For the past couple of days, Ive noticed this issue and its making me worry. When I leave my place to go to work, after the truck has sat all night...the truck wont shift out of first and the speedo wont move at all. RPMs do climb but the speedo wont until all of a sudden it jumps to 20-30mph. Once the truck is warm, it wont do it. I havent checked fluid levels but it doesnt seem like a low fluid problem, but you never know. No CEL or codes stored, already scanned it. Truck is a 2wd 3.0 with 5spd auto, 29k miles. Anyone ever had this happen?