Hearing a louder and louder growl from the rear, suspect it is the rear wheel bearing. I picked one up, it is one big sealed bearing, what is involved in the install?

Thanks,
John

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1986 190D, 2.5L, 5-speed swap, 180,000 Miles (60K by me).
Jeep CJ-7 with Cummins 4BT/NV4500/AtlastII 4.3.
Grand Wagoneer 4BT project in progress!