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2007 Toyota Camry Transmission Questions

851 messages,  Last post on Nov 01, 2009 at 2:21 PM

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#839 of 851 Re: TRANSMISSION QUESTION! [djm2] by wwest Nov 24, 2008 (9:04 am)
Replying to: djm2 (Nov 24, 2008 3:57 am) If the "flare" is the result of a poorly engaged clutch or clutches, say as a result of low ATF pump pressure(***), then premature failure of the/those clutches would be the expected result.   On the other hand if the problem should prove to be simple idiocy, say leaving the transaxle in "neutral" for a brief period, on the part of the firmware programmers then I would expect no premature failures.   *** To improve FE the ATF pump pressure regulation is now under constant, "real time", control of the engine/transaxle ECU firmware via the use of a PWM electric solenoid. The lower the engine torque is at a given moment the lower the ATF need be to hold clutches from slipping. An upshift from 3rd to 4th would clearly imply/allow a LOW ATF pressure. Replies to this message: djm2 (Nov 25, 2008 4:32 am) wwest (Nov 25, 2008 9:49 am)
#840 of 851 Re: TRANSMISSION QUESTION! [wwest] by djm2 Nov 25, 2008 (4:32 am)
Replying to: wwest (Nov 24, 2008 9:04 am) Good Morning WWEST:         QUESTION: ---- If the driver of the vehicle with the problem was to shift the transmission manually from 1 to 4, would they experience the 3 to 4 "flare" either shifting up or shifting down, (3 to 4 / 4 to 3)? ------- If no "flare" is experienced in manual mode, I would think there are a few possibilities for this occurrence! ---- 1.) In the manual mode, there is another holding device coming on in each gear that is not normally "on" in the automatic drive selection mode. ---- or ---- 2.) There is a higher apply pressure to the holding components, thus no "flare" ---- or ---- 3.) There is no "scheduling valve participation" in the shifting process between gears, since the shifting is being determined by the driver. ---- If I had to guess, I think that the transmission is going into a "neutral" for a split second, (that is no holding device "on" in the gear sets)! ----- Reason, ---- if a vehicle had a pressure problem and it had 40,000 + miles, there would be postings on this site about major transmission failures, since the vehicle in question is a 2007 model. In the absence of these postings, I believe there is a scheduling problem on the 4 to 3 downshift and the 3 to 4 upshift when navigating slowly on the city streets. (The throttle opening and the speed of the vehicle does not send a sensitive enough message to the computer to select an appropriate gear, thus the computer gives the vehicle a "neutral"!) I would bet that a driver could force a smooth / positive up-shift on the automatic side of the selector, by accelerating hard, and as the vehicle is picking up speed, slowly backing off on the throttle, (thus decreasing throttle pressure), and allowing governor pressure to force a up-shift! ---------- What do you think?        Best regards! ------------ Dwayne Replies to this message: wwest (Nov 25, 2008 9:49 am)
#841 of 851 Re: TRANSMISSION QUESTION! [djm2] by wwest Nov 25, 2008 (9:49 am)
Replying to: djm2 (Nov 25, 2008 4:32 am) Yes, I would guess that if you accelerate rapidly up to a speed that "denotes" the use of 4th gear and then let off the gas the flare would not happen. The "instant" you let off the gas the engine torque load (and RPM) will be UP and therefore the ATF pump will have HIGH flow capacity and with the engine torque at that level the pressure control will hold at a higher level.   In a normal case, normal, "easy" rate of acceleration, the engine torque load and RPM is getting lower and lower as you climb up in gear ratios. Once you reach 4th gear range the ability of the engine driven ATF gear type oil pump to provide sufficient flow/pressure has become quite low, in comparison.   Should there be any reason for a delay of the next upshift, say you lift the throttle slightly in anticiation of having reached your speed "goal", the ECU firmware might ease off the real time pressure regulation/control (ECU:.."do I need to remain in 3rd or 3rd and lockup..??") and now ATF pressure will need to be "rebuilt" from scratch once the ECU determines an upshift to 4th is required.   Just a guess....
