Final answer:
Both Technician A and Technician B are correct.
Step-by-step explanation:
Both Technician A and Technician B are correct. Some manual transmissions do use the same type of fluid as that used in engine crankcases, while others use the same type of fluid as that in differentials.
The type of fluid used in a manual transmission depends on the manufacturer's specifications. It is important to consult the vehicle's owner's manual or a reliable source to determine the correct type of fluid to use for the specific transmission.
Example:
For example, some manual transmissions may require Automatic Transmission Fluid (ATF) which is commonly used in engine crankcases, while others may require Gear Oil, which is typically used in differentials.