Get yourself a can of foamy engine de-greaser / cleaner (personally I think O'reilly's store brand works the best). Clean up the front under carriage really well. Then after your next drive it'll be easier to find out where exactly the leak is coming from.

 

once again thanx, resevoirs aren't really low,, will have to clean it up on the undercarriage an go from there..

 

My Mega cab has a steering box. I'm pretty sure they all do, it's built on the 2500 chassis.
Sounds to me like your axle seal is leaking.