I had a KK after my KJ both diesel, the auto box in the KK is a big improvement over the one in the KJ, engine has the same tune as the last of the KJs.
When I got my limited the sport had 16" wheels which I had mine swapped fore and they can run 245 70 x 16 with no lift. The later sport had 17" wheels so I am not sure if they changed the caliper size on the later ones so 16" may not fit.
Barry