[joeydurango]

Originally Posted by raggedjim

I'm sure you probably checked for this but is there any chance the outer lip of the backing plate is rubbing on the drum? I had one that was bent at the edge and it made a high pitched squealing noise.

Good luck, Rg

Yep, I checked that - but thanks for the idea anyway. Haven't had a chance to even look at the truck this week. Going to check the wheel bearings more closely as soon as I have a few minutes. That's currently my leading hypothesis. As much as I don't want to swap 'em (or learn the condition of the axle shafts ), at least it would be something identifiable and reparable and I could be done with this!