#842 of 851 Re: 2007 camry 4cylinder trans [mcdawgg] by vizyo Aug 23, 2009 (5:29 am)
Replying to: mcdawgg (Aug 12, 2008 8:18 pm) I had hesitation with my Camry 2007 LE 4 cylinder. I had ECU reprogrammed from 333A5000 to 333A5100, which is T-SB-0068-08. Response of the tranmission seems to be improved when I accelerate; however I still have a problem with shifting when I do "stop" and "go" at the stop signs in the city. After a full stop, when I accelerate, shifting from the first gear to second is not smooth and the car badly vibrates. This occurs after about half an hour driving right at the beginning of the acceleration (7~8mph) from full stop. When the engine is cold, It does not do it. I found some additional TSBs on the forums (TSB 0068-09 & EG036-07) thinking that it would fix the problem and took the car to dealer. They checked it and noticed the problem. They searched a new TSB over TSB 0068-08 and they could not find anything newer. They told me that TSB 0068-08 was the final TSB fixing all tranmission issues on 2007 Camry. I really want to know if the latest ECU code for 2007 Camry 4 cyclinder is 333A5100. Is there any other new TSB for the tranmission issues after 0068-08? Please help.
#843 of 851 Re: TRANSMISSION QUESTION! [djm2] by emilyb28 Sep 21, 2009 (7:44 pm)
Replying to: djm2 (Nov 24, 2008 3:57 am) I have an 07 camry v6. I currently have 77,000 miles on the car. The transmission totally failed this weekend. I had no previous problems. Totally loved the car. On Friday it started acting up and by sat I couldn't even drive. Once in 3rd gear it shifts like crazy trying to find the gear. I took it to Toyota and they will not fix the car because I am 4000 miles over my warrenty. I contacted toyota Corp and they will not do anything. I found the service bulletin and stated that my car is in the effected vin period with the faulty transmission and still nothing. They want me to pay $6000 in parts alone. If anyone can please help me with advice on how to persue a claim I would really appreciate it. I bought the car used a year ago and just don't understand how they could put a car on the road that they knew had problems. Thank you. Emily Replies to this message: djm2 (Sep 27, 2009 10:59 am) djm2 (Sep 28, 2009 12:22 pm) emilyb28 (Sep 28, 2009 2:01 pm)
#844 of 851 Re: TRANSMISSION QUESTION! [emilyb28] by djm2 Sep 27, 2009 (10:59 am)
Replying to: emilyb28 (Sep 21, 2009 7:44 pm) Hi emilyb28         Since I have the same vehicle, I am interested in the story. My 2007 XLE V6 Camry now has 53,250 miles, and I have never had the transmission issue that you read about on these boards.                                                                   Best Regards Dwayne
#845 of 851 Re: TRANSMISSION QUESTION! [emilyb28] by djm2 Sep 28, 2009 (12:22 pm)
Replying to: emilyb28 (Sep 21, 2009 7:44 pm) Hi emilyb28        How are you dealing with this problem? ----- Has Toyota offered any assistance? ----- Best Regards ---- Dwayne Replies to this message: emilyb28 (Sep 28, 2009 2:01 pm)
#846 of 851 Re: TRANSMISSION QUESTION! [djm2] by emilyb28 Sep 28, 2009 (2:01 pm)
Replying to: djm2 (Sep 28, 2009 12:22 pm) No Toyota has not offered me any assistance. I filed a claim and after their investigation they returned my call and stated that since the amout is so much and I'm over my warrenty that they are not going to help me. I told the man on the phone that Toyota should stand behind its product and fix it since they knew it was a problem and infact that it should have been recalled. He replied back with "it wasnt a guarantee that it would happen to every vehicle and Toyota has no problem standing behind their product but since I'm over warrenty its now my product." I am currenty looking into a class action law suit. It may take a while to get it going because of the amount of people there are with this car but I dont think it is right they put a product out that cant stand up to its name. Its ridiculous how they have handled it.
#848 of 851 Post moved by pat HOST Sep 29, 2009 (5:25 am)
Here's the link: greeneye1, "Older Camry Maintenance and Repair" #530, 28 Sep 2009 8:11 pm.

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