Just took care of my P0449 on my 2010 V6 and happy to say all is well.
I removed the rear tires, removed the exhaust, and dropped only the right side of the sub frame. After 3.0 hrs the bad solenoid was out. I did take pictures and can do a write up if anyone is interested. (removing the exhaust took more time than anything, putting it back on was a trip too)
Even changed the rear diff fluid while I was in there..
