On intermittent noises one cannot ignore the rear outer cv joints. Many may not have seen a relube since they were new.

I almost see adding a couple of ounces of heavy oil as a maintainace item. Typically when they are getting somewhat dry they produce noises of an intermittent nature. Keep driving on them and the noise can become constant. At that stage the axle will probably need replacement. As a general rule as long as any noise from them is intermittent they will respond well to a relube.

Every time we purchase one of these cars it is my belief they should be done. It costs little and is very easy to do. Incidentally heavy oil was in them from the factory and it is superior to grease. The failure of many cv joints in other bransds I have changed over the years was a failure of the grease basically. There was hard stiff grease left in them but none was reaching the working components of the cv joints. I often wondered why other manufactures did not switch over to heavy oil as the joint lubricant. To a simple guy like me it just makes more sense.