Figured it out. Hub seal(s?). See update down below
Squeal - YouTube
Not sure how to embed or I would...
Definitely seems to be coming from the hub or brake, and I did wheel bearings about 1000 miles ago. Only present at ~5mph or below.
Did I screw up installing one of the seals? Wheel bearing? The wheel and spacer are ambient temp after 20 minutes of driving, so I don’t
think the bearing is bad.
I hosed the brakes out with the hose and then a bunch of brake cleaner, so I don’t think there’s some crap stuck in there, but who knows.
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2001 SR5 - Like OEM, only worse (gears, e-locker, armor)