Bad gearing, bad tyre choice, dodgy esc and/or radio settings (brake issue) = fail.
I thought this was RC-Monster, not the traxxas forum
Instant brakes sounds like either the throttle profile wasnt changed from the annoying default setting of 'forwards-brake-reverse' that engages reverse without you even letting off the brakes, or the throttle channel was reversed at some point before/ after programming to make it behave that way. You cant guess at these things, or scratch your head and say ' umm, not sure ' (like on the gearing question for example). If you dont pay attention to what you're doing, you WILL screw up stuff that costs alot of money to replace.
Always set the throttle to the 'forwards-brake-reverse with lockout' option that will engage reverse once you have come to a complete stop, then release the trigger & re-enage it to go backwards.
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