Hey guys I took my Duratrash out to the walmart parking lot to run it wide open some, (since i don't have enough yard at home) well anyway it was running great, just when I think I have all the kinks ironed our (lord knows I have been through some with this pile of crap) but anyways like I said it was running great. I notice that its revving extremely high and not switching into second. I stop it and look at it and the dang thing has completely stripped all the teeth off the smaller wheel. what can cause this and is there a aluminum wheel i can get instead......what gives guys!