Is your metering device a fixed orifice or a TXV?

Without actually going through the system myself your description sounds like an overcharged system due to the high subcooling number.

 

Well i looked into the Evap the best I could with a mirror and a flashlight. I see several small copper tubes coming off a header going into their respective circuits. Cannot see much. Outside there is an item that resembles a txv ALCO something or rather, but this thing is from 1986. Alot going on out there. Sorry its a slant coil not in my viewing favor. I will get into the crawl soon and look. Need to check on it since AT&T knocked the main trunk after an install. The seam on the sheetmetal is almost UN-repairable. mastics and other taped solved the problem. Its an H coil so easier to see.

 

It's likely a fixed orificemetering device i.e. capillary tubes.

Assuming your indoor conditions are 75° and 52% RH, your operating parameters are in range.

If it is actually a TXV on your indoor coil, then you're somewhat overcharged and the TXV is somewhat overfeeding. Fixed orifice is more likely though.

My thought is that if the buried lineset was a problem, you'd not have gone 26 years without at least one compressor replacement.

 

True. Most people tell me that you are doing exceptionally well with systems of this age. Not worth trying to convert to NU-22 for the sake of gas prices. But I would like to pump the unit down and weigh in the charge. I could also replace the filter dryer. As far as AUX running constantly in the winter, that may be it showing it's age or a heat strip. Have not pulled those out yet. I have checked pressures, checked amperage's, removed squirrel cages and cleaned, cleaned indoor and outdoor coils, caps you name it. This has just eluded me, but as you said I would probably have had a compressor meltdown by now. My fear was flood back due to no superheat. This is a student and not a tech speaking. I need a job in residential please... LOL

 

While 6 deg super heat is low, you at least still have some, you cannot have flood back if you have superheat! Are you taking your superheat reading at the outdoor unit or at the air handler??

 

At the outdoor unit. Have not bothered with true sub or super.