Got a 2017 LX570 with 65K miles and I'm trying to find a shop to perform a transmission fluid flush, but have no luck. Located in Houston, Texas area. Two different advisers at two Lexus dealerships advised me it's "lifetime" fluid and it's a sealed transmission. Through a couple of searches I found Weber State University instructional video of how to perform the service without opening the transmission case (see blow). Interested to know if anyone had their fluid replaced in this manner?