727-904 REVERSE SLAMS HARD WHEN SELECTED

Just got out of the car and followed your instructions, it made a BIG difference!! It goes into reverse a lot better, very close to how it goes into drive! Thank you all very much... I have another question how long can the car sit without having to do this, or is this on the first start of the day every day??? Thanks
I don't have knowledge on all the variables related to torque converter draining/fluid leveling. We didn't this problem with our daily drivers back when.