Diagnostic Aids

The manual transmission can be noisy for many reasons. It can be noisy in neutral, low, high and reverse gear. Diagnosis the transmission by the level of fluid, and the correct type of fluid in the transmission. If the transmission is in neutral, engaged, makes a whirring kind of a noise, and is heard outside the vehicle, this a normal condition for this type of manual transmission. The transmission could also have internal noise from the gears, synchronizers, and bearings. They should be inspected for worn or damaged parts.