It's BS. Click and Clack summed up this well one day. You only hear about the one guy that changed his fluid and the trans went south. You never hear about the other 100,000 people that changed there's with no change or positive benefits. We like to remember the bad stuff. If the trans failed it was already on it's way out.

Changing the fluid is never a bad idea. The old fluid is full of metal bits that abrade everything and wear it all out. It's always good to get that fluid out and putting fresh in as well as a filter. I second the Trans-X. I've seen good results putting it in my 82 wagons trans. Put a bottle in before you refill the system. Then fill the rest with ATF.

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