I hope you have better luck than I did. I bought mine, tried to do it with Chrysler Financial. Started the process a full 60 days before the lease was due to be up. I did this because I anticipated problems. Well they were a complete waste of time. Use your dealer period. Chrysler Financial never sent the documents I needed for my financing through my credit union, this after repeated calls and after I went through my dealer they lost the dealer's check for the car twice which meant my temp 60 day tag ran out and I had to use a dealer tag for several days....Chrysler Financial are complete idiots! I started the process May 15th and just got my tags last Wednesday.
Pat