I swapped my Tactic 2.4 ghz receiver with the Traxxas receiver that comes with the 2.4ghz link radio. For some reason it appears that the speed on the truck has decreased. I know I am not running in training mode and have also recalibrated the esc several times. I have also restored the radio to factory settings following the instructions provided in the manual. Yet there's no improvement. The other odd thing is that when I restore the TX to factory defaults, the throttle is reversed. I have to actually follow the programming link to restore the throttle to the normal behavior. Anybody out there who can help figure out what's wrong?