jonquil

I'd try a few spots of the tar-like belt dressing placed a few inches apart around the belt. It cannot hurt anything and is far too sticky to get slung off the belt. I have seen it work wonders on high tension, high hp industrial belts.

Sowellraider

I have an 04 with the 5.4L and a super chips programer and under WOT my belt slips as well. Replaced the tensioner with factory part as well as the belt all rollers and pulleys. Still has a chirp. So I changed the shift firmness from the max setting to 18psi and it still shifts hard just not hard enough to slip the belt.

BillyBlurst

I've replaced my tensioner, idler pulley, tried a Gates belt, now have a Gatorback, Thoroughly cleaned all of my pulleys between belt changes, still squeals when shifting from 1st to 2nd if I'm on a level road. If I'm going uphill, the rear tires chirp instead of the belt - wish it would do that every time.

Oh, and forget belt dressing, man. When that gunk builds-up on your pulleys, it'll just make the matter worse.

Bruski

I would not stress it, my truck does the same thing only at WOT. Still running original belt and have been tuned for 6 years now, and have never had any other issues.

powerranger262

Are you two just copying and pasting this same thing in 3 different threads that are 4 years old?

Summers22

iTrader: (2)

Yes, yes they are.........

Bruski

Yes, yes I did. I thought it was funny that the OP drug up six dfferent postings from 4-6 years ago and posted the same thing.

BillyBlurst

I didn't copy anything. Replied to different unresolved posts. Did it involve the same issue, but with different people involved? Yeah. Hoping that maybe someone had found a solution. A community working together can solve a problem that multiple people are having faster than one person working alone. And I know that I've posted things on message boards, completely forgotten about them after solving the problem involved without posting my findings until I've received an e-mail about someone new coming across an old post and inquiring. That is, if you want the long answer.