Hey Rusty XJ, I looked up On Line "nss for a 1996 xj jeep" lots of interresting stuff about other
peoples problems and there fixes, and links to sites even one from the guys at JP MAGAZINE.
It's all just information, GOOD OR NOT SO GOOD I don't know, but you may just get a better though on what is going on with your NNS.
And maybe you have already been there, just a though.