The No-Slip locker did make the occasional clunking and banging as the locker un-locked and locked. They do that. The added traction is well worth dealing with the noise and shimmy that come from the locker. We also noticed off-road that the locked rearend was pushing straight despite how we tried to steer the Jeep. This effect is worsened when the Jeep has most of its weight on the rear axle like during climbs or on high-traction surfaces. Also, stress on the rear axle is pretty high as you are driving the Jeep on the road, as both rear tires are gonna want to turn at the same speed.