I have had my Ranger in to the Ford dealer service for this grans problem. (All the independent shops here seem to be scheduled far into the future.) I've been a customer at this Ford dealership for 30 years, it's service department has a very good reputation. The news was not good. They say it needs a new transmission, a rebuilt installed would be $5,500. That's about what the truck is worth in good running condition. The computer showed an error code "Line D , PO733" which means internal transmission failure. Also, one of you asked if the OD light was flashing. It wasn't but now it is. If I turn the OD off, the light stops flashing. I hate to give up the truck with only 84K on it. plus it would be hard to find a replacement that has the heavy duty rear end of this one. Another complication it that it has a very expensive engine repair issue; I could be in for more than $10K total, engine and trans. I had the trans flushed hoping this would do it, and my thought now is to drive it until it fails and then sell for salvage. Any thoughts?