I have a 2014 Chevy Spark with 46XXX miles. Just recently, I believed that the transmission was beginning to misbehave. In 2016, I had it back to the dealer for the
reprogram of the transmission computer, to correct low speed downshifting, slow acceleration, etc. The car began to perform better than it ever had. Last month, had it
back to the dealer again for intermittent "jerking" and occasional "whining" noise at highway speeds. The Tech road tested the car, and agreed that there was the occasional "jerking" but felt it was not the transmission. The service advisor told me th