Hello. I have a 2016 spark, automatic. 84k miles. When I am driving on the highway around 70mph the gears will keep jumping. The RPMs will jump to 4 or 5 and then back down to 2. It will keep repeating this. I can push down the gas to make it shift and it will stop but once I'm coasting again the RPMs will start jumping. You can feel the jerk each time. You can also hear the transmission revving. It will also do this on side roads but not as often. Is this normal?