Tahnks Guys, The idoler pulleys feel fine and the tensioner moved freely. I even put a little WD-40 in it to lube it up. I just can't figure out why in only does it in gear?

1966 Coronet 440 conv. original Mauve metallic, with white top and interior. 1971 360, J heads, 625 AFB, 340 cam, intake, and manifolds. With 3.23 SureGrip.

1969 Dart GT: B5 Blue, White top, 318, With A/C