I just got my quad back from the shop...the crank went and they replaced it. but now when im riding the quad it gets locked in gear. it wont shift up or down. so i decided to take off the clutch cover. when i took it off and drained the oil it would work fine...all the way to fifth and then back down the nuetral. i took off all the clutch plates and everything looks fine. im not sur what to do. i dont want to start it up without the clutch cover on cuz theres no oil in the transmission. anyone have ne suggestions what could be causing that.