Understanding Manual Transmission Fluids

The Importance of Manual Transmission Fluid

Technician A is correct. Most manual transmissions indeed use 80w-90 gear oil as their recommended lubricant. This type of gear oil is specifically formulated to handle the high pressures and extreme temperatures present in manual transmissions. It provides the necessary protection and viscosity to ensure smooth gear shifting and prevent excessive wear.

Understanding Different Types of Manual Transmission Fluids

Technician B is incorrect. Although some older manual transmissions may have used motor oil as a lubricant, the majority of modern manual transmissions do not. Motor oil is not designed to withstand the extreme conditions found in manual transmissions, which can lead to poor performance and potential damage to the transmission.

Answering the Question

The student asked whether Technician A, who said all manual transmissions use 80w-90 gear oil, or Technician B, who mentioned that some manual transmissions use motor oil, is correct. The answer to this question is B) B only. While many manual transmissions do use specific types of gear oil, such as 80w-90, it is not accurate to say that all manual transmissions use this particular oil. There are variations in the types of lubricants used in manual transmissions, including motor oil, automatic transmission fluid (ATF), and other specialized fluids tailored to specific vehicle requirements or operating conditions.

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