I just bought a rebuilt world class transmission off of ebay and i put it in today but when i try to put it in gear it just wont go in. I can only put it in 1,2 gear with the engine off but when i start it it wont go in any gears. If i have it in 1st gear with the clutch in when i hit the starter it tries to pull the car forward even with the clutch in. Any body have an idea whats wrong here.