Use wood door shims (Home Depot, Lowes), two at the top, two at the bottom. Tap them in evenly between the NSS and trans housing, work in a circular motion and tap the output shaft with a urethane hammer after each complete revolution (or with a regular hammer but put a shim over the end of the shaft so you don't mess up the threads)
It's not difficult to crack the NSS housing, especially when prying on it with a screw driver. There are countless obscenity-strewn accounts right here on CF. The shim technique works, just be patient.
EDIT: I just read that BC4x4 write-up and they recommend prying on the nut. I wouldn't do that. The hollow threaded pinch-shaft is made of aluminum and breaks easily. Many people have tried this only to have the nut pop off, taking those soft aluminum threads with it. NSS = Toast.
Last edited by F1Addict; 08-09-2012 at 11:50 PM.