The rear diff gears still turn whether AWD is engaged or not.
This differential is different from the old differentials you are accustomed to. They work like automatic transmissions. Do you know the difference between a four wheel drive and an all wheel drive?Guys, This is my 4th new Honda (one of them I drove 350,000 miles), my 4th AWD/4WD car, I have driven over 1 million miles without hitting anyone else, I have built several homes and did every part of them (I only knew 1 other person who could do that), have overhauled many engines and am known as “the person who can fix just about anything” but have never needed to change differential fluid, and needing to that does not make sense to me. I know very well the difference between a differential and a transmission. One of my best friends is a certified Honda mechanic. And every other brand too (including Porsche, Mercedes and BMW..I have seen his certificates). I wrote to Honda America, and they told me that they don’t answer technical questions and to ask my "idiot" dealer. I am here to learn what Honda may not have told us. This brings up 2 questions….does anyone know if the rear differential is always “active”? Something tells me it is not….When I bought my HR-V,, the dealer only gave me 2 books…a 150 page owners manual and a much smaller customer information book. It sounds like each dealer is different?
I don't think its a free service - unless you bought some sort of maintenance plan from the dealer before hand or something like that. I should not be too expensive as there is very little fluid, only 2 small crush washers to replace, and once up on a lift- its probably under an hour of labor. I hav no idea what " the dealerships' are charging.I have a 2018 HR-V AWD with 22,500 miles. Recently took it to the dealership to have them check the right rear suspension and they mentioned that it needed a differential service at 15K miles which they have no record of doing. Would that service have been billable or would it have been covered at the time? If it is billable, how much does it usually cost?