could it be the converter?
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1997 Chevrolet Venture Question: no brakes at all. pedal hit the floor. I don't see any fluid anywhere. master?
Answer #1cardocIII from Gillespie's Auto Service, February 24, 2014, 02:31Master
It's not the convertor. Does the master cylinder have brake fluid in it? Sometimes a brake line fails and it sprays the fluid and doesn't show much of a wet area. If the fluid level is low, add some and have an assistant pump the pedal while you watch underneath. You'll probably find a leak. There is always a chance the master cylinder itself has failed, but they usually cause the pedal to drift down (fade) at stops before it just quits working.
Answer #2Greg's Orange Auto (13041 Answers) , Orange, CA - (714) 361-9386globalhelper February 24, 2014, 06:26Master
insp all wheels for fluid leaks and master cyl. remove master cyl and ck the rear seal for fluid
Answer #3csubak30 February 24, 2014, 13:48Master
Betting on the master cylinder has failed. Check to see if the rear seal is leaking.