[Bob's944]

Like everyone else said, replace both, the other will be going soon. If you have a/c, the back mounting nut on the master cyl is hard to get at, so have a good socket set with extentions and swivels too. The slave is simple, even with having to remove the starter. Bleeding @#$%^&* sucked manually. Took about a day, many breaks with the pedal up so the fluid could seep, I was about to give up when it finally started pumping. Any kind of system to help has got to be better than going at it with a friend pumping the pedal.