Broke My Rear Axle

Hey guys. I just wanted to check to see if replacing my rear axle with one from a 94-95 GT would work. They're both 28 spline's, but I remember hearing about the 7.5 or 8.8 differential.

My knowledge sucks when it comes to this part of the car, so I'm just making sure I get an axle that fits! :) Thanks!
 
Well the 8.8 uses 31 spline axles, no? I believe the 7.5 uses 28.

While swaping out the whole rearend would be nice, I only broke one axle, and I"m broke enough to where I can't afford a new whole rear end. ;)

Also, I already had the thing fixed, so it's all working now. Although my car took a beating, it still drives smooth. I got an axle with an ABS ring, and my car doesn't have ABS. Luckily, it worked just fine.

Thanks for the replies guys!