Hey, I have a 2006 Ranger XL 4.0. It’s a manual and it’s been squeaking upon acceleration. I replaced the idler pulley and the tensioner pulley. I believe it’s now the harmonic balancer. Can someone help me out? Is this a somewhat easy fix? Or is it even the harmonic balancer? I put a video of what it’s doing. Thanks!

 

Does the sounds' pitch change with rpms?
Have you try to run the cold engine while the belt was off?

 

I’m when I did the tensioner and the idler pulley I did. And no squeak. Then with the new belt it worked for a week then it looks like the harmonic balancer separated and the belt is sitting right next to the balancer.
rpms it actually goes away the more rpm’s