I believe the original torque setting was 120Nm, but that was thought to have been giving undue axial load to the rear hub & carrier bearings, therefore a figure of 90 - 100Nm was revised. Can anyone confirm the above?
I have always set mine @ 95Nm with no ill effect.
My Haynes manual (printed in 2005 for the 98' to 03' models) also states a torque setting of 90 - 100Nm for rear spindle nut.