2000 Ford Ranger 6 cyl Four Wheel Drive Automatic 149200 miles
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hi, my speedometer is not working. After shifting into 4X4 LOW a couple weeks ago, the speedometer stayed at 50 mph. Before even starting the engine, it reads 25 mph. When started, it jumps to 45 mph. i replaced the speed sensor on the rear differential but the problem still exists. What next?

did you stop, put vehicle in neutral and shift into 4low?

as soon as it wnet into 4 low speedometer jumped to 50?

or when driving it jumped to 50 and stayed?

i dont remember. my dad drove it home and i drove his truck home. we got on the highway and he called me and asked my how fast i was going because my speedometer read 50 mph and has been messed up since.

i really need those details to find out whats wrong. but it could be a possible issue with vehicle speed sensor, i belive you may have one in the transfercase also.

after doing research (and help from local auto parts store) i believe that the problem is the 4WABS brake module. All information from the sensors are sent to the brake module.

good deal, glad you found out what ales the vehicle.

does that sound right?
could it be the 4WABS brake module?

i really wouldnt put that at top of the list for speedometer reading considering the speedometer doesnt read off of the wheel speed sensors.

only the vehicle speed sensor. or cable.

But in '96 or '98, ford stopped producing vehicle speed sensors (VSS). They are now controlled electronically.

sorry im alright
wasnt paying attention to the year.

fords did stop in 97 with their new line of 150's and 250's

the vechicles get their reading from the wheel speed sensors and collects it from the 4wabs module.


if you would like i can explain how to test it.

bit confusing though.

but if you have a code for 4wabs then id fix the module first.