Just got done swapping my slippin trany for a newer one, well i got it in and put some fluid in, well it leaked but long story short i fix'd the leaking but then when i started it up and tried putting it in gear it doesnt move, in ANY GEAR NEED HELP FAST. also i lifted the car up in the air on my lift, well in a gear they do spin but in reverse it still spins forward, any ideas??