The wheel studs are bigger on the JL/JT, but that should not cause a problem. I know JK wheels work on JL and JT (although the JL backup camera is an issue). Is he using his old lug nuts?I have a friend attempting to put Stock Gladiator wheels(mine), onto his 2013 JK. Apparently there is an issue. What I don’t know. Can anyone steer us in the correct direction? Any help is appreciated.