My Really Wierd Problem
 

i got some zz gears, put them in the car, and then after 1 minute, the car wont go forward when i press the button.
it only goes backward. all the controllers work except for forward.
when i press each button, the ON AIR button lights up except when i press forward. what wrong?

please someone help!!!
its my second bit, and it doesnt go forward.
the on air doesnt even light up when i press forward, it wus ok just before, whats wrong

Put the old gears back and see if the ZZ's gears are just hanging you up. If that's not the problem, I'm stumped. Doesn't sound like you can have a loose wire or anything. Have you done any soldering to the PCB?

I don't think it has anything to do with the gears, sounds like the "forward" switch on the Tx is shot because the light doesn't come on when you press the button.

If you have a soldering iron, you can remove and replace the switch with one from a junk VCR (they are full of microswitches).
Could also just be a bad solder joint at the switch, or a broken PC board foil from pressing too hard.

i thought that to, but i see that the button is over the little black thing that needs to be pressed.
can i send it to u to fix? i might try to get a new one, but i cant find the receit!

the little black thing is the real button

yes, and its right on top, so it should be working but its not