Had Lexus dealer do the drain and fill in the past, when I had Slee do my lift and sliders I also had him do plug's fluids, wheel bearings and a complete fluid exchange on the transmission. I trust a LC expert like Slee knows how to do the exchange the "right" way. That exchange was at 120k miles, now at 140k miles I am good for many more years. Give me time to find someone close to Austin I would trust to do a complete fluid exchange.