I'm still not following you on which band you think is potentially bad Dan. There are three bands in the transmission. Their labels are foward band (which leaves you with no forward movement in D or 3). The manual 2-1 band (which only engages when you select 2 or 1) and th reverse band that is engaged only when R is selected.
Ack, I need to look at the rest of that chart. Forget the input band. It'* the input clutches. If you have no reverse and 1st, then it'* the input clutches. However, looking a bit closer, the input sprag is also held on both reverse and 1st.
I'm almost thinking about the sprag. I know the third gear sprag when it goes you lose third only. I'm kinda thinking that'* potentially the same issue here. With all the other things good, a bad sprag would keep 1st from being used.
Changing the solenoid. Totally easy, takes about 30 seconds to do. however, getting to that solenoid, not so easy. Figure a good 6 hours. They are inside the transmission side pan. I don't believe it is the solenoid unless you also have no 4th gear.
Hmmm, here'* a thought. I wonder if you perhaps have a blown fuse. Not sure what it is labeled as on your car, but it might be misc eng/OBD2 Do you have cruise control? You can also test for voltage on pin E on the transmission plug.