One problem related to automatic transmission control module has been reported for the 1999 Honda Odyssey. The most recently reported issues are listed below.
With less than 45,000 miles, transmission fails to engage smoothly when pulling away from a stop. Also, does not down-shift smoothly at high rpm. Other symptoms are the tcm light and check engine light come on. Upon diagnosis, the dealer confirmed a transmission problem. American Honda agrees to replace the transmission and will cover the parts, but the dealership wants $700. 00 in labor to complete the repair. A 36,000 mile warranty on a transmission is inadequate - I've driven Hondas and toyotas 150,000 and more in the past and have never had a transmission failure. With the number of transmission problems reported for this vehicle on this web site, Honda should stand behind their reputation and correct this problem long-term. I plan on driving this vehicle to 120,000 miles or more - at this rate, that means 3 transmissions!.