Hey guys i have a rustler that was running really well using a few nimh batteries until it stopped working and now it just runs at a crawl but any more throttle and it just starts slipping....now i have adjusted the clutch all the way but no use and i have also tried replacing it with a new one as well but no luck. I have stripped down the diff and made sure nothing is wrong but still it slips at more than half throttle.anyone got any ideas please