Which NP 241 do I have?
 

2001.5 auto. Dunno which rebuild kit to order. any recommended sources would be great too! Thanks!

Crawl under the truck and look, there is a tag thats on the back. Most likely the DLD, but thats not to say it doesn't have the DHD.

Get the assembly # also. It may only say 241d but all auto's should be the ld as Tate said. Here is a good place http://quad4x4.com/.