It sucks when they let go. Mine somehow started rubbing on a crossmember and broke the line in two at about 75mph on the highway, spiking the RPMS.Blew fluid all over the truck and trailerand made on hell of a mess. Needless to say the tranny was completely wrecked and got rebuilt and there's now a small foamblock under the line to keep it from rubbing if it happens again.