Izusu Bighorn 1990 Diff?

[Alexrobin]

Izusu Bighorn 1990 Diff is making small clunking noise when turning at low speed - just started doing it - on the minor side of a clunking in the rear diff - what is the torque speciforcations for the dif plugs/can't find info/have no manual - whats a good fluid for a diff in these vehicles? and what is probly the problem like i state only started doing it? only thing may have caused it - i drove up over a curb at low speed but that shouldn't have done it... bought itnot long ago - any help appreciated Thanks

[geeves]

Check your u joints first Any play and they need replacing.
Is it open or lsd? A check is lift one wheel and turn it. If its hard its probably lsd
An lsd with the wrong or old oil can clunk and clatter