Goodluck with it mate.
As mentioned Landrover do monitor AULRO.
I had one fail,but thanks to this site was able to recognise the fault before it did any damage.Was on a camping trip,heard a light chirping sound several times whilst off-roading.When packed up and heading home the chirping got alot louder.I stopped and checked the DC joint once again,it was red hot.I removed the drive shaft locked my CDL(I have a DIY lock mechanism) and drove the 100km into Albany gently.Got greasable unis from a bearing supplier and helped a mechanic fix it.The mechanic did ring the local dealer only to be told it isnt a servicible item,the complete shaft needs replacing.
Mine went @ 220000ks approx.
Goodluck
Andrew

