I'll get the codes. They are supposed to look at it for free next week. Makes me wonder if I should even take the chance. U bet I will trying to fix it before though. Yesterday I disconnected the battery for a bit. When I installed the new tccm I only pulled the fuse. See if I get the service 4wd message comes back. Tach still jumping. Supposedly the dealership had to call tech support about my truck while they had it.