It does this at highway speeds
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2002 Honda Odyssey Question: Why is transmission oil blowing out the transmission breather hose at hwy speeds
Answer #1Avery Automotive from Avery Automotive Repair and Towing, August 02, 2013, 11:37Technician
might be too full. Look at owners manual for checking fluid. Think checking with van off
Answer #2ziptie12 August 02, 2013, 19:51Master
Fuid level is checked with engine 'off' on Hondas'
Answer #3lazyzman August 25, 2013, 19:31Rookie
The 2001 & 2002 Odyssey transmissions are poorly designed and overheat, causing the fluid to boil out. Honda had a recall on the 2001, but have covered up the 2002 problem. I solved my problem by getting a rebuilt from a 3rd party where they improved on the Honda design and added an external oil cooler. Don't replace it with OEM, as it is defective engineering.