1993 Ford Bronco E4OD 4x4 not shifting

ok I have a 1993 ford bronco 4x4 with E4OD transmission. when put into drive it will not go into lower gears. also the speedometer does not work which I believe must be the same issue.
when I bought the bronco it already had this problem.
Here is what I have done to try and fix this Not in this order
1.Replaced the Speed Sensor 3 times(just to make sure the part was good)
2.Checked continuity through every wire in the transmission harness
3.Replaced Transmission and Torque Converter
4.Transmission oil and Filter
5.Replace the plug on the speed sensor
6.spun the wheels while checking speed sensor with volt meter and checked good
7.Replaced Neutral Safety Switch twice
8.Replaced Throttle position Sensor
9.New Engine wiring harness and fuse box
10.Replaced the Computer or ECU twice
11.New Instrument Cluster
12.Checked the tone Ring in the rear Differential
13.Checked Continuity of speed sensor wires from rear diff to firewall plug
14. replaced all fuses
15.All lights replaced front and back and all work
16 checked and repaired all vacuum hoses
17. taken everything apart checking for pinched wires. none found
it has no power seats or windows except the back window ofcourse which works fine.
it is electronic speedometer no cable
if someone can figure this out you are the man
I have a friend that owns a transmission shop and one that owns a mechanic shop and they both have no answers for me.
Also can someone tell me what wires in the plug going into the instrument cluster work the speedometer so I can check those?
any help would be great

thanks
Brian

What speed sensor did you replace or have? One is located on rear differential, and some broncos depending on year and model have one on the transmission.

The speedometer and the shifting dying together tells you they share a source, and on these trucks they do. The vehicle speed signal starts at the sensor on the rear axle, goes to the programmable speedometer/odometer module (PSOM), and the PSOM passes a speed signal on to the computer, which uses it to decide when to shift. If either the sensor's signal or the PSOM's output is missing, you lose both.

You have already replaced the sensor and checked its wires, so the next things to check are:

1. The PSOM's power. On the 1994 and later Bronco and F-Series fuse chart, fuse 18 (10A) feeds the speedometer, air bag and shift control circuits. Your 1993 has no air bag and may number it differently, so match the legend on your own fuse panel cover.
2. Signal through the chain. You already saw voltage at the sensor when you spun the wheels, so now look for that same AC signal at the PSOM's input pins on the cluster connector, then for a speed signal on the wire from the PSOM to the computer. Wherever the signal stops is where the fault is. The cluster connector pins you asked about are on our 1994 Bronco/F-Series PSOM C252 connector pinout (EVTM page 60-, on the wiring page below.
3. If the signal makes it to the computer and it still will not shift, then the computer side and the transmission range sensor are next.

Our 1992 to 1996 Bronco wiring page has the F-Series and Bronco vehicle speed sensor diagram showing the rear axle sensor, PSOM and computer circuits:
https://www.supermotors.net/reference/ford/bronco/1992-1996/wiring-diagrams

And the fuse 18 entry is on the fuse chart page:
https://www.supermotors.net/reference/ford/bronco/1992-1996/fuse-relay-charts

Dana