Had a similar situation with our '06 Pilot on the transmission and rear diff.
Here's what worked well for me.
1. Go to Harbor Freight and get these.
2. Get a fairly sturdy 9/16" wrench. (or one you don't mind possibly breaking)
3. Get a 2 or 3 lb hammer (brass if you can afford it, will have more controllable impact, and will not damage the wrench) Brass or Standard
4. Put the Odyssey on Jack stands.
5. Put the adaptor in the drain plug and put the 9/16" wrench on it positioning the wrench so it's pointing straight down (if you can).
6. Tap the wrench with the hammer with increasing force until it pops loose.
They're not over tightened. They just get tight because the transmission housing is aluminum and the plug is steel. They expand and contract with heating and cooling at different rates and that makes them tighter over time.
Yes a warm, but not too hot, transmission will help. If it gets too hot, the steel will get as hot as the aluminum and you'll have the same problem.
Also, if you drive it a long distance, and let it sit for a while, the aluminum will cool faster than the steel, and will make it even tighter.
In short, start with a cold engine or drive it for 10 min or so, then do the job, don't try it after an hour drive.
GOOD LUCK!
Here's what worked well for me.
1. Go to Harbor Freight and get these.
2. Get a fairly sturdy 9/16" wrench. (or one you don't mind possibly breaking)
3. Get a 2 or 3 lb hammer (brass if you can afford it, will have more controllable impact, and will not damage the wrench) Brass or Standard
4. Put the Odyssey on Jack stands.
5. Put the adaptor in the drain plug and put the 9/16" wrench on it positioning the wrench so it's pointing straight down (if you can).
6. Tap the wrench with the hammer with increasing force until it pops loose.
They're not over tightened. They just get tight because the transmission housing is aluminum and the plug is steel. They expand and contract with heating and cooling at different rates and that makes them tighter over time.
Yes a warm, but not too hot, transmission will help. If it gets too hot, the steel will get as hot as the aluminum and you'll have the same problem.
Also, if you drive it a long distance, and let it sit for a while, the aluminum will cool faster than the steel, and will make it even tighter.
In short, start with a cold engine or drive it for 10 min or so, then do the job, don't try it after an hour drive.
GOOD LUCK!
