Those tranny codes have to do with the shift solenoids......obviously something is open in the circuit to them(check the fuse that powers them both?)....with no power they are essentially both off, thus only 3rd gear.......When the PCM commands a solenoid on, it is grounding the circuit to that solenoid.....both solenoids use the same fuse.....if the fuse or circuit is open, then the solenoids are constantly off, resulting in just 3rd gear....

You need a schematic to see if there is power into the solenoids at the harness connector.....also need to read the resistance of each solenoid circuit to see if you have a complete circuit to each solenoid(should be around 20 ohms)....

Ok cool, maybe I can find the schematic on my Alldata.
Will check it this week

Ok- between the other project and silage harvest I have dug around and found wiring diagrams for the tranny. It seems I have 5v at pin A, and nothing at pin E. It looked by the diagrams that pin E is supposed to have 12v.
I have tested all the fuses, I am working on the relays.
Am I correct that pin E should have 12v? Is there a way to jumper 12v to it to see if I get my shift solenoids to work? I am capable of unpinning the wire from the connector so I can't possibly backfeed the PCM.
Thanks

OK- I went ahead and removed the E pin wire from the harness to avoid any chance of backfeeding the PCM or anything. I inserted a 12v wire into E and test drove the car and guess what?! The darn thing shifts. SO what I need is a wiring diagram to see where pin E (a brown wire on my car) gets it'* 12v so I can repair it or permanently provide 12v to it with the key on.
Anyone know where this wire goes? I can'tfind anything on the web.
Thanks

According to the wiring diagram I see, E terminal has a pink wire, it is circuit 241, and it goes to the cooling fan 10A fuse, in the I/P fuse block....the brown wire goes to terminal F, and has 5V(this feeds the temp sensor)

That was what I was seeing on the diagram, too.I figured I had the wrong diagrams. This car has no pink wire- and the 5v is pinA. Pin A is a yellow wire. Very strange. That is where I am lost with the wiring. I compared the colors on this car to the diagram I found and it'* totally different.
When I connected 12v to where the brown wire was, pin E, it went to working, I watched with the scantool and the shifts corresponded with the solenoid changes.

What I see is

A is the control circuit for the A sol(lt green)

B is the control circuit for the B sol(yellow/blk)

C is the control circuit for the PWM(brown)

D is the control circuit for the TCC(tan/blk)

E is 12v power for the tranny sol circuits(pink)

F is 5v power to the temp sensor(yellow)

G is the ground circuit for the temp sensor(blk)....

Have no idea how sending 12 o the F terminal is allowing you to shift....sure you have the correct terminals

You must have a pink wire....that is terminal E...should have 12 volts with key on....that comes from your cooling fan 10A fuse in the I/P....

Do you have 12 volts on any leg in the harness? Also I have seen, wire colors change(fade) over time.....where the wires go into the harness, are the terminals labelled, A to G, on the connector? They should match what I have printed....unless someone screwed with the wiring to the harness, like pulling wires from the connector and putting them back in the wrong position?

No, definately no pink, I pulled it back to the firewall. I didn't put 12v to F I put it to E, which is brown, I even scatched the casing of the wire to double check. I may have A and F turned around, I have diagrams from both car and transmission sides, but the yellow wire has 5v. None of the wires had 12v anywhere.
I don't understand how the PCM is controlling the shift solenoids (providing the grounding to turn them on/off) but not providing the 12v- so the "pink" wire comes directly from the PCM?
Anyhow, it shifts well now and I took it on a 100 mile trip last night to Denver and didn't have a problem, I am really glad the PO didn't totally wear out 3rd gear, they drove it that way for weeks! They thought it was struggling to take off because the supercharger was bad! Didn't even realize it WASN'T SHIFTING!!! People like that are dangerous on the road.
I really appreciate your help here, I think I am trading this trainwreck for a worn out GTA Trans Am.

Terminal "E"(pink wire) gets it'* power from the 10A cooling fan fuse in the I/P fuse block....this one fuse powers all the solenoids in the tranny......The PCM does not send power to the solenoids, it only controls them by grounding them....

That makes sense, the only two codes it has are 1561 and 1562- cooling fans 1 and 2. The problems are related.
As long as it has power to E, it shifts. Good to know I won't b low out the PCM doing that
Thanks again!!