Hello! I have a 1997 Rav4 2wd and I need to repalce the rear wheel bearings. I have not been able to get a straight answer from anyone about this, so I hope someone can help. Can I replace just the bearing, or do I have to replace the entire hub assembly? If it is just the bearing, do I need to have a machine shop press the new ones in? I know that the 2wd is different from the 4wd. Thanks so much for any and all help!