Somtime during a recent three month project in Washington State, My Odometer jumped from about 84,000 mi to 135,000 mi. My tach will not drop below 2k (unless the truck is not running) no matter what the rpm is at the moment. I have to assume these two are related? Imagine my sadness in that I wanted to sell the truck soon. Does anyone have a sugestion or solution?. Is there any way to prove what the real milage of my truck is now? thanks in advance! Dan