Bill, how does it work when you manually shift it?
Both solenoids are on in 1st, one goes off for 2nd, both off for 3rd, and one back on for 4th. So, both solenoids work if you have 1st.

A "speed" shift from 1st to 4th would sound like a speed sensor signal boo-boo, but is there any way to put a scanner on your system? If so, check the "output" speed sensor signal. If there is a reading of more than a couple hundred rpms while just rollin along in neutral,(less than 1-2 mph), then you may have the wrong reluctor gear for the trans/ECM combo. What type of gearset does this unit have? Is it a plastic gear drive w/electric sensor, or does it have a metal reluctor gear on the trans, with a magnetic speed sensor?

Well, took a bit of time for the shop to do anything, but, this is what I found out .

Bill, make sure you let the computer programer know what rear ratio you have(3.08), as well as how many "teeth" are on the reluctor gear. There are a couple of different gears. You may have a gear with way too many teeth, and the 'puter thinks it's moving much faster than it actually is.

Originally , I had only told S&P what gear ratio I had, not anything about the reluctor gear . They needed that and tire roll out to program the computer .

That's a good question!
If the folks at S&P know what car gave it's heart & soul up for transplant into your car, they should be able to determine what reluctor tooth count it had. I don't know that for sure, but I would think they would have that info.
In order to see the reluctor and count the teeth you need to remove the speed sensor from the tailhousing, and look into the hole there. you can see the reluctor from there. Then mark one of the teeth, and turn the driveshaft while counting the teeth. It could be 19, 20, 21, etc. Another thing is getting the correct sensor for the (rear)gear ratio. If your car has a different ratio than the donor, the speed signal will be skewed. I know on the earlier electronic speedos, there were different sensors, and you had to order one that matched the rear-end ratio. Those were gear-driven sensors, tho.
I'll check something at the shop tommorrow, and see if/how many different sensors were used for the '94 cars. May git lucky...may not.
S&P should be able to resolve the issue, tho.

Of all the damn things to hold it back from the road ! Sheesh .

I'm guessing your speedo doesn't work anyway, right? It wouldn't make any difference in the signal to the ECM anyway. The signal to the ECM comes directly from the output speed sensor on the trans. Only if the drivetrain came out of a pick-up would there be a problem. The trucks used a "DRAC"(Digital Ratio) module to convert the AC signal from the sensor to a digital sig. to the ECM.

Not so . My speedo does work. If I remember correctly, there is a converter that S&P sells for electric to manual speedos . I've bought  so many custom parts, I really can't keep track without looking up the invoices !  .

Hmmm...in order for your cable-drive speedo to work, you would have to have a gear driven speedo, with an electronic adaptor for the ECM signal. Entirely possible on the trans, as the hole for the sensor is the same size as for a regular gear-drive set-up.
I must be missing something here, if they told you the trans has a metal reluctor gear on it. Don't suppose you could get a pic of it, eh?