I'm trying to take off my front drive shaft to check a noise, Idk if it's just rust or I'm missing something but the rear end of it won't come off.. I took off the 4 bolts and nuts from the front end, the back of it I took the nuts off but can't get the bolts out (not enough room) am I missing something?

 

Bolts are captive and do not come out unless you remove the flange.

 

You don't need to take the bolts all the way out. The driveshaft should pull off of them. Perhaps knock it with a wooden or rubber hammer (being careful not to be under it when you do so).

 

Been trying for hours to get it off, don't know what to do now. I sprayed penetrating oil around it so hopefully that frees it

 

You need to strike it with a mallet. It will come off. there's nothing else holding it on other than corrosion. As mollusc points out, once free gravity may bring it crashing down more quickly than you're prepared for so be mindful of that. Ideally put a block of wood against the first yoke and strike the wood with a mallet.

 

Put 1 or 2 nuts just barely threaded back on, then wack it with a mallet. That way it will break free and not come crashing down

 

Hahaha. Duh...