How often should I change my differential fluid to ensure optimal performance of my vehicle? It seems like a straightforward inquiry, but it raises numerous considerations. Should the frequency of changing differential fluid be determined solely by the manufacturer’s recommendations, or are there other factors at play? What about driving conditions? For instance, does frequent off-roading or hauling heavy loads necessitate more regular fluid changes? Furthermore, how does the type of differential fluid itself impact the longevity and efficiency of the system? Are synthetic fluids truly superior to conventional ones in this regard? Additionally, could neglecting this maintenance task lead to more severe mechanical failures down the line? To what extent does the climate you drive in—extreme temperatures or varying terrains—affect the intervals at which one should replace this critical fluid? What signs should I look for that indicate it’s time to perform this essential maintenance task?