I was on my way to work at the fire station about 0620 this morning when I suddenly lost speed. It acted as of the trans. popped out of gear, it didn't! Upon closer inspection on the side of the road revealed the driver side rear set of duals was about 18 inches out of the rear end. I got it towed home and pulled the rear end down. the nut has backed off the spindle and allowed the hub/axle to come off. The spindle does not appear to be hurt but the nut is boogered up and I will change the bearings an seals just in case. My question is: Is there a better nut/ locking assembly for my 92 D-350? I didn't even see any evidence of a retainer, just the nut and bearings. Thanks in advance for the help! I don't want to have this happen again.