Transmission noise when cold and warm

[Gtdryer]

2003 LT 4x4 5.3

Transmission makes a noise sounding like it’s sucking in air when it’s cold or when it’s warm from driving for 45+ minutes. Seems to only really happen in 1st gear. Still shifts fine, no spinning or unusual lag between gears.

Maybe this is normal?

Thanks

 

[Big Mama]

How’s your fluid level?

 

[Joseph Garcia]

@NickTransmissions

 

[Scottydoggs]

i had the trans pump go bad once, its sounded kind of like a bad power steering pump. but that was a 4l80e not a 60 like the 5.3 engine get loaded up behind em.