I have a 2000 xterra and production was 12/99 on the door, what spline count is my rear axle. Can not remember if it is 31 or 33. I have been looking all over the place and can't find anything other than bits and pieces of years and spline counts. Thanks

I would venture to say, 33 spline

I would say the same but I need to for sure. Thanks one vote for 33.

I'm pretty sure the only 31 spline axle offered in the X was the c200... I think all post 1999 or 2000 h233b's were 33 spline... I'm sure someone will chime in to support or correct me...

It should be a 33 spline.
They have been NO documented Xterras with the 31 spline axles in a H233B.

Pikachu has one of the first X's produced and has 33 spline axles.

The 31 spline H233B's only came in old frontiers. 1999/2000 with the 4.363 gear ratio,
mostly king cabs and standard cab 4x4's with little options.

Yup, 33-spline for sure.