Welcome to the Nissan Patrol forum. To post a question and to see less adds on the forum then you will have to register
first. We are an easy going friendly forum so join in the conversations and feel free to ask any questions.
Become a forum sponsor for only $20 and see no adds with faster page loading times and many extras benefits.
On the subject of diff gears, I run the original 3.9 in mine and find it good. Some like it to rev harder on the highway but I’m at 1850 rpm @ 100 km/h with TC manually locked. 2000 rpm @ 110.. Less engine noise and pulls easily from there when needed.
That sounds perfect to me. I've got a manual so gear ratios are probably a bit different but I'd love for mine to sit in those rev ranges. I reckon mines about 2300 at 110kms and it just feels higher than it needs to be, especially after the pump upgrades.