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LT230 centre diff wear / ATB?

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Currently rebuilding my transfer box with 1.2Q gears, sleeved casing etc.

On stripping the centre diff down, the bronze washers for the planetary gears had disintegrated and the gears had worn themselves into the housing. I then stripped two more LT230 centre diff which still had the washers intact however there is slight wear in the housings of both of them still - photos attached below.

How much, if any wear is acceptable? (anyone got a decent housing spare for sale?) or do I just buy an Ashcroft ATB and be done with it?

 

 

98AE4C75-7682-44D1-942D-BCD8416B0A8A.jpeg

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As a plant and agri fitter I can say that the planet and sun gears have a clearance and it is usually way bigger than in a gearbox or on the crown wheel and pinion. I’ve seen a ZF duetze tractor diff where the sun and planet bevel gear teeth were a fine cast finish with no machining. So these aren’t as critical a part as many other gears in a truck/car/tractor. I would reassemble one of the better housings.

What kills them is spinning the front wheels. They don’t turn much against themselves on the road. To blow the thrust washers a driver must have doing tight turns by applying the handbrake? They hate that. 

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Years ago I had contact to Dave from Ashcroft. He told me, that they use cases like that.

I had it for 180.000 km in my LT230. He was right.

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5 hours ago, Team Idris said:

What kills them is spinning the front wheels. They don’t turn much against themselves on the road. To blow the thrust washers a driver must have doing tight turns by applying the handbrake? They hate that. 

Yep, one good way to kill any diff is spinning one end really fast as the planet gears are only there to allow a small difference whilst turning, not cope with huge speeds / loads.

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I read the same,

 about spinning up the diff, possibly on here, and that is something the ATB eliminates.

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Engage the Diff lock, when it is possible and not, when you feel it is necessary. This will save the thrust washers. It is possible, when the surface is slippery and the tires can eliminate differences in revs

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None of the damage is my doing! - These all came out of 300tdi defenders and discos that I have scrapped over the years, no idea of the history of them!

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