In what scenario would you expect to find a transmission failure?

Using improper lubricant in a manual transmission can lead to significant transmission failure. The lubricant is crucial for ensuring that the moving parts of the transmission operate smoothly and efficiently. It serves multiple functions, including reducing friction between gears, dissipating heat generated during operation, and preventing wear on the internal components. If an unsuitable lubricant is used, it may not provide adequate protection or lubrication, leading to overheating, increased friction, and ultimately, mechanical failure of the transmission. This scenario underlines the importance of selecting the right type of lubricant as specified by the manufacturer to maintain optimal performance and extend the lifespan of the transmission.