I have a 97 Taurus with the ax4n tranny. The cooler return line that goes in the radiator (just above the lower radiator hose) is leaking. I have bought several different disconnect tools, but none of them work. Any idea what size it takes? The tools listed for the aox are too small, also my 8 piece set goes to 3/8 and is still too small. The other problem i am having is finding the right part....Ford said they quit making that hose and none of the local parts stores list it (it runs from the lower radiator passenger side to approx 1/2 way to the drivers side or right to left, it then connects to another hose which enters the top fitting on the tranny) Please help...it may use a stepped tool? not sure... any input is greatly appreciated!