I've got a 2000 TJ with a dana 44 rear axle with 4.56 gears and a detroit locker. My problem is that there seems to be slack in the rear end. When I get on and off the gas the Jeep slams forward like there is slack in the rear end. I've check the U joints in the rear drive line and they are fine. I'm wondering how to correct this problem. Is it possible that there is too much backlash in the ring and pinion? How do I correct this?