How to use the same SLUG name for multiple categories?

I’m having a problem with using the same slug name under different parent categories. If I create a new category and give it a slug already in use, then it takes the slug and appends the parent category to it. For example if I wanted my site structure to look like this:

domain.com/cars/ford/
domain.com/trucks/ford/
domain.com/suvs/ford/

WordPress changes it to look like this:

domain.com/cars/ford/
domain.com/trucks/ford-trucks/
domain.com/suvs/ford-suvs/

You’ll notice the first use of the slug (in this instance ‘ford’) is untouched, but subsequent uses get changed and even if I go back and edit them, wordpress changes them back.