Dirty diff oil 2010 WHGC diesel !
 

Usually change diff oils around every 30000 klms This time left it till 35000 .
Oil was filthy ! The oil had done around 28000 klms towing .Plus about 500 klms
on dusty roads,plus rest 100 kph highway ,lots of wet roads with rain etc.etc.No diff seal or axle seal leaks.Which just goes to show how dirty diff oils can get.,!Got a mate with a 100 series LC used to say T reckoned 100000 ks before a diff oil change,well when I convinced him to change all fluids rear diff oil had gone like very thick porridge and had to be spooned out.!
Use Penrite 80-140 Pro ,synthetic.