If your looking for an exercise to help with what you say your problem is… look no further than sled bounding. This was used by Dick Booth at the University of Arkansas program a while back ago. It most definitly will teach you to drive out. The weight you use for sled bounding should be 1/4 of your body weight, for total bounds to be 4 times 40 yards. Boothe also recommends a rubber cord to help absorb shock. This exercise should help you drive out and you will stay on the ground longer because your bounding dragging weight behind you :).