To all my mechanics, I just happened to notice because I bumped it with my leg but I have a 2000 Pete 379. If I’m sitting still with the truck idling and i flip the shifter into high range then move the spitter from direct to overdrive it will make the speedometer go from 0 to 85 and back to 0. Same when you move it back from overdrive to direct. It will also throw my ELOG into driving. Can some explain the relationship between this and what maybe can causing this.