Medium and Heavy Trucks
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The code 128 is engine, code 140 is instrument cluster, code 144 is vecu. They all have a PID code for vss-vehical speed sensor, FMI 9 & 5 is voltage problem. With all that said I would look for any damaged wire harness for the vss. If the harness is ok I would change the vss located on the rear of the transmission, it has 2 wires coming out of it and held in place by one small bolt. Its kind of tough to get it out but not impossible. Clear the codes when done.
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Thank you, Doug