Industrial gearboxes are the backbone of heavy machinery, transmitting power and maintaining operational efficiency across manufacturing, mining, and energy sectors. Despite their durability, gearboxes are subject to wear and tear from heavy use, misalignment, contamination, and overheating. Ignoring early warning signs can result in costly downtime, expensive repairs, and compromised safety. In this post, we cover five critical indicators that your gearbox may be failing, including unusual noises, excessive vibration, rising temperatures, inconsistent performance, and visible wear on gears and bearings. We also discuss why timely inspection and precision repairs can prevent small problems from escalating, extend equipment life, improve energy efficiency, and ensure smooth operations for your facility. Understanding these signs empowers plant managers and maintenance teams to take proactive action, protect their investments, and maintain a safe and productive work environment.