Hello everyone, I have had a Lexus is 250 model for half a year in 2011 with 130,000 km. About a month ago I put my car in for a comprehensive treatment, including chalk oil and chalk oil filter. It should be noted that all parts are original Lexus draft. Quiet and sometimes there are vibrations in the car between gears of the automatic transmission. Test drive he claimed the car's torque converter is starting to get tired, does anyone here have an explanation or maybe read to him something similar? I would be happy to help you before I spend a lot of money thanks in advance