Bruski

^^My thoughts exactly^^. I know when and what makes it squeal, so I just don't gas the hell out of my truck and I don't have any issue. Obviously if it does not do it stock then it has to be the tune. If you don't like it, remove the tune.

cscott900

Well you guys are no fun.... OP I have the same noise and also enjoy beating up on my truck a little, I have not found a solution though.

powerranger262

....hmmmmm....you just said that you both like beating on your trucks, which makes them squeal. Seems like you have your answer dudes.

Summers22

iTrader: (2)

Why does my black treky have a white hand shadow????????

scobar

iTrader: (4)

I have a shorter gatorback and it still squeals on shifts. It's amazing, WOT, motor+blower, truck shifts then belt squeal.

Bruski

Who's on first?

DCB

My truck does the same thing. Keep us posted if you find a proper fix for it.

BillyBlurst

Well, I tried a smaller belt. It was a PITA to get on over the alternator, and still has the same squeal.

Of the people on here who report having this issue, how many of us are still on our stock alternator?

Z7What

The issue is that when it shifts at WOT, lets say 5800RPMs the RPMS drop quickly. This sudden change in speed causes the belt to slip. I had this very issue(mine was more of a chirp) on both of my 2003 F-150 after tuning. A Goodyear Gatorback belt fixed the issue on both. One had 3K miles when tuned the other had 22K miles when tuned so still basically new.

Wayne

VTX1800N1

I replaced my stock alternator with a 300 amp when mine died. I also have a gryphon on setting 2. Since installing the new alternator, the belt squeals on full throttle shifts. It never did before. I'm sure the stock 130 A internals were a lot lighter than this 300 A. I do have a gatorback.