all trac to RWD??

Hey guys,  My previa is an all trac.  beings its on air the axles are holding it up in front.  I know i can notch it no big deal there  but both axles are starting to go.  Was wondering if anyone knew if i can just pull the front shaft out and axles out and just run it RWD.  I know i would need to leave outer axle in so bearings stay in place.    Anyone know if tans will still perform the same?  Still have same pick up (or lack of)  that it has now?   and would i possible get better MPG beings it will be less force on trans?    Thanks for any help!!

I would source a new tranny if you plan on doing so. I'm not that knowledgeable about previas  but do they come with rwd tranny? Would one from another car bolt up? I would just think ahead incase something were to go wrong

Welp  pulled out front shaft and still drove fine  so pulled out the whole front drive assembly and the axles driving great and went 1/4in lower