Final answer:
Technician A is correct. Most manual transmissions use 80w-90 gear oil as their recommended lubricant. Technician B is incorrect. While it is true that some older manual transmissions may have used motor oil, the vast majority of modern manual transmissions require gear oil. option a is correct
Step-by-step explanation:
option a is correct Technician A is correct. Most manual transmissions use 80w-90 gear oil as their recommended lubricant. 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.
Technician B is incorrect. While it is true that some older manual transmissions may have used motor oil, the vast majority of modern manual transmissions require gear oil. Motor oil is not designed to handle the extreme conditions found in manual transmissions, and using it as a lubricant can lead to poor performance and damage to the transmission.
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 a specific type of gear oil, such as 80w-90, it is not true that all manual transmissions use this type of oil.
There are indeed manual transmissions that use different types of lubricants, including motor oil, automatic transmission fluid (ATF), and other specialized fluids designed for particular vehicle specifications or operating conditions.