Also to add with FSR, Your R&P is slightly different and the carrier itself has some minor differences not only to accept the 33 splines but the different style of R&P.

All those lockers listed on the Calmini site are definatley for the old HB/Pathy's.

Also to reply to Calmini. The last year in the US that used the 31 spline H233b axle was in the 97 Hardbody. There is no current Nissan model that uses the 31 spline count axle that you listed "86.5-02", in other words there isn't an 02 here in the US that uses the 31 spline.

The 33 spline started in 96 with the unibody Pathy and was introduced in the Frontier and Xterra. The only exception is that with the 98 Frontier there was no V6 and Nissan used the C200 axle. Even though the 96-97 Hardbodies were only available with the 4 banger they (4x4) still used the h233b 31 spline.