Not Ranked
I haven't driven the car enough since fixing the loose axle nut to see if I still have the sound, but I'm presuming it's unrelated. If it continues, it seems to me there are two classes of possible cause:
1. something rubbing or dragging, i.e. contact with a rotating component where there shouldn't be; and
2. something where rotating contact is intended (i.e. a bearing) that is inadequately lubricated and squeaks when it heats up.
The rear is a brand-new ERA rebuild with 200 miles on it, so I'm ruling out any component wearout until I exhaust all other possibilities.
To pursue (2) further, is there any way short of disassembly to verify adequate lubrication of the wheel bearings? I've read that it's possible to jam grease in through the plugged opening on the hub carrier, but that it's a reach to expect this to reach the bearings in any meaningful way.
Does that hub carrier plug just pop out, or is it destroyed on removal? I'd like at least to take a look. Similarly, I'll be backing out the diff fill plug for a look; it's got fresh Teflon tape but I'd still like to double-check the level.
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