>1999 Sentra SE SR20 has Viscous i do beleive that 98 200sx SE-rs and 98-99 SE's have open differentials.. heres where i looked at least.. http://www.se-r.net/about/sentra_se/98_sentra_se_stats.html and http://www.se-r.net/about/200sx/98_200sx_stats.html of course correctme if im wrong..