How do you pronounce it would, it was, etc ( in American English) ? That is, how do you pronounce the "T" when it precedes a semi-vowel like w? Is it a stop T, or even no T at all when pronounced fast  ? When followed by a vowel, it's a "flap T" ( ex: " it is")  , and when followed by a consonant, it's a full T ( ex: "it looks"), as far as I can see, but this I can't nail down.

How do you pronounce "it would", "it was", etc. in American English? That is, how do you pronounce the T when it precedes a semi-vowel such as "w"? Is there a stop T or not when the words are pronounced fast?

I know, when followed by a vowel, it's a flap T (as in "it is"), and, when followed by a consonant, it's a full T (as in "it looks"). Yet, I can't put my finger on this.