The frequency of the squeak seems to correlate with the speed of the vehicle. Your mention of backing plates could be a good clue. I just got done replacing oversized front brake drums with new 11 inch drums. There are relatively unworn brake shoes that rub slightly on the new drums even with the adjusters cranked all the way down to their shortest setting. The curvature of the shoes most likely doesn't match the curvature of the brand new drums. Also I installed brand new roller bearings for the front spindles. I lubed as many zerk fittings on the suspension as I could. About half of them wouldn't accept any grease. This truck probably hasn't been lubed in decades either and suspension squeaks are certainly likely. These squeaks occur the same whether I'm on smooth pavement or a bouncy dirt road. I'll drive it some more and look for some changes that might occur when braking. Front brake shoes that haven't yet worn to conform to new drums could be a possible culprit. I haven't ruled out u-joints either. Thank you hcb3200.
1946 Chevy pickup, 1948 Chevy suburban, 1950 Chevy pickup, 1952 GMC pickup, 1957 Chevy pickup, 1939 Chevy pickup
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