2004 6 speed dmax- master or slave cylinder

[O46 speed]

How can I tell if it’s a master or slave cylinder going bad? Seems like on a hard pull my clutch pedal is real soft and goes to floor easy and hard to change gears. When truck sits to cool I have hard clutch pedal again? Thank you

[Supreme Pizza]

Its difficult to determine which one has the leaking piston seals, but due to the inexpensive cost of each - ya might as well swap both. You can get them very inexpensively on Amazon or eBay. 

 

 

If you post the year / make / model info or the VIN #, I can search for the cheapest possible price and post the links.