I know i have a 8.25 rear axle, but im not sure about my front axle. How do you tell what you have? Also is there a way to tell if you have lockers or not?

 

From my research this should be mostly right.....

91 and previous models and a vacuum disconnected high pinion dana 30
92-99 are non-disco high pinion dana 30
00-01 are low pinion dana 30
abs or 95 on up you have 297 axle u-joints. if you dont then you have 260 axle u-joints.

for your rear if you have abs then it is a d35
91 or prior you have a d35, unless it is 87-89 with a tow package and then you possibly have a d44.
91-95 w/out abs it is a 27 spline 8.25
96 w/out was the change over year and you could possibly have a 27 or 29 spline 8.25
97-01 w/out has a 29 spline 8.25