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What is your question?
have 93 dakota 5.2L 4x4 auto. was driving, brake pedal became hard and a hiss can be heard when pressing on pedal like a vacuum tube is loose. rear brakes seem to work as truck front end doesn't go down when braking or maybe power assist is off? any suggestions?

2 Replies
Hello, This sounds exactly like a bad power brake booster. These are not repairable and it will need to be replaced. The part alone will run about $300 - $400.00 and take 1-2 hours to replace.
Sounds like your vacuum booster has went bad. Or the vent on the vacuum buster is pluged