Originally Posted by Snakebit12
One item to note...if cruise is on while the speedometer falls back, the engine revs up to make up for the preceived loss in mph.
I could really use some advice.
And based on the fact that the engine tries to make up for a perceived loss of speed you could say it's a VSS problem, becuse the PCM is definitely seeing a VSS signal (though it's the wrong one), but if the sensor has been replaced before, then I would inspect the wiring loom and connectors before replacing anything else. Check for loose connectors, corroded pins or broken wires. I'm pretty sure your problem lies there. cheers