When should I consider changing the rear differential fluid in my vehicle? Is there a specific mileage or time interval I should be mindful of, or does it depend on the driving conditions I frequently encounter? Might there be other signs indicating that the rear differential fluid needs attention, such as unusual noises or a decrease in performance? How can I determine whether the fluid appears discolored or contaminated, suggesting it might be time for a replacement? Are there any manufacturer recommendations or guidelines that I should be aware of that could inform my decision on this maintenance task? What potential consequences could arise from neglecting this fluid change, especially in terms of long-term vehicle performance and reliability? Could ignoring the rear differential fluid maintenance lead to more significant issues, such as gear damage or reduced efficiency? Understanding these aspects seems crucial for proper vehicle upkeep, doesn’t it?