I have a 2000 Lexus ES-300 with about 45,000 miles on it. When purchased the local Lexus dealer provided their own recommended Maintenance Schedule for various time and milage periods. At 45,000 miles, this schedule recommends a Automatic Transmission Service. I called the dealer's service department and they said this involved draining the fluid and replacing it with a fresh charge. I called several other transmission specialists and some have special equipment for draining and flushing plus removal of the pan and replacement of the filter. Their prices were about the same as Lexus, although it seems like they would do a lot more.
Then I read the 2000 Lexus Owner's Manual Supplement: Warranty, Maintenance and General Information booklet that came with the car. At 45,000 miles it says only to replace the differential oil (not the automatic transmission fluid) but "only if vehicle is primarily operated while towing a trailer or using a camper or cartop carrier". I don't engage in these special operating conditions so I interpret this to mean no such service is needed or adviseable. The manual continues to the 150,000 mileage level with only one reference to just inspecting the automatic transmission fluid.
I take it from this that nothing needs to be done with regard to the transmission maintenance. Would appreciate your thoughts or experience in this regard. :(
