just did a el conversion in my ea centre point so its got el enging and trans...but as i drive along and i like hit a big bump its like the trans is slipping and its quite violent...revs surge up then snap back very quickly and u can feel it in the rear wheels....also sometimes does it wen i give it a fair amount of throttle...also i dnt kno if the power button is working....transmission seems full last two time i opened it oil leaked out? please help.. need to get it roadworthyed