Why does the rpms get high when changing gears?
I have an automatic 2012 with 108,000 miles. On cold start, car sometimes will have a high idle, but not too bad. The main problem is that the rpms get high when I shift gears. I've taken the car to 3 mechanics and they can't find the solution. There's no air leaks. Throttle body, throttle position sensor and mass air flow sensor replaced. I've had mechanic do a tune up, oil change and I got new battery. Transmission place told me the transmission is good, that it shifts hard because of the high rpms. I don't know what else to do. Thanks.
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