G'Day 4x4xmore, thought Iwould put my replies in the thread hust in case I accidentally sprout some wisdom
"I am aware that civilian and ex army 110's, 130's have a
Sailsbury rear diff which is virtually unbreakable i have been told

"
Made of steel, made by humans and driven by diggers, everything has a limited life and is only preserved by mechanical sympathy.
Now with the weaker front rover diff, what can you do so it can handle big tyres, lockers, heavy right

foot?
Control of the right foot is the ONLY thing that will make or break a set up, look at the no-expense-spared Dakar Rally-Raid crowd!
You can't put a Sailsbury diff in the front?

Sure can. the ready made ones are rare and expensive, ~$2-2.5 K, and a pain to fit.
As others have said:
Fit lockers and aftermarket axles for traction and peace of mind
Limit tyres to 33" or 35 if you can control the red mist
Most importantly- Don't drive like a dick and then complain when things break!
I drove the Surveillance version for a few years around the Cape and Gulf, mostly cross-country, and never broke a thing.
I HAVE seen a swivel housing and wheel sitting in a ditch due to a too-high entry speed into a washout!
They had a heavier front diff and grippier tyres but that wouldn't have changed a thing.
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