- #13450 of 14761
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Re: Toyota discontinuing Avalon [bobwiley]
by tjc78
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Feb 13, 2007 (4:52 am)
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Replying to: bobwiley (Feb 12, 2007 5:23 pm)
Bob,
I am not trying to say your car doesn't have a problem, but how do you "step" on the gas while rolling through a yield. Is it a quick "jab" maybe 1/3 way down, or a gentle "roll" of your foot to say 1/3 down? It does make a difference, the accelerator is so sensitive that the computer can get confused quite easily. For example, a quick stab at the pedal followed by an ever so slight reduction in pressure can make the car downshift and rev the engine then immediately cut back the revs. I really think this is what you are feeling. With my Av I had a slight learning curve with the scenario you mention (yield sign) I find the car is most responsive to slow even pressure of the gas pedal, rather than a immediate push to 1/3 or 1/2 open throttle. Of course if I need to merge in a hurry (quite common here in NJ) I just mash it to the floor and get an immediate downshift.
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- #13451 of 14761
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Re: Toyota discontinuing Avalon [rpfingsten]
by bobwiley
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Feb 13, 2007 (7:20 am)
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Replying to: rpfingsten (Feb 13, 2007 4:28 am)
Hey Roland--how ya doing--long time no hear from--ypu've been too quiet!! Yes, I slide the gear shift over into "S" and down shift to "1"--then after I take off and get to 15-20 MPH I just slide the gear shift over to "D"--NEVER a slipping or lurching problem. Try this--next time you come to a stop sign, shift into "S" and down shift to "1st"---take off and just push the lever forward thru 2-3-4-5--once in 5--slide lever over to the "D" mode. Watchout if ya have a "lead foot"--the Avy will fly--so watch the RPM's, be ready to "push" the gear shift forward as you reach higher RPM's and have some fun---it is a ROCKET!! I also use the "S" mode and down shift as I come down the long hill to our subdivision--works great and it's just like using a regular 5 speed without the clutch! I let the engine do some of the "braking" rather than riding the brake pedal for almost a 1/3 of amile. These Ozark hills are steep! Good luck and have fun with the manual shift capability of the tranny--this procedure works GREAT!
Bob
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- #13452 of 14761
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Re: Toyota discontinuing Avalon [tjc78]
by bobwiley
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Feb 13, 2007 (7:33 am)
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Replying to: tjc78 (Feb 13, 2007 4:52 am)
tjc78: This 1st time it happened to me, I'd had the car about 2-3 month's and I'd read about the problem in this Forum. I just figured I was lucky. When it happened to me, I'd come down our long hill, looked left--there is a stop sign and since I can clearly see down the hill, if no traffic is coming, I do a "rolling" stop. Well, imagine my surprise when I let my foot off the brake and applied moderate pressure to the gas pedal and all I heard was the engine revving and me still just rolling along. Then all of a sudden it lurched and I mean "SHOT" me forward to about 35 MPH. I called my dealer after running my errand and of course they'd never heard of the problem. Car was a year old 26 Jan 07. I lodged a complaint with both Toyota and the NHTSA. Of course, Toyota knew nothing of the problem and I've never heard from the NHTSA. Like I've said in the Forum--I just manually down shift to 1st and once going slide the gear shift over to D---NEVER a problem. I duplicated the "quirky" tranny yesterday--it does it EVERY TIME I leave it in D and do a rolling stop and then press on the gas--no matter if it's Light, Moderate or Heavy pressure. I'm now conditioned and my procedure works--I love the ride, comfort, quietness, gas mileage and almost everything else--so I just endure the tranny issue.
Bob
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- #13453 of 14761
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Re: Toyota discontinuing Avalon [fin]
by blackdog4
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Feb 13, 2007 (8:39 am)
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Replying to: fin (Feb 12, 2007 5:50 pm)
Ive had my 2007 limited for 3 months and have had no bothersome problems with the transmission. I have noticed that when coming to a stop, the transmission seems to "release" the engine braking. There is a slight but noticible feeling that the car suddenly looses the engine "drag".This is probably to allow the engine to drop to lower RPM and thus save a little gas.
