Those complete assemblies cost more than the older pressed-in bearings but are much easier to replace. GM has always used the bolt-on assemblies. Chrysler started on a few models in '87; now they all use that style. Ford took a long time to totally switch over but I think that's all they use now.
On most of these with the bolt-on style, you absolutely can not tell which bearing is noisy even when it sounds like it is coming from a certain corner. You have to jack it up and run it in gear, then listen next to each one with a stethoscope.
Tuesday, March 8th, 2011 AT 3:12 AM