Final update: Changed both the TSS and OSS over the weekend. Found where someone scanned in the directions on how to change the oss from a Ford repair manual, and that made the difference. Was originally only going to change the TSS since that what was throwing the code, but since I had to completely remove the valve body to feed the wire through, I decided I would go ahead and change the OSS as well. $75 for two sensors, $35 for mercon V, and about 4 hours to do the job. The dealer wanted $1000, I think I came out ahead. Fairly simple if you are patient and follow the procedure carefully, lets just hope this takes care of it for good.