Why cant I drive my pathfinder when I engage the gear in drive D?

I changed my former Nissan pathfinder gearbox that was faulty to a new one barely 4 months ago. The former gear box was not changing. It only moves on 1st gear and that's very slow as it wont continue to change and move faster. I had to change the entire gear.

I then discovered just today that when I try to move on drive D, it won't. But its moves on reverse R and on drive 1, 2., but drive D wont move unless it becomes hot. Why is that and what do I need to do?