Where is the speed sensor located on a 1995 E 150 5.8 not back of tranny?

On a 1995 Ford E-150 with a 5.8L engine, if the speed sensor isn't on the back of the transmission, the next most likely location is the differential. Many vehicles of that era used a sensor in the differential to read vehicle speed.

To be certain, you'll need to consult a repair manual specific to your 1995 E-150 with the 5.8L engine. These manuals often have diagrams showing the exact location of all sensors. You can find these manuals online (e.g., from Haynes or Chilton) or at auto parts stores.

Without seeing your specific vehicle, it's impossible to definitively say where it is. Looking at the differential housing is your best bet after checking the transmission.