad slave. I ALWAYS suggest replacing the slave with a long-throw unit in stainless steel, rather than trying to rebuild a unit that was marginal 30 yrs ago. More travel at the throwout= longer life for your ZF synchronisers.

8/13/028:37 PM

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