I bought my STS in 2005 with 35K miles on it. One of the front hubs went bad at 56K miles, the other side at about 76K. I now have 208K and have replace both front hubs 4 times each. The OEM hubs are $380.60 at the Cadillac dealer. I've been putting after market on after my 100K warranty went out. I'm now using Moog hubs which are a supposedly better part. Does anyone have a idea as to why these hubs keep failing? I have new tires rotated and balanced every 4-6K miles. My mechanic is stumped. No leaks or issues with the axles or CV joints that we can tell. Help Good news is that I have been warranting them out for the last 2 yrs. Only costs me $45 today for the RF hub.