hello here' the low down. I have a 90 4runner v6 4wd. It is intermittently making a loud rubbing noise in the front right of the truck. It starts randomly and sometimes stops on its own or will start when I hit a bump,it will stop when shifted into 4wd, or when I brake or turn hard to the right. but happens only a portion of the time. took it to mech, he removed front drive shaft and said prob went away, it seemed the vacuum pump or the solenoid that activates shifting out of 4wd is defective. so he manually switched off the 4wd replaced the front shaft and voila!but on my way home the noise began again. super frustrated, 3rd mechanic in a week. any suggestions

 

wheel bearing?

 

no not a bearing, a bearing noise would be a hum and get louder with speed. this noise onl occurs at lower speeds. I'm thinking it is something in the wheel assembly but don't know what.,

 

Do a search on spindle bushing. Common noise maker especially in winter.