Dana 35 or Dana 44
I believe that is the Dana 35
Yes it will same models and everything.
80w90
I'd look at the pinion bearing first. It's near the end of the rear end.
80w90, if posi it requires friction additive.
Generally it is the Dana 35, and 44 models
You can go with 87 thru 1995 for a direct fit.
Yes, the 35 is the standard rear end, 30 up front.
The 35 is standard, but the 44 is an option in that year and is found on the Sahara.
Not exactly, yj's were a spring under desiegn while the xj's were spring over. Width wise, the xj rear will work, but you'll either have change the spring perches on the axle, or change your center pin in your springs.
what front and rear end are in a 2001 wrangler sport 4.0
If it has the same gearing yes, but I believe all Wranglers (excluding Rubicons) have a rear Dana 35 which is not a desirable axle. I would suggest a '97-'01 Chrysler 8.25 29 spline from a Cherokee. Or if you can find one, they also came with Dana 44's in '87-'88.