i have found the sticky that states my axle size and gears but not the axle spline, i believe its 28 but not sure. my axle code is 87. which is 7.5 rear end with a 4.10 gears. just want to make sure before i buy the wrong things, thanks.

 

im almost positive its 28 spline, the fx4 lvl IIs have the 31 spine

 

the 7.5 only has 28-spline shafts.There are no other options for them.

 

what dose the 8.8 have?

 

28-spline and 31-spline. In Rangers the 31-spline was only in the FX4 Level IIs.

 

^^^ So... in a 02 XLT with an 8.8, I would have a 28 slpine?

 

Yep.