Last I heard the 4.4 could be back. Since Ford has ended their Powerstroke deal with Navistar they will be building their own line of light duty diesels in Mexico. That includes the 4.4L and 6.7L V8s code named Scorpion. Here is an excerpt from an article on automotiveworld.com:"Following...

I have a 2007 Sport Trac V8 4x4 with the 6R80 transmission and have had the "bumping" issue when coming to or accelerating away from a stop. I know there have been numerous TSBs on this problem but I would like to know what the latest is and if it has actually stopped or at least improved this...

Auto or manual hubs?

OK, now I'm confused. What if you have a pre-2009 with this transmission? Are you saying all 6r80s should use Mercon LV or just the '09s?