I have a Jag differential that has a bad axle bearing. I can't seem to locate a replacement. To make matters worse. I do not know what year or model it is from. I have put it under a Model A body. I think it is from the year range of 68 to 76 because the O ring that is on the bearing race is in the housing and not on the race itself. The bearing is a double ball bearing, meaning two bearings into one race, and is SKF 414444. Any Ideas as to where I can find a replacement bearing for my diff.