NObody's stuck if they assert their rights .
Lemon Laws are different in every state, but for the most part, if you take the car in for service- get your problem documented on a service order! Two of three times with the same ( serious) issue and I think you've got a case.
Don't accept the grinding and jerking as "normal", "it won't cause a problem"," it's just the way it is, don't worry..."( or whatever excuse they happen to throw your way).
Fight them and get another car!