When considering the longevity and efficiency of your vehicle, a pressing inquiry often arises: Should I actually change my transmission fluid after reaching the milestone of 100,000 miles? This question is not merely speculative; it’s pivotal for maintaining optimal performance. As vehicles endure the test of time and mileage, the fluid that lubricates the transmission may degrade, losing its efficacy and potentially leading to dire consequences. Why is this fluid change crucial? Could the decision impact the overall health of the transmission system and, by extension, the vehicle’s performance? Furthermore, one might ponder the ramifications of neglecting this maintenance task beyond 100k miles. Are there specific symptoms or signs that indicate a dire need for this service? Might the age of the vehicle and its service history play a significant role in this decision-making process? In what ways do the manufacturer’s recommendations intersect with personal experiences of vehicle owners in similar situations?