Can one just drive around and get vehicle to temp then jack up the car ? Or it is important to have it at a certain temp?
Also, unless lexus UK service manual suggests changing it, I do not see much reason. If it has gone dirty then I would be very worried.
I have changed transmission oil in cars in past and it never shows any improvement regardless of the high spec oil I have used. It is for the matter for servicing.
Also there is a filter in auto box isn't it? How will one clean that? Drop the whole sump ?
Linas What special too is required ?