Well, put the OEM Motorcraft belt on yesterday when DHL came and its as happy as can be. So if it starts squeaking after 100 miles again then I know its the tensioner, although that thing is pretty darn tight!!! I had trouble moving it with the 8in handle 3/8 rachet I used and the old belt never made a sound, except occasionally when it was raining, and when I put the new one it was screaching after 50-100 miles so taht brings me to this conclustion: Duralast parts are not good. But if the new one starts again then I will go with the tensioner being bad. Oh yea, another reason I think the tensioner is good: the belt would squeal LESS when I turned the A/C on.
