Vehicle Bad gearbox?

Hello, I have a strange problem, I am using UE4 for vehicles, but the problem is this: as you see in the screenshots the numbers of the “Print string” are from the Gearbox when accelerating the changes are made correctly, but when I brake the changes they are not made, they are made but they have a lot of delay to do it, I would like that when the vehicle slows down the marches as it should be, some solution for this? , Thank you.
i using PhysX