When accelerating the vehicle sputters and catches. this is extremely dangerous if trying to accelerate on a highway or should you need to accelerate to avoid a collision. my vehicle was bought brand new and currently only has 23,600 miles on it. this should not happen to a car with very low mileage. this issue happens while turning, while on the highway, while in reverse, and while on a city street. i took the car to porsche and they identified that the car needs a new transfer case. this is unacceptable as this is extremely dangerous. this issue seems to have happened on 100s of porsches.