Speedometer is based on the tone rings on the abs system on the WJs.
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It's either the speed sensor that is on the transmission, which is about 17 bucks. Or it's one of the ABS sensors on one of the wheels. Do you have a speedometer still?
There is no speed sensor on the transmission. The speed is gathered from information from each abs sensor (one at each wheel) If one fails, it will trip both the abs and brake lights, but the speedo will still work based on info from the other three sensors.
Dirty, if your transmission does have a speed sensor on it, refer to my comments in your other thread regarding your steering setup.
2002 Overland - 4.7 HO, "Select-Drive", 4" RC long arms, TAG front winch bumper, 32" BFG KM's, 3" exhaust, Magnaflow hi-flow cat, Flowmaster 50 series
My WJ's ABS light came on 2 1/2 years ago (1 month before inspection was due). Of course you can't read ABS codes with an OBDII reader so I went to the stealership & paid 45 bucks to read them. It came up that 2 wheel sensors codes & a code for the pump controller (or just pump, I don't remember exactly now). So I tried to check them with an ohmmeter but found you can't check these that way. Well I checked the sensors to verify no busted wires. I seated the big wire harness connector on the pump controller. The light went out and didn't come on again until last week. The antilock brakes worked fine for the whole time, especially during our snowy winter. When the light came on last week on my way to work, I went into work and when I drove home that night it had gone out. well the next day it came on again. When I left work that night (thursday) I pushed on the connector to seat it. The light hasn't come on since. I'm wondering if it's not bad solder joints on the controller board where the mating connector solders to it. I may see if I can get to it without compltely removing it from the Jeep.