I’ve got a mazda 6 v6 3.7 from the year 2010 with approx. 69000 miles on the clock. I noticed when going uphill at low or high speeds that the car seems to feel like it is shifting but it actually isn’t. For example when I drive on the highway about 70 going up a hill it feels like it shifts every few seconds even on manual mode in 6th gear. When I hit the gas it shifts back and I don’t feel it anymore. At lower speeds it feels like it is doing a whole lot of shifting at low/medium acceleration. Again if I hit the gas and accelerate faster the car just goes normally up its gears.
I think this is the torque converter doing this, but I am not sure whether it is normal?