This won't give you much insight into the particulars of the process but just to give you an idea of the potential to transfer, one of my good friends transferred from Rutgers to UT and another from William and Mary to UVa, both residents of those respective states I believe. Oh, and a third from Pitt to American (a pretty big jump though neither are T14 schools). These just happened to be the first three people I know personally who have transferred and done so successfully.
I would imagine there would be a lot of weight on your LS GPA, and perhaps consideration of LSAT score but not nearly as much as those applying for their first year of LS. I'd think the idea is if you do exceptionally well your first year, you can put the LSAT and other factors behind you.