[rheavn]

Only the oil. In 170,000 miles of running coaches with wet bearings I have not had a bearing failure---yet. That is why I stay up on the maintenance and change the oil regularly--for me about every two years. I changed all four bearing oil reservoirs today. Sucked out the old oil with a large syringe. Took less than a quart to do all four bearings. Total time spent was less than an hour. The tag bearing oil was darker than the front bearing oil--a little surprising as the front carries more weight than the tag axle.