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New Yaris Problem - A Lemon?

81 messages,  Last post on Sep 08, 2009 at 6:57 AM

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#79 of 81 engine dragging... by dake Sep 08, 2009 (4:59 am)
The automatic has an overdrive (I don't think it's even called that, it's not quite a "5th" gear, but it's there). If you pay close attention while accelerating to highway speeds you'll feel it do a final shift. You can test it by manually up-shifting the gear selector. Go from 2nd to 3rd then over to "D" while you accelerate onto the highway. You'll feel the shift from 3 to "D" and then you'll feel another shift after that initial one. The downside to that is, it's geared in such a way that it falls out of it easily. A slight rise in road grade or the difference in drag between changing lanes from behind another car into open air will cause it to come down to regular D and it will tend to stay there beyond say the crest of a hill before going back to high D.   Its goal is better highway fuel economy, but the problem is it's impractical to drive the vehicle in such a way as to use it - heck the car can't drive itself in such a way. The only way to keep it from falling out of high D is to accept minor decreases in speed. We as humans, and of course the cruise control, will typically adjust to maintain a specific speed therefore forcing the transmission to adjust.   I can't really call it a design "flaw", but it's certainly not the best execution. It can be made to work for you, but you have to be feather-light on the gas pedal and be willing to sacrifice cruise speed to keep it in that high D. Replies to this message: thecatman (Sep 08, 2009 5:18 am)
#80 of 81 Re: engine dragging... [dake] by thecatman Sep 08, 2009 (5:18 am)
Replying to: dake (Sep 08, 2009 4:59 am) Thanks Dake! This makes sense. I'm going to give it a try to see what you mean. I hadn't heard about the higher "D", but it makes sense because on my trip I appeared to be getting real good MPG, mostly just going 60mph for a couple of hours using the cruise. Since this would keep it in the higher gear, it makes sense.
#81 of 81 Re: Yaris Problem - A Lemon? [liam3] _NO_ The Truth! [podred] [liam3] [63pont] by phllbit Sep 08, 2009 (6:57 am)
Replying to: 63pont (Sep 07, 2009 11:33 am) I agree the electronic throttle system is very sensitive and if it is out of adjustment or not working properly then you will get all sorts of problems. Mine is not too bad, it tends to downshift to 1st gear when going slow around a corner which can be disconcerting but I have got used to it and just take it a little easier.   But all the other crap I have been having from this dealer is not going to be accepted. Stay tuned for further developments.

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