98 Durango, SLT Plus 4X4, 5.9.
Speedometer stopped working and the abs and red brake light is on. All happened at the same time. I replaced the speed sensor in the rear diff and the transmission. No difference, lights are all still on and the Speedo is still at zero.

 

Follow the harness from the rear speed sensor, forward. See if there is a break in the wires, a bad connection, or anything else of that nature.