Hi everyone. I知 having an issue with my trucks speedometer. Sometimes it reads 0 mph while I知 actually going 20-35 mph. Then it will peg out past 100mph, then go to 80 mph. Eventually after about 20 mins of driving, it will read the correct speed. The transmission shifts fine, cruise will set and hold to correct road speed (using gps for reference) and odometer is working normally. Truck is a 2003 F150 4x4 Supercab Lariat 5.4L with 4R70W automatic. I知 wondering if the cluster is going bad in the speedometer part? This is the cluster with tachometer. Thanks in advance.