Technician A says that one reason OEMs have eliminated the initial (break-in) lube drain on a new or rebuilt differential carrier is improved machining precision of current geartrain components. Technician B says that because synthetic gear lubes have superior ability to suspend abrasive contaminants, OEMs no longer require a break-lube change. Who is correct?

A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B


Answer: C

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