Originally Posted By: Huie83
I have a 2006 Sienna with 89K miles on it. We picked it up last year with 83K miles. I did 2 drain/fills with Mobil 3309 right when we got it because the fluid was dark. The level is correct, I checked it hot and running, then measured how much I drained and refilled the exact same amount.
Mine shifts a lot like yours. Lazy up shifts ( takes a measurable amount of time to shift 1-2-3. Doesn't flare, rpm's just hang for a second) and just feels confused most of the time. Mine also downshifts to 1st at slow speeds. When you get back on the throttle to go before coming to a complete stop, it jerks forward as it's in 1st gear and then up-shifts quickly to 2nd. It's been like this the whole time we've owned it.
My neighbor also has a 06 Sienna. His shifts better than mine, but also is a slow shifter and can be jerky at times. He's at 140K and has never changed the fluid.
From what I've read, these transmissions are very reliable, shift quality and programming is just not very good. That is interesting about the octane, i've only ever run mine on 87. Maybe I'll give 93 a shot and see what happens.
I've just adjusted my driving habits a bit and let it go as being normal.
That sounds just like my car except that I have flares. Is yours an awd model? I think inherently, the reliability of these cars is a whole lot better with the fwd models. After replacing struts/shocks/links/control arm bushings, the car still rides rough (and I used oem parts!). I don't get it.
A while back, my car had an exhaust leak. After I changed the gasket, it drove like normal again. It confused the [censored] out of me. The car then returned to normal behaviors so I thought it was a fluke of some kind. But a few weeks ago, I was changing the oil in my car and found the first few sections of the exhaust (from the engine) were very rusted. I'm wondering if that'll affect my shifting. I'm also considering doing my plugs. I'm at 126k now.
