Possible, even on a low mileage truck like yours. There is an idler pulley that one can replace for about 20 bucks or refurbish with an new sealed bearing for 5 if you can press a bearing in an out. Entirely possible and highly likely regardless of low mileage is that the spring loaded belt tensioner is weak, a function of time tensioned more than miles, allowing the belt to misalign and squeal. Not a difficult R&R and around 100 bucks in parts.
The belt removal test RT recommended is the logical start, assuming nothing else is in contact with the belt.
Yes could be. We noticed some slight movement of a pulley and tensioner also.
Will study tomorrow.
2002 Ford F350 Super Duty crew cab, long, 4x4, 6 speed manual transmission, manual hubs, double rear wheels, 47000 miles in June 2018 - going back to South America and continuing travelling
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