clutch loses pressure

[4speedburb]

my clutch loses pressure after driving down the highway, and when i don't touch the clutch for a while, but i ca n drive in the city all day long. has brand new slave cylinder, and brand new master, not to mad about it, just an inconvenience

 

[bucket]

Did you have the problem before the new master and slave? Sounds like one of them is bad to me.

 

[4speedburb]

the master was on its way out, barely built pressure, and the slave is brand new right when i put the master in