Help please. The car is a 2010 Corolla S with about 85K miles, I bought used in Jan 2015. This problem mostly happens when I am using the cruise control. I will be going up a hill at about 65 and regularly but not always the trany will downshift with a very hard “bang” like running over a pipe. It will make the shifts in a normal smooth manner at other times going up hills in cruise control. This hard shift is very abrupt and startling if not ready for it. In can do this when not in cruise control if at highway speed in accelerate to pass but not as consistent. It has not done it at in town driving.
I took it to the dealer, as I had a warranty, and took the tech for a ride so he could feel it. I was told the next day the warranty company says this is “normal” behavior.
I do not believe this to be normal. Any ideas to help me when I get back to the dealer?