Transmission Service

I've heard two schools of thought on the issue of servicing transmissions on high mileage vehicles fropm expert rebuilders. One thought is that once the seals have hardened from age and there's some debris and muck in the works it you may disturb things when you add the new ATF with new additives, some of which soften the rubber seals and some of which have detergent properties which would stir up the gunk. The other opinion is that "of course you need to sservice the trans and soon!" Myself,I agree with the latter, especially since you've serviced it once and therefore the original break-in debris is gone. If I owned this vehicle, UNLESS the trans is showing signs of failure, I'd service it. I think the "don't touch it" idea is kinda old fashioned. I've always serviced my automatics faithfully since I think they last longer if you do.