I am very skeptical of needing a tranny fluid change at 30,000 miles as the honda dealer suggested. We love our Honda Ridgeline, but it was lunging and slipping for a few weeks at 45,000 miles before the (partial) fluid change . I think the solution was a computer reset, not the fluid change. I've never heard of a misbehaving transmission being fixed by changing fluid. In fact I've experienced and heard the opposite: Fluid change resulting is a quick tranny demise. Transmissions, especially Honda transmissions should not be in failure after 45,000 miles of mild driving by my very conservative driving wife. Having owned dozens of cars and working on hundreds more through the years, I smell something fishy.