speedo and odo would work every now and then trans shifted hard replaced vss on rear axle worked fine for 5 days now not working could it be ecu or vss1
It sure could be just about anything. But most likely it is in the wiring harness or connection to and from the VSS you just replaced. As explained in the video below you can see how easy the wiring is to damage. And even more so over time does this occur.