When do you use the different gears in a 1995 Honda Odyssey?
you can use the lower gears when you go uphills or downhills with hills of more than 10% grade
The factory recommended mileage/time interval for replacing the timing belts on the Honda Odyssey is 10 years or 105,000-miles, whichever comes first. That being said the type of driving, environment, how often the engine was run, and so on can create conditions where a much earlier interval is advisable. The price of preemptive replacement outweighs the potential risks from belt failure and tension degradation in this application.