Sounds like I need to blow out the entire system and replace TXV then...
Resolves all ideas in this thread! Since the expansion valve is so cheap, its probably worth it.

History:

I had my dad's friend convert it to r134a back in 2006 (before I realized I should have stuck with R12), and its worked fine since. No sealants, no leaks, its ran super smooth. When I came out here to Arizona though, A/C needs to be top notch, so that is probably why I haven't noticed it because its never been pushed.

Its my 300TE, sorry thought I included that on original post.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k