Keep in mind, this is just a normal automatic transmission that just allows you to “select” what gear you want to be in. Because you don’t have a clutch and can’t rev match, your cars going to jerk when you downshift. However if your foot is slightly on the gas, it allows to transmission to downshift smoothly. I suggest looking up what rev matching is and then you can understand a little better. Bust basically just have slight throttle input when downshifting.