I am recently test driving 03 Sienna (Certified and Non-Certified). The question I have is there are some with tow package. Now I am not sure if the tow package was used and what kind a load it put on this refined Camry engine. Does it really hurt if you buy a minivan with a tow package that could have a transmission issues in the long run due to a tow package. I dropped some 01 and 02 models due to the reviews that 03 is much more refined. Is it really true ?