Overdrive Solenoid and Torque Converter Clutch failure

So I had a CEL show up the otherday. I didnt really think twice about it because I thought it was from a misfire. I usually get one every now and then when the battery has slowly drained over a few weeks to the point of barely starting the car. It'll chug for a few minutes but once warm it levels out and runs fine. This CEL showed up while I was warming up the car, and charging the main battery with the alternator. I WAS NOT IN MOTION. I WAS PARKED.

Well I drove it to Montrose today, and noticed I didn't have 4th/overdrive, but it also seems to not have 1st as well. There is no pick up and go, just slowly gets up to speed. It drove like it was in a limp mode of some sort. I should also mention that Reverse is just fine as well.

I played around with the O/D button, and trying to coax the trans into shifting down to forth. no luck. Other than a bit higher MPG and higher trans temp, It really wasnt a problem. Once I got to a gas station, I checked the fluid and it did smell burnt, but not like burnt oil. It was more of an electrical/plastic burnt smell.

I stopped at the local Vatozone, and had them look at the check engine light cause: two things came up from the reader:

1.) Torque Converter Clutch malfunction (solenoid maybe? I dont recall exactly which one)
2.) 3-4 Solenoid failure

I have not heard of either of these, and am educating myself via the FSM currently. I thought I would ask y'all for some advice.

What am I looking at with the torque converter. As I said, I have second and third, and it seems to shift between the two just fine. If the converter clutch was bad, wouldn't the car be undriveable at highway speeds?

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Second, is the OD solenoid in the valve body, on the outside of the case, or in the OD unit itself? the FSM is not clear on this

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For now, its not an issue, but in a month I will be hauling some axles about 1400 miles, and although OD is not an issue; I may need 1st going over some passes with the extra weight.

I have a month to fix it, and need to get on this quickly.

ANY HELP IS APPRECIATED!

Below are a few clips from the troubleshooting guide in the FSM: