I’ve had universal bad luck with Chinese products. Not just one or 2 things, but everything I’ve ever purchased from China has failed prematurely. I put QC with the manufacturer because I don’t have these problems with stuff from Japan or Taiwan.
I had a bright red 1995 Dodge Neon EX for five years and it was a great, fun little car for four and a half of those years. Just after the warranty expired it blew a gasket. After getting it replaced, another gasket blew on my drive home from my mechanic’s place. After that one was replaced another one blew a couple weeks later. And then the head gasket. Turns out that the gaskets on that motor are a known problem which Chrysler wasn’t telling anyone about, but that they also weren’t fixing, even though they had a fix available. After that, I swore off domestic cars as well. However, the rave reviews that the Mustang has been getting for the last few years (and the complete lack of a comparable Toyota – where are you, Celica?) have brought me back to considering one. If, at the end of the day, I’m not satisfied that Ford is doing what needs to be done to address the problems with the MT82 transmission, I may just continue to stay away from the domestics for a while longer. We should have it figured out in a couple weeks…
It was a Ford Taurus with several automatic transmissions. I was informed by everyone that worked on it that this kind of car was terrible for tranny problems.
800 miles on my 2012 GT and all seems well so far…
200 miles and you are in the danger zone. Good luck.
Update: As of last night, we’re officially 1000 miles from finding out if we’ll have any tranny problems on a 2012 Mustang.
Bet you a Bitcoin you don’t have any problems. 
Congrats. I think you’ll be ok, the aftermarket for Mustangs is huge and this is Ford’s main sports car. They will make it right.
I’d go with the recommended break-in procedure (if any) and then not be worried about burning some rubber just to convince yourself the transmission is solid.
1900 miles and everything’s fine. Shifter action has smoothed out quite a bit.
Just passed the 2000 km (1242 miles) mark yesterday and all is well. Yay! I took it through the recommended break-in period and am now pushing her pretty hard to see where the limits are. It has been a very fun process. 
There’s an article on Jalopnik about this…of note:
I’m a new Ford owner. I bought a 2012 Mustang GT with a 6 speed manual transmission. I purchased the car in August 2011. We noticed transmission vibration and noise and after just 1000 miles the dealership had to replace 2nd and 5th gears. They had the car for 2 ½ weeks. While driving the vehicle on November 8th the transmission locked in second and would not come out of second with 2000 miles. Dealership had the vehicle until 12/23/11. We have drove the car and the transmission still does not feel right. We are very disappointed with Ford and the Mustang. My wife, her family and my family have always been Ford people. This was my first Ford and my last. Our families are as upset as we are and no longer tease me for owning my first Ford. They were taking pictures and teasing me and stating that I was a Ford man now when I purchased the car and how I would be converted. When you buy a $40,000 car there is a natural feeling that the car should be dependable. After 30 years of driving I have never had a vehicle leave me stranded. I have never had a vehicle in repair for more than a couple of days. I came across the thread and decided to post. I have not read the entire thread but I will. We have asked Ford to take the vehicle back and are waiting on their decision. The biggest problem we are having is that the repaired transmission broke again with very few miles- basically ever 1000 miles. How do we have confidence in the vehicle? The first repair included seals, plug, gears, sensor, hub, ring, cone an, shield, fluid. The second repair included bearing, seals, plug, housing, retaine, fluid, nut, gasket
Mustang = power train problems. Yet I have one. It’s a great American car. It has an automatic, though I’d prefer a standard. But there have been problems all along the way with Mustangs.
don’t buy a German car, then.
Update, since the thread is alive again: We’re at around 12,500 km, now (7,700 miles) and there has been no issues whatsoever with the transmission. She is still a little sticky when cold, especially in first and second gear, but once she’s warmed up, she has been running like a charm. The winter tires/traction control combo have meant slippery winter road conditions have not been a problem – I pretty much have to deliberately push the car into a skid to make the back end break loose. We drove her half way across the country and back over the late summer and she chewed up the highway effortlessly, getting mileage that was very much as advertised (in the 30 mpg range).
Aside from a squeak in the trunk, which I now believe to be the spare tire being a little loose, I really have no complaints about my baby. Yay!
Sorry to hear about the troubles you’re having, Blue Stallion2012. Hopefully Ford can resolve it to your satisfaction at some point in the near future.
Ford has a TSB for the transmission fluid (they want to change it to a different type used in their dual clutch boxes) that might help with the stickyness when cold.
Latest update: I took my baby in for its second scheduled maintenance check yesterday and they determined that the back end noise I’ve been getting is being caused by bad sway bars and bushings, so the car needs to go in again next week once the parts arrive for those repairs. A little annoying that an eight-month-old car needs something that significant to be replaced. No other issues to report, though.
Aside from this part issue, I’m still very happy with the car. Its performance under winter driving conditions has been excellent, and that was one of my big concerns. The tranny has also had no real issues, which continues to be a relief.
I’m still wondering how that can even be - am I embarrassingly naive to think that ALL the parts on a brand new car should last longer than eight months (excepting the windshield wipers, of course)?
You sure it’s the swaybar too and not just the bushings? I’d also look at a second opinion on that.
I had a rear end squeak on my 2010 which was ultimately found to be the retaining strap/bracket for the fuel filler neck. To his credit, the tech that fixed it didn’t just start throwing parts at the problem, but fixed it right the first time.
If, in your case, it’s actually the sway bar/bushings, it might only actually be the bushings but the dealer has to order the service part as the bar with the bushings already pressed on.