99 dakota 2wd hub bearings making noise slow speed have replaced new dealer part

It could be many things, unfortunately and without hearing the noise first hand or being able to do some basic diagnostic tests or be able to drive the car, its hard to say what the source of the noise may be. Anything that makes a noise usually leaves a mark or you see metal filings or a "witness mark" some where. Are the brake pad shims and hardware installed correctly? Is the brake backing dust shield OK? There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online I don't know if their information would throw light on things.