best belt for 4.0L SOHC

[dashhho]

My belt squeal has always kind of been there but very quiet. But now its so loud I need to do something. I have checked all the pulleys and they seem ok. I even replaced the idler just cause. When I hit the belt with some water the sound goes away.

There doesnt seem to be any misalignment of the pulleys. So I slapped on a new belt, and well, the squeal went away mostly at idle. But now when I accelerate it squeals.

Trucks got 290k kms on the engine. I remember ppl saying the gatorback belt works well on these trucks. But I cant find it? Is it gone?

 

[SenorNoob]

Apparently the gatorback hasn't been produced since 2019.

https://bobistheoilguy.com/forums/threads/what-happened-to-goodyear-gatorback-belts.361570/

No idea what else to recommend. Maybe check for length of the new belt and get one 1/2" shorter? I had to do that when I changed my alternator and had a 3mm smaller pulley.

 

[black_demon69]

try a gates belt

 

[JJMaine]

There has to be something causing the squeal other than belt or we'd all have it no?

 

[black_demon69]

belt could be streched or glazed maybe bad tensioner?