We have two 05 T660 turbos that have less than 5000 miles on them and the driveshaft bearing on the spedometer side let go on both. One of them only had 3900 miles and the other 4600 miles. A couple of friends also have T660 turbos and the same happened to one of theirs with also under 5000 miles. To replace these bearings is a very costly venture as it takes 3 1/2 hours to replace. Why is there no grease fitting? Has anyone else had the same problem?