I nave a navara 4x4 diesel turbo auto . Original g/box died at 309 km. As it was a lot cheaper I got a used replacement g/box.It had a vibration in 1st gear. Replaced under warranty, same vibration, replaced, 3RD g/box had same problem!!!
With the original g/box there was no vibration. Only...
The 2.7 non turbo has a reputation as under powered, and sluggish.
I have a 2.7 turbo ,and it has respectable over taking ability. It has 283k on the clock 160 are mine, and it is still running well.