James 
2013 Nissan Altima Sedan 2.5 4dr Sedan (2.5L 4cyl CVT)
Listen up it's the alternator not trans
 I bought this car a year after it came out luckily I bought through Carmax because once I started having the problem and called Nissan they basically gave me the runaround but Carmax is dealing with the problem superbly now for everyone having the shuttering problem like I am having it seems to be the transmission but the CVT transmissions are very sensitive to  The electrical current that they receive and the alternators on these are faulty Nevada how many transmissions they throw in it if they don't change your alternator you're going to continue having the problem over and over again so anybody researching this get the alternator fixed before it destroys your transmission I had the alternator and belt tensioner replaced and problem was gone the shuttering that everybody has. I just don't get how so many Nissan dealerships would rather keep throwing in transmissions and not realize it's the alternator I'm hoping this review helps at least one person out there because I am almost willing to guarantee that a new alternator will help your problem because remember a lot of these peoples cars are shutting off luckily my never did that but a transm  shouldn't cause your car to shut off so I hope someone out there reads this review and it helps them