I have a 2000 2500 ram deisel went out this morning found a nice puddel of fluide right behind my left front tire. So after looking at it for awhile found that it is comming out the weap hole right behind the the brake master where what looks like the PS lines go into. What is it and does this hole block need to be replace or is their a repair kit?

 

That would be the hyrdomax booster for your brakes. I'm not sure if there is a rebuild for them or not.

 

So is that ps or brake fluide. What does that part run?

 

Its most likely powersteering fluid. The hydro booster runs your brakes, uses powersteering flow to boost pressure on the master cylinder. Without it, your trucks is gonna be very hard to stop.