Power Booster Hissing

[basement]

After reading a few posts and talking to friends it appears that I may have a blown power brake booster. I am loosing a small amount of fluid every few trips around town, enought that I need to keep checking the fluid level. And when I press down on the brake pedal very sudden I can hear a slight hissing sound from under the dash. Can you guys tell me what my options are as far as rebuilding or replacing the booster?
Thanks

[hemiken]

It sounds like the master has been back bleeding into your bosster diaphram and has caused it to rupture or split.  I would have a look on Rockauto and buy a replacement unit as they are cheap to buy and would be the easiest remedy, in my opinion anywayz.

[ksierens]

   If you are loosing fluid, it is the master cylinder that it bad, though the power booster may be bad now also.

[basement]

Thanks, i just checked out that website. Definitely going to add to my favorites.

[hemiken]

  Glad we could help in any small way possible.

In fact, if you do a search here under rock auto you may find discount codes listed for even better prices when you order

[Bullitt-]

Yep if it's fluid your master cylinder is the problem...... My booster has been hissing for over 30 years, especially noticeable if the engine is off.

[Scatterbrain]

My booster started hissing a few days ago.  No fluid though.  Rockauto has a combo booster/master cylinder for 113 plus shipping.  I checked locally at O'rielly's auto and they had the combo for $109.