2005 ford f150 transmission over heating. Just replaced the transmission an put new coolers on. (Bypassed the old ones) but its over heating now. Today when it got hot I pulled a line off the cooler and the oil was cold. Could it be the thermal bypass? There is oil in the coolers so it did work for a short period of time? Could I have screwed the by pass when I blew out the lines and flushed them?