Why does my Nissan Navara's transmission keep slipping?

I've only had my Navara for a year and the transmission has been slipping constantly. It's becoming a safety hazard and I don't know what to do. Can anyone offer advice on what might be causing this issue?

I had the same issue with my Nissan Navara and it turned out to be a faulty transmission control module. I suggest taking it to a mechanic for diagnosis and repair before it becomes a bigger problem.