I have a tick like a loose rocker and it seems to be herd the best at between1400 and 2000 rpms! Does anyone else have this problem!! The truck is running fine and has no miss or power lost when its running!! The truck just turned 28,850 miles. Does anyone have this noise like me please let me no!!!! THANKS BEN... . 6. 7, 6 speed auto,silver megacab dually!!! AFE MEGACANNON, MP-8, & ISSPRO GAUGES...