I had somewhat the same problem before on mine and it was all pretty new stuff and one of the lines started leaking and kept leaking at the gear box even after removing and putting it back on. I finally pulled the line off again and started looking at the inside of the flare and noticed a small hair line crack. Put a new line on and still leaked a little bit, so I cranked on it more nad it stopped leaking. Maybe you should try putting one of those flare nut wrenches on it and crank it down nice and good!