Rear Diff Leaking

Hey guys,

I noticed my rear axle/differential leaking recently. I’m assuming its a seal. Can I get some assistance with a "how to" to fix this?

Would it be better to tear into the whole thing and replace bearings as well?

How difficult of a task is this and are there any special tools I would need?

It’s a 1989 Fourtrax 300, 2wd

Thanks

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