I had an '09 GT that was a wonderful car, but it started giving me problems, so I began thinking about a new car. Couldn't afford a new GT, so test drove a '16 V-6, but dealership couldn't find a manual transmission. Automatic car seemed nice. I really wanted to wait until 2018 to save more for a down payment, but then Ford pulled the rug from under me and announced the discontinuation of the V-6. The hunt was on for a '17 V-6 six speed manual, found one 150 miles away, local dealership wouldn't deal, so drove there to make the swap. Big mistake, didn't test drive the car first. Drive by wire system is agonizing, I was squawking the tires in second and third gears, throttle closes so slowly. If you drive the car like granny, and keep the revs around 2,000rpm, it's not a problem, but who buys a Mustang that doesn't want to rev it? I called the Ford Performance Hot Line, guy pretty much laughed at me when I mentioned V-6, couldn't help with a recommendation for a tuner to eliminate the throttle lag (hung revs?). Said Roush might help, e-mailed them last week, still no answer. It's impossible to drive this car smoothly, even on the Interstates with the cruise control engaged, you can feel the throttle opening and jerkily closing. Any tuners out there that won't void my warranty?