They reported that the oil in the gearbox appeared black, signaling a potential mechanical problem, and this absence of warning lights further perplexed them. Initially, they were uncertain about the issue and had to consult Lexus Direct and Toyota for insights. Surprisingly, when I described the symptoms, they seemed skeptical and were unconvinced. Despite the master technician boasting 25 years of experience, I managed to uncover more information through just ten minutes of online research.