Q&A for How to Change the Transmission Fluid in a Honda Odyssey

There isn't any! These transmissions have no serviceable filter, just a screen to keep larger debris from circulating, and that screen can only be accessed after disassembling the transmission housing, so, just make sure you change your fluid regularly, at least every 40 000 miles/ 60 000 kms, and don't use Dexron.

On the lower right side of the transmission, probably lined up with the driver's side tire.

You won’t be saving much, if any, measurable money; Hondas love their factory fluids. I’d strongly suggest staying with factory spec fluids for transmission and power steering.

Take it out and inspect your air filter periodically. Hold it up to the light. If you can't see some light through it, it should be replaced. I'm guessing it should be replaced every 30,000 miles or so, but it depends on how much dirt is in the air where you live and drive. Your engine needs air, and lots of it.

The transmission housing consists of two halves with a gasket between them. It’s not the kind of thing you have replaced unless it’s leaking a lot. That repair is expensive.

That what I did on my 2010 Honda Odyssey. I got $12 plastic pump from Autozone, which came with two 1/2 x 2ft tubing. I used it to suck oil from dipstick hole (5 mm OD tubing worked) and then filled, using the same pump and 8mm OD tubing. If the oil is very dirty, do 2 partial changes 1 - 2 liters at a time. Only then do a regular change. Extra dirt may stay inside the pan, so you may pick it and bring into the solenoid. I didn't want that chance. So, for a precaution, I let the engine run for a few minutes to let the dirt dissolve before switching a gear.

The picture of the transmission is for a ?-2004 Odyssey (second generation?). The third generation (2005, 2006, possibly all the way to 2010) has the drain plug on the other side of the transmission. Most second generation transmissions had an "oil jet" recall that places a tube down the fill hole to help lubricate gears or clutch plates. For these years, and if this modification has been performed, I would pour the new transmission fluid down the dipstick tube.