wierd noise?

[GreatWhite]

when my truck gets up to whatever gear its going to change in at the top of the rpm right when it switches it sounds like it is releasing pressure? 2008 2.3L

 

[jax4bangin]

hmm.. idk man. i dont have any experience wit the auto trannys. is it a new noise or it has always done it?

 

[GreatWhite]

its just a noise, maybe nothing serious

it just makes the sound when the rpm's are high enough to shift into a higher gear in between the switching of gears it makes kind of a whistling, pressure releasing noise just wasnt sure if it was just regular engine noise?