Originally Posted by frydryce
the line inside is teflon, however I do not believe there is an outside coating on top of the stainless steel shell
So the goodridge lines are an utter fail. I'm not sure if Jeep changed the specifications of the length of the head on the hardline side to a different spec. Basically the female side of the goodridge line is too deep and the hardline male part doesn't bottom out and seal. I thought I broke the flange at first, but I put on the stock line and everything is fine.
Not wanting to make a broad statement for all years, but the goodridge lines are no good for the 2014 Grand Cherokee. if you have a grinder or a lathe you can trim down the female side of the connection so the hardline side can bottom out, but it's a risk I didn't want to take with my lines and kept it as stock.