Auto trans has a hard shift from 1st to 2nd and or 2nd to 3rd. This occurs most of the time. I expected the shift to be smooth all the time, especially in a vehicle the cost of an Enclave. This problem is anoying to me. Otherwise I like the car. Dealer CSR said its nornal for that vehicle. I thought the shifting would improve over time with more milage,but its still the same. After 70 years plus of making auto trans you would think GM could get it right. Would not buy another Enclave due to this problem.