I have also noticed that in the situation that bobwiley describes, that when I accelerate after slowing to say 10 MPH, the transmission downshifts and the engine revs in away that I would not allow if I were driving a stick shift. This reving is very short in duration, the acceleration is smooth and prompt, so it is not a problem for me. I wonder if changes have been made in the software controlling the transmission in the 2007.
I also have a 1997 Avalon that I still enjoy driving but in my opinion the 2007 is a quantum leap forward
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- #13454 of 14761
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Re: Toyota discontinuing Avalon [blackdog4]
by wwest
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Feb 13, 2007 (11:44 am)
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Replying to: blackdog4 (Feb 13, 2007 8:39 am)
"...This is probably to allow the engine to drop to a lower RPM and thus save a little gas..."
No, that's exactly what I thought at one time. You're losing the engine braking drag because that drag on a FWD vehicle can easily result in loss of control, directional control, if the roadbed happens to be slippery. You may notice that it also happens at higher speeds, the transaxle upshifts upon a FULL lift-throttle event.
Look around, Google for:
wwest "throttle lag" hesitation
For more detail.
Or start by reading the post I just added for the Suzuki SX4 thread.
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- #13455 of 14761
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Re: Toyota discontinuing Avalon [wwest]
by goldsuv
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Feb 13, 2007 (2:43 pm)
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Replying to: wwest (Feb 13, 2007 11:44 am)
Toyota is presenting a paper at a SAE conference in April on Upshift Control Technology. See http://www.sae.org/technical/papers/2007-01-1310 for those interested.
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- #13456 of 14761
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Re: Toyota discontinuing Avalon [wwest]
by captain2
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Feb 13, 2007 (3:19 pm)
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Replying to: wwest (Feb 13, 2007 12:12 am)
no, I was acutally talking about the GS, the Avalon being a larger car in all respects, and much closer to the LS in some. The GS and the Camry are closer in size to each other.
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- #13457 of 14761
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Re: Toyota discontinuing Avalon [bobwiley]
by ange
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Feb 13, 2007 (4:24 pm)
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Replying to: bobwiley (Feb 13, 2007 7:33 am)
Your experience with sudden shift after slowing down and accelerating has happened to me two times. After I slowed down almost to a stop I floored the accelerator and the car stood still and the engine roared for several seconds, then jerked into gear.
This to me is "transmission slipping" for whatever reason you want to use. Worn out clutches act this way and poor computer selection for the shifting timing act this way.. Anyway it happens.
I have used the manual shift a number of times until I found I was in 3rd gear doing 60 mph.
ange
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- #13458 of 14761
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Re: Backup Camera [jlsexton]
by ange
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Feb 13, 2007 (4:46 pm)
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Replying to: jlsexton (Feb 11, 2007 1:44 pm)
The camera is built in at the top of the license frame. It can be adjusted up or down. The lens is about 3/8 inch round and sealed in a glass cover.
There is way to know when you are close. I angled the camera so I could not see anymore ground and still had 12 inches before touching anything.
The electronic box is designed for the Avalon navigation computer unit in the trunk. You disconnect two multiwire terminals and install the box terminals and then replace the Avalon terminals on top. The power source to the camera part comes from the back up wire. When the shift lever is placed in reverse, the back up light gets power and so does the box sending the camera signal to the factory navigation screen. When shifting to drive the normal navigation unit comes on. I had to run wires to fuse box under the dash for power and ground.
I looked at the $100 wireless units. Some can be turned on all of the time or only come on when wired to the back up lights. I was afraid to get one because of the small angle viewed and poor picture quality. I did not want a blank screen mounted somewhere up front.
Check the internet re back up cameras. There many out there.
ange
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- #13459 of 14761
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Re: Toyota discontinuing Avalon [ange]
by bobwiley
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Feb 13, 2007 (6:13 pm)
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Replying to: ange (Feb 13, 2007 4:24 pm)
ange: I'm just tired of the quirky tranny--that's why I use the manual mode. I can't accept the DBW problems--an automatic is supposed to be just that. I'm just glad the Avy has the manual capability. Have you reported your problem to Toyota and to NHTSA. If not, I'd do so and then you have it on record. If enough of us complain--who knows?
Bob
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