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Sedans Toyota Avalon 2008 Toyota Avalon
634 messages, Last post on Nov 30, 2009 at 10:42 AM
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Replying to: 4936 (Jul 29, 2008 6:40 am) That's what I did however doing so made me nervous, (had the rear retainers broke $ for new air box). I also would have liked to vacuum out the air box. Thank you for your reply. Still looking for proper procedure for removing engine air filter cover from '08 Avalon! Ray
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Hi. Have an '08 which has about 16K miles on it. Was one of the first '08's "off the boat" when I bought it. Was a bit nervous about buying one of the first cars with the new 6 speed auto transmission, and I may have been justified. Transmission in mine slips when shifting. Usually during the 2-3 and 3-4 shifts under light throttle. Not every time, but happens on a daily basis. Usually the "slip" (a surge in rpm until the tranny engages the next higher gear) is a few hundred rpm, but once in a while it's much more dramatic--really a case of getting caught in neutral for upwards of a second or so. I've asked the dealer to look at it twice. First time they could not reproduce the problem. Second time they said there was a new service bulletin which involved erasing the memory, allowing the tranny to "relearn" my driving style. Problem persists. Searching this forum showed one possibly similar case from "Arthur" in February, but his problem apparently resolved spontaneously. I believe there were some issues with the 5 speed which were in some cases fixed by "reflashing" but not aware if that applies to the '08 6 speed. If it does, what's the protocol for reflashing? Anyone else experienced this, or better yet, anyone had the problem and had it fixed?
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Replying to: mlingga (Jul 29, 2008 5:41 pm) It appears that Toyota is still struggling with finding the "sweet spot(s)" wherein the CORRECT line pressure is available according to the up/down shift requirements of the moment and under the myriad of varying conditions. And it isn't YOUR driving style the engine/transaxle will need to "relearn" after the memory erasure, but the line pressure control solenoids PWM duty cycle for controlling the exacting line pressure for all of the conditions/situations. And that's going to take more than 2 or 3 drive cycles, it will likely take more than 500 miles. But the problem may very well be that the gear type ATF pump that Toyota is using does not have enough volume/flow capacity to provide the QUICK change in line pressure required at certain times and situations. Time, and the ECU "relearning" process, will tell. My guess will be that on your next trip to the dealer they will be changing out at least one of the line pressure control solenoids. Ford solved this very same problem, seemingly, by adopting a variable displacement ATF pump.
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Replying to: wwest (Jul 30, 2008 9:28 am) In the meantime, here's my question: how damaging over the long run is this "loose" shifting for the transmission? Am I causing accelerated wear or risking early failure as long as this continues? And if I read you correctly, if the problem persists past the 500 mile mark, then I may be in for a battle and replacement of solenoids. Since few other '08 owners seem to be complaining, I'm hoping it is a fixable problem, not something intrinsic to this transmission. Thanks.
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Yes, I would expect accelerated clutch wear under the circumstances you stated but then it apparently only occurs under light throttle.... Slippage in other than 3-4 upshifts would indicate your situation is unique compared to the more common "failure" complaints being posted so I would suspect a sticking/sticking line pressure control solenoid. Has it done this for the entire 16,000 miles or is it a more recent development??
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Replying to: mlingga (Jul 30, 2008 11:15 am) yadda............WENT UP THE LADDER AT tOYOTA MAIN OFFICE SAME THING Now have 9000 miles on it I drive it hard but not enough to hurt it So....here's the deal Heard it on this forum I don't think any one had actually tried it You can 0 your computer by disconecting the battery I did and it worked well for anoyher 3000 miles... did it again and it is still doing well It never went back to the original factory settings (which I though were perfect) But It certainly made a positive difference and I can't see where it can hurt anything even though we should'nt have to do it Any body else tried this........It worked .Kind of GOOD LUCK Burl |
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Replying to: wwest (Jul 30, 2008 12:46 pm) wwest: it's been true almost, if not the entire time I've had it. I can't remember clearly enough the very early weeks I spent driving it well enough to be sure. After having read your prior post, I have been obsessively watching the shifts, as I'm about 800 miles out from the last service, and I think there may be an improvement--seems like the rpm blip is now more in the 100-200 rev range, rather than previously when 300-500 rpm surges were more common. But...it's an intermittent problem so I'll keep watching. While the 3-4 shift is the most commonly affected I am confident that other shifts, mainly the 2-3, also slip. If this problem persists, I will print out your posts and take it to my dealer next time (sign of the times when you get better service online than from the dealer!). Thanks again, it is truly appreciated. |
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My parents purchased on 08 Avalon XL in April. They do not drive very much and only now have 1,700 miles on it. Twice during this period, the battery has died. They replaced the first one saying it had a dead cell. After the second time, they have said everything checks out normal, that they are no driving it enough. They drove it a good bit on Tuesday and only a 2 mile trip on Friday. The following Sunday it was dead. I do know that the car is using juice at all times and will eventually after an extended period of time will drain the battery of juice. What we do not understand is that only a couple of days draining the battery completely. My parents are in their middle to late 70s. They were told by the service department to keep a trickle battery charger on the unit. I am in my 50s and that would be more work than I would expect to be doing. They bought the Toyota after having a 1995 Town Car for 13 years. They are very upset with the Avalon not being very reliable. They expect a car to start every time and so do I. Especially after only sitting for a few days. I am wondering if anyone else has had this occur. I do understand that if their is an intermittent problem that did not occur when we had it in the shop, they will be at a loss to determine the problem.
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Replying to: redmazda3 (Aug 12, 2008 5:54 am) |
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Just returned from a 4500 mile trip to Upper Michigan. My 2008 Avalon Limited gave me 33 MPG cruising under 80 MPH using fuel without ethanol. Upon our return trip to Florida I could not locate ANY fuel without ethanol and my mileage dropped to 26-29 MPG. So much for ethanol.....
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