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"The other major drive train development is the continuously-variable automatic transmission (CVT), which is becoming rather common, as manufacturers chase higher fuel mileage and lower emissions.
This unit, supplied by XXXX, is similar in concept and design to competitive units. Most CVTs depend on the engine quickly getting to its most efficient operating rpm and then varying the transmission ratio as required for acceleration and cruising.
We’re still not enamoured of this transmission design but that is likely due to an aggressive driving style. If you are more sedate at the wheel and rarely use full throttle, you might not even become aware that the transmission is different."
Note, I avoided mentioning the manufacturer in this review, but it isn't Toyota. The review itself is from MSN.
One of the '07 6-speed Camry's I test-drove in September did exactly that. My Camry's 'new-old' 6 speed tranny did that often and I told my dealer about it, and the newly replaced transmission does that about half the time (not always), but I have not noticed the accompanying "jerks you into the next gear" you reference.
Like you, I don't care at all for the engine braking when I have taken the foot off the gas pedal.
However, for the moment, I'm assuming this as an intentional, programmed, behavior, and so I am starting to resign myself to live with it - at least until the very moment they release a new 6-speed TSB/program to address this unusual engine braking.
my 5spd and 4sp AT (Hondas) will downshift. they also have grade logic for holding the vehicle in lower gears to assist in going up and down steep grades. it all seems pretty natural for me, comming from a history of driving exclusively vehicles with manual transmissions - although sometimes the upshifts and downshifts don't happen exactly as i would have executed them in a manual...
the issue may be the gearing of the transmission, torque convertor capability, engine power and the programming of the ECU/TCM to achieve the highest fuel efficiency possible.
i suppose that if the vehicle is shifting up rather quickly into higher gears to get the best FE, as they say, what goes up, must come down (eventually anyway). more gears, more shifting.
the number of gears in the transmission, the gearing ratios, torque convertor and engine capabilities, and the programming is going to dictate when shifting will have to occur so that it's a smooth experience (just as it would be in a manual).
i'd be surprised if the vehicle shifted immediately upon releasing the gas in any speed. one would think there's some hysteresis or rpm/speed band where the vehicle shifts into then back out of a particular gear, or exercises a feature of the torque convertor (lockup/unlock).
it's possible as you say, they are still optimizing that programming to match the transmission, engine power, FE, and drivability requirements, but it's possible some aspect of your transmission / torque convertor isn't working properly.
R
I just got my car back from the dealer yesterday following another drop my car off episode in hopes to remedy the "RPM FLARE" I've been experiencing for months. I initially brought my car in several times for that issue but everytime I would bring it in I would get the "If we can not duplicate/replicate the problem you are experiencing, we can not fix it". After numerous trips to the dealer, I finally printed up a lot of posts from this forum with similar problems and got the car doing it on video. I kept saying, am I the only one who is experiencing this in this area because this is not an isolated incident showing the service advisor all the information I had with me and kept re-iterating that I have it on video. She did not care to read the info nor would the video tell them anything. I finally got to talk with a a Lead Tech and I think the Shop Foreman. I told them I kept experiencing the flare when they finally came out and said "Oh, there is a TSB out that describes your exact problem." It was like pulling teeth to get that out. I mean in a nut shell, it was like they knew that there was a TSB for that issue but until they could duplicate the problem during a test drive, they could/would not do anything.
They ordered the parts (new valve body, gaskets and some other parts) and have already performed the TSB. They told me problem is fixed, I returned with problem not resolved and scheduled another visit. Since then I have had a growing list of issues that I will post about later today. I will be speaking with the Service Manager in a few moments and feel that I should refrain from commenting on my other issues until I give them the opportunity to resolve.
The Camry V6 uses a conventional 6 speed. As with most other manufacturers using conventional transmission designs,
fuel economy and emmissions are prioritized, and the CPU's job is to optimize these parameters. This gives rise to some unusual shift patterns and characteristics which are more or less noticeable depending on one's style of driving.
That said,I would be interested in knowing the source of your information stating the number of complaints Toyota has received world wide. Could you provide this?
Thanks.
Read the posts here about the people having problems with their transmissions. NONE of them have CVT equipped vehicles. In fact, the only group that seems completely immune from tranny issues and the only ones who don't have to "get used to" their cars are the ones who own the hybrids with CVT.
Thanks, and yes, I have seen reports here. My question, however, concerns the world wide statistics referred to by Jetjockg, but no numbers or sources were provided. Unfortunately, this forum provides only a small sampling, and is not by any means indicative of a worldwide picture. I asked for the source of that broader picture out of curiosity more than anything else.
so, if they don't provide it, then who can provide one which everyone could agree upon?
Sometimes I wonder if there isn't a little too much over the top speculation in forums like this one, but perhaps that's understandable, given the nature of the title. Meanwhile, I digress, so it's back on topic.........
As for world wide documentation of who I quoted--- There are about four articles that have been posted many times on this forum. You must be newbies! Here are a few--
http://www.autoweek.com/apps/pbcs.dll/article? AID=/20061017/FREE/61016020/1024/LATESTNEWS
http://www.iht.com/articles/2006/08/04/business/recall.php
http://www.gembapantarei.com/2006/08/when_did_toyota_get_to_be_a_company_like_th- is.html
http://www.post-gazette.com/pg/06214/710304-185.stm
Also there were two or more TSB concerning Transmissions of different models.
