I have a 2001 ranger 4x4 with the 3.0 (not the flex) 5 speed manual and ive replaced the speed sensor in the transmission and the abs sensor in the rear differential and i have speed reading up to my obd2 and ive replaced the dash but still have no reading on eathier speedometer or odomoter.

can anyone help?

 

Welcome to the forum

In 2001 the speed signal comes from the engine computer(PCM), its in the engine bay, upper firewall has the BIG 104 wire connector
PCM gets a signal from the OSS(output shift speed) sensor on the transmission, should be drivers side rear, 2 wire, is that the one you changed?
OSS is about 32,000ppm(pulses per mile)
PCM converts that to 8,000ppm which has been the Ford standard ppm since the late 1980's
PCM then sends that speed signal out to the cluster and cruise(if so equipped)

If you have speed signal in the PCM, i.e. OBD2 shows it
Then PCM is working

Pin 68 on the PCM is a grey/black wire, it has the speed signal OUT on it
I would pull the 104-wire connector off just to have a look for any corrosion, you can also test pin 68 for 0 ohms(continuity) to cruise module or Cluster

It runs to a splice behind the radio(maybe) where it splits and runs to the cluster, 4x4CM(kick panel), GEM(behind radio) and cruise
All these wires are grey/black
It's pin 1 on the instrument cluster's center connector
Pin 3 on the cruise module
Pin 14 on the GEM
Pin 12 on the 4x4CM
All grey/black wires so easy to ID

You could OHM clusters wire to GEM wire, or to 4x4CM wire to make sure they are connected, if on then run a new wire from either of those
If they are 0 ohms then speed signal is not making it into the cab, so none of them have the speed signal
May need to run a new wire in spliced to pin 68 grey/black wire


Rear axle ABS sensor was used for the speed signal only in 1998 to 2000 Rangers, just FYI
1997 and earlier used VSS on speedometer cable gear drive of transmission or transfer case

Speed signal in all years is AC volts, 0.5vAC to 8vAC, and is only present when shafts are spinning, in this case the output shaft of transmission, so hard to test for signal on the wire
You can jack up rear wheels but be safe
But I don't think you need to do this because you already know you have a good speed signal in the PCM(OBD2 reader)