I have a 2011 Chrysler 200 V6 with the 6 speed transmission. After about 110k miles, it's starting to clunk when shifting into drive, and act a little quirky. Instead of buying a new Chrysler 200 6 speed transmission, is there an 8 speed fwd transmission that can be installed? Would that not be possible, or could an ECU tune allow the car to run with an 8 or 9 speed transmission? I know the modern 9 speed Chrysler 200 transmission is problematic, but are there others that aren't?