i have an 02' f150 supercab 4x4. its got the 5.4L with 72000miles and wen u get on the gas hard as it shifts to second and third it sqweeks. it kind of sounds like a belt sqweeking or something. so if anyone has an answer or knows how to fix it that would be great.

 

It's probably the serpentine belt, not the trans. If it's the original belt, replace it with a Gatorback.

 

Definitely the serpentine belt, not the transmission.

 

Oh really. thats a releif. i was gettin kinda worried, i gotta stop beatin on it. thankx for the reply fellas!