New to the site . I hope I can help as much as I know you will help me.

Have a axle seal leak so I pulled the axle and I notice that there is excess thrust on the axle , so pull the other side axle and look at the center section and I see that both pins are completely gone (741) case, so I am thinking that is why i have so much thrust on my axles , is this correct? So I have a 489 case that I can slip right in, Now on the 489 case it's a close end where the axles slip in no pins with that said how does the thrust nut adjust the thrust on both axles? THANKS