That's interesting. Last week I took my 2002 Lexus to a Texaco Oil Change shop for an oil change. They wanted to change the transmission fluid, talked to me about it, then refused to do it because I could not provide evidence that it had been changed 40K miles ago. They said they had had problems after changing the fluid in trannies that had not been changed per manufacturer recommendations. Said sometimes the tranny refused to shift properly with the new fluid.

So I am wondering - urban myth or not?