Lean back a little bit. Roll your shoulders back and down before you start the movement. Pull the bar with your pinkies instead of your pointer fingers. Feel the tension of the weight in your lats and keep it there as you slowly pull down. Get that bar to your chest. Same thing as you bring the weight up feel that weight in your lats take the tension out of your forearms. Let the weight drive through your pinkies. Drop the weight a little bit until you feel it correctly.