Squeel in between gears when accelerating

[nathan.reimers.33]

Hi all,

Today I was merging onto the highway and floored it. Between shift points it squealed (screeched more or less) and sounded like a tire screech. Any idea if this is normal, or is it a loose belt or something?

[nathan.reimers.33]

Also, this is the crew cab with 3.73 gears.

[newdude]

Either you were on it soo hard you got tire chirp or the flapper valve in the exhaust was doing the chirping...

[nathan.reimers.33]

Well, I know it does it every time it shifts when I'm on it. I don't have any super super upgrades (CAI and flowmasters) so I don't think it's squealing tires going 70

[chuckl1218]

flapper valve squeak

[Silverado-Hareek]

I thought the flapper valve only squeaks when changing from V8 to V4 and vice versa? It's that change that manipulates the valve not gear changes I thought.

[SILVER SLED]

My flapper valve make a tire chirping like noise when shifting gears at wide open throttle.

[nathan.reimers.33]

My flapper valve make a tire chirping like noise when shifting gears at wide open throttle.

That's what I'm talking about. Pedal to the floor open.

[14 Silverado]

Flapper valve mine does it. Need to clamp the thing open one day