Get me a vin# not saying your wrong by anymeans but according to CAT (central atlantic toyota) and home of Toyota University where the east coast techs take there certs it's the so called rule of thumb. That's what I was told while attending one of the classes I have to take to keep my certification.
I have 2 friends with the auto and 2.4 one is a 98 and the other is a 99 and can't look up the correct parts without their vin#