Dang plastic housing blew up on the hwy. Close enough to relatives house to limp there. Ordered metal replacement and it arrived yesterday evening. Removed old unit and started to install the new one. That is when I found out I was supposed to use the old o-ring with this new fitting. Only thing is it is on the hwy some place. Apparently it fell to the road when the thing blew out. Now I find the aftermarket kits mostly come without a new o-ring. Called the Ford dealers and the only way they sell the o-ring is with the replacement kit for almost $200. Anybody have any info on this o-ring or a replacement part number. Gonna keep trying in the morning, maybe find a hydraulic shop open with a o-ring that will fit and do the job.