Last post on Nov 09, 2013 at 5:09 AM
You are in the Toyota Camry
What is this discussion about?
Toyota Camry, Sedan
#4100 of 5646 Re: 2007 V6 XLE Camry downshift at low speeds [toby33]
Oct 16, 2007 (9:29 am)
"It almost feels like a surge..."
That's because it really is a "surge".
Historically, circa ~2001, it has been referred to as being "bumped slightly from behind" (10-0MPH), or a "slingshot effect" (40-30MPH).
According to the Toyota or Lexus shop/repair manuals as you coast down with closed throttle, braking or not, say 10-0 MPH, or 40-30, your transaxle is PROGRAMMED to upshift into a higher gear ratio.
There are several possibilities for this shift pattern/schedule change in the engine/transaxle ECU control firmware.
A) An upshift to lower the effects of engine compression braking will undoubtedly extend your coasting distance if that should happen to be your intent and therefore an improvement in FE.
B) On a slippery roadbed a significant level of engine compression braking on the front wheels could result in loss of directional control and thereby oftentime a serious accident. Ford was just granted a US patent for a technique involving a significant reduction in regenerative braking should the OAT be hovering around or below freezing in the FWD Escape and Mariner hybrids.
C) The positive displacement gear type ATF oil pump within the transaxle can be a HUGE consumer of energy, needlessly, hour upon hour, simply cruising down the hwy. So the sizing of this oil pump can be quite critical to FE. Eliminating certain shift sequences, mainly those that REQUIRE a quick and firm "clutch seating" (HIGH torque conveyance), but with the engine at idle or close by, allows this oil pump to be downsized significantly.
Ford (again??) has recently adopted a variable displacement ATF oil pump in the new FWD Ford Edge apparently to overcome this very problem.
D) ALL OF THE ABOVE
#4101 of 5646 Toyota reliability declines according to CR
Oct 16, 2007 (11:04 am)
Toyota's reliability has declined from 1st place to 5th place according to Consumer Reports.
Consumer Reports said it no longer recommends V6 versions of Toyota's Camry or V8 versions of its Tundra pick-up because of poor reliability.
CNN Article on Toyota's Reliability
#4102 of 5646 Re: Toyota reliability declines according to CR [teamtbo]
Oct 16, 2007 (12:26 pm)
Well guys for those out there that bad mouthed your hesatation problems and other problems and said it was just in your head. Congratuations, you are now vindicated.
#4103 of 5646 Re: Toyota reliability declines according to CR [dmathews3]
Oct 16, 2007 (1:24 pm)
Is it just me or is Toyota starting to sound more and more like a 70s and 80s domestic car maker. Complacent. Boring designs. Unnecessary cost cutting.
One can only hope that Toyota starts a turnaround, and quick.
#4104 of 5646 Re: Toyota reliability declines according to CR [teamtbo]
Oct 16, 2007 (2:31 pm)
Honda, Honda, Toyota, Subaru, Toyota... What's the big news here?
#4105 of 5646 Re: Toyota reliability declines according to CR [lucky_777]
Oct 16, 2007 (3:24 pm)
The big news for me is:
1. That the reliability for the Toyota branded cars has decreased from 1st to 5th place. That is significant. I have seen and experienced first hand the slip with my 2007 Camry V6 - which is on attempt #4 to fix the shift flare.
I wonder if Toyota Corporate will notice that their low end brand, Scion, is above the Toyota brand in reliability.
2. That CR does not recommend the Toyota Camry V6 - I am thrilled that CR is telling it like it is. Maybe it will save someone from the heartache I have experienced with my $30,000+ car.
3. Maybe Toyota will see what is happening and make some necessary changes.
#4106 of 5646 Re: 2 questions [dmathews3]
Oct 16, 2007 (4:25 pm)
Yes the OEM tires are of a very ery soft compund, based on a treadware rating of 260..
I had the same problem in my 04 Accord, new tires needed by 2 years or so. I would have no problems buying new treads but not on a car thats less than 12 months old. I can get by another winter but at what cost? It might last another year but how low of a tread do I want to let my wife drive on. Like I posted b4, Iam pretty much done driving my, MY new Camry, I drive her 05 CR-V.
#4107 of 5646 Re: Toyota reliability declines according to CR [teamtbo]
Oct 16, 2007 (7:01 pm)
I just want to say I too am feeling the pain of buying a $30,000 car and not having Toyota fix the numerous problems including my Transmission.
#4108 of 5646 Re: 2007 V6 XLE Camry downshift at low speeds [wwest]
Oct 17, 2007 (5:24 am)
You are exactly right. The shift happens when I would expect a downshift but it does feel like an upshift. I suppose it is reassuring to hear that it should be doing this but it is difficult to get used to. We had a 2004 Sienna that did not do this or at least it wasn't as noticeable. We are going to have the TSB applied next week and see if that smooths things out.
Thanks for the information on both your postings.
#4109 of 5646 Re: Toyota reliability declines according to CR [teamtbo]
Oct 17, 2007 (6:20 am)
Toyota is well aware of quality problems unfortunatley it took them a while to admit that. This is from Toyota Highlander press release.
"Customer First" Quality
As vehicles become increasingly complex, Toyota has realized the need to re-vamp the engineering and manufacturing processes. In 2005, President Katsuaki Watanabe took the reigns of Toyota Motor Corporation (TMC) and issued a company-wide challenge to re-prioritize product quality.
The initial steps to guide the quality enhancement agenda began with engineering innovation. He tasked each TMC chief engineer to offer new ideas to improve quality. Everything from tools and processes to budget, was open to discussion. The result was a company-wide agenda called "Customer First."
The program re-allocated assets, allowed more development time, increased headcount, and reverted to the use of additional prototypes to gauge quality during development. Raw materials were reconsidered and assembly was extensively analyzed.
The Highlander development program served as the pilot and featured three critical criteria. First, the process of producing the most comprehensive and accurate original drawings possible was given the top priority. The vehicle would only be as good as the quality of the blueprints.
Second, Toyota accelerated prototype production, increased the number of prototypes, and enlarged the number of quality-check personnel four-fold.
Finally, with these changes, Toyota was able to devote an additional month in the development schedule to address countermeasures.
HL press release
Looks like this approach working out well with new HL since there is no complaints on it's quality so far. Camry team have some catching up to do.