dorth they are not but if you have anything to say and dont want others to know you can send an email to the administrators they will definitely get back to you
the major part of the weight is on the bearings which is on the suspensions so with time they tend to wear off and need to be changed or else it may cause more damage to the suspensions.
Lifetime means life of a car or lifetime of engine.....lol.
May car company these days says gear oil is for lifetime, that actually means lifetime of gearbox and this around 100k km.
BTW timing chain has a lifetime too, it should be changed around 150k km. Check the manual, its there.
It was completely optional to have diff lock or not in 2000 Patrol GU models. So all GU model having mix cases.
LSD rear wheels rotate in opp direction if set free on scissor lift, if you wondering how to find out if its LSD or not?
2000 GU had Open diff in front (Open diff at the front means it's a standard differential like a road car). The rear lsd works well though and will tend to keep both wheels moving when traction is low. Center diff can always be locked in a 4wd.
Standard is open front and rear lsd setup.
I really reckon you can repair this, and even if you get it done then get the axel alignment to make sure its cured properly.
Its not an easy job, and need hell load of precise calculations.