just wondering what fluid i should use

Atf 3+

Atf+4.

ATF + is the minimum. ATF +2, ATF +3 ATF +4 is good. Not all stores sell ATF 4+.

Yeah, I suppose thats true Crazy. The transfer case definately won't be picky about fluid like the transmission would be.

what should you use in NV3500?

the straps that auto zone sold me dont have a lip to prevent the joint form shifting while in use. the straps that are on the trasfer case side do. is that normal??

If I remember right the U-Joints need to have the inner C-Clips.