kyosho mad crusher
 

I just recently bought a mad crusher by kyosho now I know it does not have reverse but the wheels don't even go backwards if you were to push it backwards is this normal??

it pushes forward correctly? or are you hearing binding or anything? weird clicking maybe? it should roll both ways. this is the nitro version correct?

go forward fine no bindingor clicking nitro version

can you spin the clutchbell on the truck? gear mesh isnt too tight? my MGTs have a OWB in the trans that if pushed forward the spur wont engage, but pushed backwards it spins the spur gear so if the clutchbell is locked up, the spur wont spin not allowing getting pushed in reverse
if your gears spin as they should. it may be taking apart the trans and making sure everything is as it should be.