Hi guys, well did a search on this problem with no luck! Last week the speedometer started to flutter, and then the truck started to surge on the highway,I checked the ignition and everything checked ok,truck runs and idles ok,so 3 days later the speedo stops working all together and the surging on the highway stops,now it wont shift into overdrive on the highway,so I went through the checks on the truck manual the only thing i couldn't check was the voltage at the d.r.a.c module, with the truck raised of the ground running and in drive, so i replace the vss for grins. I do have 13v at the d.r.a.c. on the light blue and black wire,same as battery. I do have extra grounds installed from block to chassis, any ideas.
Thanks in advance.
Thanks in advance.
