Fair enough. Here is the meat of the article:

Ford Ranger Speedometer Quit Working

Q. I own a 1999 Ford Ranger XLT regular cab with a 4 cylinder engine
and a manual transmission. I am currently having a problem with my
speedometer and odometer. My speedometer has been lagging for at least
six months. It was not working until I hit about 30 mph. Two days ago
it stopped working all together along with my odometer.
My Check Engine Light (MIL) and ABS light have been on for about the
same amount of time. What do you think is wrong with the truck?

A. Beginning in 1998, the Vehicle Speed Sensor (VSS) has been deleted
from Ford truck models. On vehicles equipped with 4-Wheel Anti-Lock
Brake Systems (4WABS) , the vehicle speed signal is generated by the
rear anti-lock brake sensor and sent to the 4WABS module. The 4WABS
module sends the vehicle speed signal to all systems which require a
vehicle speed signal input.
Ford Ranger Speedometer Quit Working
Vehicle Speed Sensor (VSS) is located on the rear differential.

Vehicles equipped with Rear Anti-lock Brakes (RABS) generate a vehicle
speed signal from the rear axle speed sensor. The Generic Electronic
Module (GEM) receives this signal (VSS_GEM) for internal use and then
distributes it to the appropriate other users, i.e., the PCM, speed
control module, and speedometer.
If you just had different tires installed, the new tire information
needs to be input to the GEM to turn off the MIL and ABS lights.

He's (at least more or less) on the level - Looks to be a Q&A type
operation, and the site discusses a speedo problem.

(Don't blame ya for being suspicious... I was too, but my curiousity got
the best of me in the end :) )