With front-wheel drive being so common these days, the differential is just taken care of during a transmission service, so most folks don't even have to think about it. And rear-wheel drive differentials don't need to be serviced for years, so it's understandable that it's not something on the top of your mind. So it's not uncommon for people to not know they have a differential let alone know that it needs service. To better understand what a differential does, watch this video. [youtube lp-RNR9Xk48] How often should a differential be serviced? Your D&H Enterprises service advisor can look up the manufacturer's recommended service interval or you can check your owner's manual. Give us a call at (925) 356-0683 for more information about your differential service.