Wear particles in rear diff oil

Submitted: Thursday, Mar 02, 2017 at 17:48
ThreadID: 134401 Views:4447 Replies:12 FollowUps:3
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I have posted this on LCOOL so I apologise if your read it before. But this forum seems to have all the wise old heads and I do value the advice.

I put my 2008 200 series in today with my regular mechanic for a 190,00km service and asked him to change the brake fluid plus diff and transfer case oils. I bought it second hand at 136,00 km and wasn't sure if this work had ever been done. ARB air lockers are fitted front and rear.

Anyhow when I picked it up he pointed out some wear particles that came from the rear diff oil. Most were very small. But there was one about 10mm long x 3mm x 1mm. Neither of us had any idea whether it had come from a gear tooth or a bearing cage or somewhere else. The diff has no noise coming out of it nor any excessive backlash.

Maybe the wear stuff came from a previous owner (the army) misusing the diff lock? I am looking at two options:
1. Get ARB to tear it down, inspect and repair and live with the bill.
2. Run for 20,000 km then have the oil tested for wear metals.

If the diff is trouble free for the next 20,000 kim Option Two will have been a good idea. If it destroys itself, it won't have been a good idea at all.

So I'd appreciate any advice.

Keith
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