Need advice on how to replace the rear outer axle bearing. I have a 85 K5 with a 10 bolt rear end. According to the RPO codes in the glove box the axle code is 1GU4 and it has a 3.08 ratio. A while back I had noticed a slight grinding that was intermittent and would occur between 15 and 35 mph. Then about a month ago when we started getting all this snow I put six 70 pound sand bags in the rear for traction, and to counter the weight of the plow when it is in the raised position. Shortly after adding the weight the grinding/growling became louder but still occurred between 15-35 mph. The grinding stops for a split second then starts, stops, etc. Last night when I was heading home from work the grinding was a little louder, and just before I came to a stop at a stop sign the rear passenger side wheel locked up for a split second. I then continued home without any other problems except the grinding. This morning I jacked the rear up and removed the passenger side rear wheel. There is about 3/16ths play moving the axle up, down, and side to side. This seems like excessive play but I can't believe the seal was not leaking and the rear end is full. Questions: Can a bad bearing make the wheel momentarily freeze up or might I have other problems. 2. Is 3/16ths considered excessive play, and wouldn't that much play cause the seal to leak. 3. How do I check, and replace the bearing if this is the culprit, and what tools woould I need besides ordinary hand tools. 4. If it (God forbid) turns out to be the rear end is shot and needs replacing what are my options as far as getting one from the bone yard, and could I get a 12 or 14 bolt with the same ratio that would bolt right in. Sorry for the long post and thanks for any info.