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Discussion Starter #1
As some of you know, I am doing an almost full resto on all moving parts on my 660, and I found this...







Should mud/dirt be able to get in there? It was packed full, but none got in the diff, just around it. I bought a seal kit, thinking that the bearings will be fine, but this has me concerned now.
 

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That is not good. I think your better off rebuilding the diff with new bearings. Rebuild kits are actually not that expensive.
If the splines are rusty, that means more parts inside are rusty as well.
 

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Discussion Starter #3
I'll split the case tomorrow and inspect the damages
 
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