Just to clear up a misconception...

The D44 is NOT a stronger axle than the std rear axle on the X.

Its weaker.

It IS stronger than the D44 on the Jeeps, but the changes made hybridized the Nissan D44 so that NO jeep D44 mods work for it now.



The std Nissan rear end is plenty strong, more like a Ford 9" than a D44, including the drop out center, etc.

The odds are Good that Aussie's, etc...may come out with a locker for the Nissan rear...in a few years.

If you want to be sure though, the OR is the only locker option right now other than ARB.

So - If the only issue was axle strength, the above posts have it backwards - the D44 is the weaker axle, but it can come with a locker, saving thousands of dollars in retro-fitting....and, the D44 is still a strong axle, so the loss in strength is not as critical.