Ok guys I just bought my LS and replaced the motor and in doing so lost some trans fluid while pulling converter. I have the factory DVD for this and it states a whole 20 step procedure and needing special fill tool and vacuum tool. None of this is needed at all. Drive car get trans up to operating temp. I put mine on my lift so car is level and can get to everything. You will have to figure out to do the same. Make the car LEVEL. To check fluid level just unscrew the small center plug inside the larger drain nut with the car idling in park. If some trans fluid leaks out its full. If none dribbles out, put little plug back in bottom of pan. Unscrew the welch plug in rear of trans like right above the trans crossmember. This plug is facing the rear of car and is marked on the trans from ford. You need a way to pump 1 or 2 qrts of trans fluid in that hole. Start car and remove lower little plug untill fluid stops dripping out of the pan. When it stops drooling its full. Put all plugs back in and your DONE. Way to simple.