Will a Rheem TXV and coil work on a Trane condenser unit? And how are the TXV's set up, meaning are they installed by the tempature rating , valve size, brand.. If so are they all will different brands work with diff equipment if the setup is the same?

I know this sounds odd, but I'm trying to wrap my head around the operation of a TXV.

There is way more info about txv's than one could ever put here for you to be able to grasp how one works.

They are rated for sizing and for type of refridgerant ( r22 or 410a)as well as the indoor coil. You can mix a trane with a rheem coil. Not recommended because they are engineered differantly but it can be done.

How old is this rheem unit and what seer is it? And what seer is this trane unit? Mismatching seer ratings and coils can make the unit not work to its highest potential as well.

TXV's are designed for specific refrigerant use (in your case R-22 or R410A),size tonage/BTU capacity, bleed or non bleed style,etc. Many people consider a TXV a mystery because they have never taken a class or studied its application capability.

Below is a short list of publications for your consumption. Happy reading

http://www.parker.com/portal/site/PARKER/menuitem.734d2913eb3c11da13576f849420d1ca/?vgnextoid=d195f87357e28110VgnVCM10000048021dacRCR D&vgnextfmt=default&division=528d84aa40701110VgnVC M10000048021dacRCRD&literaturetype=Technical%20/%20Service&searchAttr=searchResult&languages=EN&pa rentCh=Division#results

Coil is 3 years old and the condensing unit is 8, but 18 seer. I don't remember the seer on the coil. This is a r22 setup and I think the TXV is holding back freon to chill the house, the house humidity readings at the t-stat are up and down 43%-58% and can really dial it in . The charge was set by a licenced tech and I haven't called on him again until I know more on TXV's so I don't sound like one of those customers that get in the ______ all the time.
I've read Wiki and been looking for more.

Thanks for the links above, I'll check it out.

You unit will never run above an 10 or 12 seer than until you replace the airhandler and coil. That kind of humidity is normal on a summer day depending where you live. I live in eatern Pennsylvania and my house runs about that on a normal summer day over 90 degrees outside.
To find out if the txv is acting up you will need a tech to diagnos. You will need special tools and knowledge of how one works and be able to check r22 temps/ pressures and several other things.
I would try to save yourself the hassle and just have someone look at it. Maybe a different tech or company and let them go over whole system and advise you from there.

Coils do not have a SEER rate listed on the coil itself. Coils are listed to be used with outside units and the SEER rate is based on the outside unit and the coil combined. I can use any coil on any outside unit BUT the outside units SEER rate will be affected and usually for the worst. It is always best to use matched components since then you know the alleged SEER of the entire system. You will need the assistance of a knowledgeable HVAC service tech to clear up your present situation and good luck finding one since they are scarce as hen’s teeth. Most service techs belong to the slap and clobber society where as they know just enough to get by. While this is a sad statement it is true as proven by national statistics. Many folks do not know that a one ounce under or over charge can cost one SEER point loss on a cap tube/piston metered system. A TXV system is not affected quite that bad but it still makes a difference.

A bit of reading material for you.

This is the coil I have.
Rheem Criterion unit
Coil- RCHA-36A2GG17XI
Made-2/04

Wow! Thanks for your input it'll help out a bit, by the way I'm in Austin Tx. It's been oldly hotter this summer than any we can remember for some bit. I spoke with the neighbor which has his own ac company and capasitors are blowing up right and left keeping him in the money every day.

Thanks again and if I get it going soon I'll post.