GM 4L80E Filter Replacement - In Middle of Job

[Pinger]

Then why do they make so much racket?

Thirst!
Sounds like they'd drink an ocean given the chance. Think of it as induction noise.

(What would/could be damaging is if they were pulling vacuum with oil present when cavitation could occur. So long as there's air for them to breathe, no danger of that. They are never truly dry internally).

 

[Caman96]

I figure I won’t be doing this again. Dropping pan and infusing new fluid from now on.