This is on a 2000 RX300. Just wanted to doublecheck the obvious. Can I disconnect one of the cooler lines going to the radiator and attach a hose going to a bucket then start the engine and let the fluid run out while pouring new fluid in until I have bright red fluid coming out (after I replace/clean the filter and pan)? If so, how many quarts does it take for a complete flush/fill? Also is a replacement filter available for the Lexus or do you have to clean and replace the original? Sorry if this is a repeat. All that I found hinted at cleaning the screen and changing 4 or 5 quarts at a time over 5000 miles to replace the fluid. The method I describe is one I have used with success on a 74 Chevy, 2000 Ford, and 2000 Toyota with success. I didn't know if this transmission design would not allow this to be done or not. I have 110,000 (bought used at 100,000) with no trouble yet and want to keep it that way. Thanks.