4bt Cummins?

[ShiftingSkys]

Instead of using a 4bt cummin how about the Diesel that comes Stock in the X? Like RoninJiro

[Itsme]

You get way more tourque out of a 4bt and the trans, transfer case and diffs will not hold up to this torque monster. If your going to do this, you really need to change the whole drive line and the sas will be a must, due to the engine hight.
You will most likjely need heavy duty diffs and have them cut down and shorter axles made.
This ain't going to be easy, but you will have one bad ass Xterra when done.
I hope you are up for the task and have the funds to pull it off!

I have a Dodge Dually with a Cummins (6bt 5.9 L), chipped, large exhaust and intake systems, 32 psi turbo, larger injectors and it is making 1000 lbs of torque. The rear diff is a dana 80 and the front a 60 (it is 4X4) I can not imagine the Xterra running gear holding up at all, even to a stock 4bt. You need to think seriously about changing the whole running gear!

Best of luck and keep us posted

[midget28]

I wheel with a guy that daily drives his 4bt powered Yj on 42" tires. His has a d44hd front and 14bolt rear.

The tranny though i really doubt would take it. Alot of swaps ive seen use an np205 tcase and 5speed trans nv4500 i beleive but could be wrong. The 4bt is atleast 12" taller than a v6 engine in the X so youll have to ditch the main crossmember thats why you have to beef the frame. The main rails are box tubing & will take the weight if you build the mounts properly for the engine,trans,tcase.

The Nissans factory rearend will take the torque until maybe a 35" tire and a dana 44 front will also survive will be fine till a 35". If you go larger your playing with fire.