Problems with my Nissan Frontier

I have a Nissan Frontier Turbo Diesel3.0, D22 of the year 2010 and the problem is that when I change to 4th it does not revolutionize as it should be, no matter how accelerated, I do not fit to say it, this happens to me by wanting to pass to other cars and I delayed a lot and I do not know what the problem would be, will it be the turbo? I don't know ... it's but can help me. I hope sustained there I leave an image paired to my mortor