if you've ever found yourself trying to "control" the weight and "squeeze" at the top of your rows, that's your problem. use some body english, get heavy weights moving. you can worry about "thinking the muscle" into the weight when you do your vertical pulling, when you're pulling horizontally, ESPECIALLY with a barbell, your goal should be to get that bar from below your knees to your stomach somewhere between the navel and the sternum.
and don't worry about "removing the arms", either. the more muscles you have firing, the more focus you're putting on moving the weight. so what if your biceps are involved? it just means that instead of using 245 you'll use 275, your back is still working at maximum capacity.