Transmission Stuck In Gear Problems of Toyota Sienna

The van struggles to accelerate. There is no way to turn off eco mode. No button is available. Van struggles to go up hills , excelerate thru intersections and always hunting for gears or stuck in a gear and sounds and acts very heavy on power train end. There is an option to turn off eco light. Turning off eco light does nothing but hide the problem. We need an option to complete disable eco mode with update or with a button.

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I am concerned about the electronic control system in my 2008 Toyota Sienna van. Rather than the acceleration problems associated with the recalls, my van sometimes does not respond appropriately, eg. There is excessive hesitation and lack of acceleration when the gas pedal is depressed. There are other times, esp. Going downhill, when the car seems stuck in an unusually low gear (automatic transmission). When I've reported my concerns to the dealer (each time it's been serviced for 2 years!), the service rep says, "yes, my avalon does the same thing. It's because the gas pedal is no longer mechanically attached; instead it relies on radio waves which can be affected by temperature and humidity. " so, while this does not appear to be as "dangerous" a problem as the unintended accelerations, I can imagine a scenario when I would need to accelerate, the car would not respond, and I could be rear-ended. I felt it was important to "report" this apparent problem, as the testimony I saw from Toyota officials seemed to heavily discount the possibility of there being problems with the electronic control systems. But something isn't right! I previously drove a 2000 Sienna and did not have any of the hesitation I have described above. (unfortunately, that engine "died" at 78k, I believe, due to the "white smoke" problem that had been subject of an earlier recall!) note: stated date is most recent date van hesitated and was "stuck in a low gear. " problem first noted in Nov. 2007 with less than 1000 miles.

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