I was lucky that I found the problem in time. Hopefully this will help out someone else.
Vehicle: Daily driver1985 K5 with a 350, 700R4 and 10 bolts on 33X12.50s with factory steel wheels.
Occasionally I would hear what sounded like a loose wheel center cap on the passenger rear wheel. I would check and it was tight. Occasionally I would hear what sounded like the metallic screech of a bolt overtightened (or a hub being pulled apart) from the passenger rear wheel. Wheel was fine and no movement in the axle (darn there goes my excuse for the 14 bolts) Finally there was the sound of a pipe being drug from under the rig. Checked and nothing.
Standing outside the noise really sounded like it was from the passenger rear wheel. The location of the noise is really hard for me to understand, since it was the front U joint on the rear driveshaft disintegrating. Some of the bearings were actually broken.
Vehicle: Daily driver1985 K5 with a 350, 700R4 and 10 bolts on 33X12.50s with factory steel wheels.
Occasionally I would hear what sounded like a loose wheel center cap on the passenger rear wheel. I would check and it was tight. Occasionally I would hear what sounded like the metallic screech of a bolt overtightened (or a hub being pulled apart) from the passenger rear wheel. Wheel was fine and no movement in the axle (darn there goes my excuse for the 14 bolts) Finally there was the sound of a pipe being drug from under the rig. Checked and nothing.

Standing outside the noise really sounded like it was from the passenger rear wheel. The location of the noise is really hard for me to understand, since it was the front U joint on the rear driveshaft disintegrating. Some of the bearings were actually broken.

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