Clutch will not hold pressure

[Krazy351w]

Ok guys i have a 94 firebird with the 3.4 i had the motor replaced and when i came back to pick it up they said the clutch wouldnt hold pressure so i told them just to put a new slave and master on it which they did and it still will not hold pressure. Im getting pissed because they have since bought and replaced the slave and master 4 times with out telling me but they charge me for the parts. i love this car but i cant afford to keep putting parts on it with out getting it fixed

[blue02Z]

if those parts are all new make sure that your pressure plate is good. you might just need a clutch

[Krazy351w]

wel when the clutch was off it look good and i know itwas good before before i had new engine installed the car and clutch shifted fine.

[Krazy351w]

does it take a special type of fluid?