Nissan Patrol 4x4 (Africa)

Thanks for all the input. Will post a photo of the hub and get working on the other homework.

I bought my patrol 98 4.2D with free wheel hubs (Safari I believe). I am told this is a mod. My problem is when I recently went to Matroosberg, coming down hill, the free wheel hubs skipped a spline every now and then. When I opened them back home I can see some damage on the ends of the splines. It...