It is difficult to get accurate documentation because as the folks who had the TSB performed know the dealer does not state there is a defective transmission. All they say is recalibrated computer. There is supposed to be a sticker pasted under the hood so other service techs will know. I would like to know how many techs did that.
Ther are other QC issues with the camry like the dash seams are different on both sides.ETC.
http://www.autoweek.com/apps/pbcs.dll/article?AID=/20061017/FREE/61016020/1024/L- ATESTNEWS
Probably not, since the transmission, though adaptive, has a memory span like a Goldfish. But you can MAKE the Camry start in first. All you have to do is romp on the gas....it'll start in first.
Pat
Tell you anything???????
I asked him about the problems they have been having with the 6 cyl models (the one he knows I want) and he told me he had not heard anything other than the first problems they had. He did say it would be a good idea to go ahead and buy the extended warranty just in case. lol You got to love salesmen.
11/14/2006 - 2006 – 2007 model year 4Runner and Sienna vehicles equipped with the Toyota Navigation System produced BEFORE the Production Change Effective VINs shown in this TSB. 2007 model year Camry, Camry HV, and Solara vehicles equipped with the Toyota Navigation System produced BEFORE the Production Change Effective VINs shown in this TSB.
Some customers may experience a condition with their navigation system, where the vehicle icon is intermittently shown on the map in the wrong location. A special DVD map disc with a revised operating system has been developed to remedy this condition.
NOTE: If the customer has purchased a Gen 5 update disc after November 1, 2006, then this TSB is NOT applicable.
New replacement disc #, 5-464210-092
Toyota's quality is being compromised!
All day today the engine braking behavior was most annoying. I take my foot off the accelerator pedal in order to coast to next light or turn, I can feel the engine actively decelarate the car faster than normal -exactly like a manual tranmission does in the middle of lower gears.
What is baffling to me is that it now does it about 7 out of 10 times. The other three times it will coast (freewheel) as I expect it to - like probably all other automatics I have driven over the last 25+ years.
I reiterate: It engine brakes sometimes and not the other times in seemingly identical situations.
I've also experienced this: As I brake from 50 to 40 to 30 to 20, I can actually feel the transmission shift down as I slow down - I feel the jerk from engine braking as the tranny shifts down to match my speed.
Me thinks that aggressive engine braking is the result of keeping the transmission always engaged and matched to road speed so that there isn't the response lag when we want to accelerate (this might be a fix to the lag many of us have complained about).
I also suspect that the sensation that the vehicle speeds up when slowing to a stop mentioned by blindmantoo is the feeling one gets as the transmission temporarily goes into neutral when applying the brake and the initial decelaration forces go from tranny+brake to just brakes.
In other words you are still slowing down but not at the same rate and so in a confusing way the body interprets this as a speed-up sensation.
On a slightly different aspect to this issue, Apart from eliminating the hesitation while it re-engages if should want to speed up immediately, I would like to understand what is gained by not unlocking at the moment of throttle lift say at 35 or 40?
I have the 3rd-4th gear rpm flare.
It started at about 1200 miles, and the car has 2000 miles on it now, and it's not gotten any worse.
It only does it once after starting out cold, and transmission shifts normally thereafter. And I do love the way it works at keeping the engine in the powerband.
I've been reading every forum and post I can find, and nothing seems to fix it. It always comes back.
This transmission is supposed to learn and adapt to the driving style of the driver from what I've read.
My gut feeling is that it'll turn out to be a programming problem.
As to the braking issue, I'm not bothered by it.
The performance gain from having a close ratio 6 speed automatic far outweighs this minor idiosyncrasy. I quickly adjusted to it. YMMV
I know that the rear window defroster works by creating electrical resistance across the metal lines on the window thereby creating heat. The question concerns the top 4 metal line, are they used for the heat or possibly for the radio?
Regards...
You can also check for resistance and continuity with a volt-ohms tester.
Call the local dealership and ask about the top lines. On all my cars the radio antenna is integrated with the rear defroster but all the wires work.
If you find a slight scratch it be repaired with a special conductive paint by dealer, jobber, or maybe yourself if you find it at parts stores.
2014 Malibu 2LT, 2015 Cruze 2LT,
A lot of posters don't even have the vehicle and even more don't have a clue what they are writing.
There is nothing wrong with your defroster!!!!
The top lines on the back window are your radio antenna.
I'm sure it mentions it in your owners manual.
Have a great Thankgiving everyone.
Can someone please tell me if there is indeed supposed to be a light in the glovebox?
At any rate, no, with my car there's still no light even when the car is running. I might have a bad bulb or no bulb at all since I can't seem to find one. :confuse:
That said, I also tried turning the instrument lights on and there's still no light in the glovebox. Suppose I will be taking a trip to the dealer tomorrow morning.
New Throttle Body
- Body Assy, Transmiss
- Ring, O
- Gasket
- Gasket, Transaxle OI
- ATFWS Type WS ATF
Sensor CKT R/R Valve Body Found A Damaged Sensor (on new valve body)removed sensor off Old Body and installed on new valve body.