why the intelligent tranny annoys me...
10-12-06, 08:27 AM
#31
I noticed the same thing. I think it has to do with the pedal, well in my car anyways. I notice that when I push the pedal down 3/4 the way I don't get the womp. However, if I push it all the way to the floor which feels like a foot it takes off like a bat out hell. I know it sounds simple but try it.
10-12-06, 08:54 AM
#32
Notice if you place your car in power mode, it gear hunts more as speed varies, than it does in standard mode. Power mode more offers the response that some individuals want when they hit the go pedal, but that comes at the expense of a smoother ride- constantly jerking as torque is applied, while pulling back as the throttle is closed. I can say with a bit of certainty, that the tranny and its techonlogy isn't at fault here, it's just typical "Lexus" at work- Luxury/smoothness first, performance next. Standard mode offers lesser amounts of gear hunting, and to greater degree, snow mode less than standard...but both come at the expense of slower acceleration, where the car can utilize fewer gears to reach the same speed.
10-12-06, 09:11 AM
#33
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hmm.. after reading this. i was wondering why when i test drove the 350 i wasn't so impressed... i thought you guys overhyped it or it was just overrated because i was expecting a big diff from my 250 but when i floored the 350 at the dealership test drive, i wasn't impressed at all.
anyway i'm glad i dont' have that problem~
anyway i'm glad i dont' have that problem~
10-12-06, 11:17 AM
#34
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Ok so here's a theory:
Some people have complained that during the 650 mile break-in period, the tranny learns to become pretty conservative. What if you constantly drove the new car in Sport mode shifting on your own. Would this prevent the tranny from learning your driving habits until you pass 650 miles and are able to drive like you would normally?
I know it would be annoying to drive like that for the first 650 miles, but in theory it could work.
Some people have complained that during the 650 mile break-in period, the tranny learns to become pretty conservative. What if you constantly drove the new car in Sport mode shifting on your own. Would this prevent the tranny from learning your driving habits until you pass 650 miles and are able to drive like you would normally?
I know it would be annoying to drive like that for the first 650 miles, but in theory it could work.
10-12-06, 12:05 PM
#35
hmm.. after reading this. i was wondering why when i test drove the 350 i wasn't so impressed... i thought you guys overhyped it or it was just overrated because i was expecting a big diff from my 250 but when i floored the 350 at the dealership test drive, i wasn't impressed at all.
anyway i'm glad i dont' have that problem~
anyway i'm glad i dont' have that problem~
10-12-06, 01:12 PM
#36
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10-12-06, 01:27 PM
#37
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Sorry, but I think you're all on crack. I drove my car plenty conservatively during break-in. I also drive it pretty conservatively on a daily basis on my commute to work.
However, when I romp on it, the last thing I'd think was that it's slow or that the tranny is doing anything other than what I want and/or expect it to do. Of course, I drive 100% of the time in Sport shift mode, so perhaps I'm avoiding whatever issue it is you're all having.
However, when I romp on it, the last thing I'd think was that it's slow or that the tranny is doing anything other than what I want and/or expect it to do. Of course, I drive 100% of the time in Sport shift mode, so perhaps I'm avoiding whatever issue it is you're all having.
10-12-06, 06:37 PM
#38
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Again, I don't get it. My IS250 downshifts immediately as soon as I hit the gas. You want slow? Just try it in a Mercedes. You can count to three before it downshifts and by than it doesn't matter cause your already screwed. Horrible transmission. The Lexus downshifts as fast as any I've ever seen in my 67 years.....
10-13-06, 08:33 AM
#39
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Again, I don't get it. My IS250 downshifts immediately as soon as I hit the gas. You want slow? Just try it in a Mercedes. You can count to three before it downshifts and by than it doesn't matter cause your already screwed. Horrible transmission. The Lexus downshifts as fast as any I've ever seen in my 67 years.....
10-13-06, 09:40 AM
#40
Again, I don't get it. My IS250 downshifts immediately as soon as I hit the gas. You want slow? Just try it in a Mercedes. You can count to three before it downshifts and by than it doesn't matter cause your already screwed. Horrible transmission. The Lexus downshifts as fast as any I've ever seen in my 67 years.....
Aloha,
Larry
10-13-06, 10:08 AM
#41
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Ok so here's a theory:
Some people have complained that during the 650 mile break-in period, the tranny learns to become pretty conservative. What if you constantly drove the new car in Sport mode shifting on your own. Would this prevent the tranny from learning your driving habits until you pass 650 miles and are able to drive like you would normally?
I know it would be annoying to drive like that for the first 650 miles, but in theory it could work.
Some people have complained that during the 650 mile break-in period, the tranny learns to become pretty conservative. What if you constantly drove the new car in Sport mode shifting on your own. Would this prevent the tranny from learning your driving habits until you pass 650 miles and are able to drive like you would normally?
I know it would be annoying to drive like that for the first 650 miles, but in theory it could work.
Dont know about others, but my tranny adjusts to my driving habits really quickly... i'd say within a day or so. When I drive hard, it learns quick that I wanna go fast. On the otherhand, when I'm on a quarter tank of gas, and I wanna take it slow, being light on the gas pedal changes the tranny from crazy to calm... at least in my opinion. I guess I just don't have a lead foot.
10-13-06, 01:45 PM
#42
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There's no "delay" but the throttleplate doesn't move like a cable operated unit. It will remain more closed than you would expect to improve intake velocity and prevent poor emissions. There are a couple of benefits to this, first is you can use a bigger throttlebody than if it were cable operated, second is, you can keep a much tighter rein on emissions. Keep in mind, the intake cam timing is a moving target, and the throttle position is related to the intake cam timing, so there's a whole lot of monkey motion and balancing act going on when you step on the pedal and tell the ECM you want to go faster.
10-13-06, 06:12 PM
#43
Damn this is a long thread with a lot of non-information...
I think lobuxracer hit on this in one of his posts, but you can just leave the tranny ECU's backup fuse out all the time if you don't want it to learn "bad things". There are TONS of auto performnace enthusiasts driving around in all sorts of cars with missing ECU backup fuses. Otherwise, you can just make sure you only use ECT-PWR mode when you really mean it.
I think lobuxracer hit on this in one of his posts, but you can just leave the tranny ECU's backup fuse out all the time if you don't want it to learn "bad things". There are TONS of auto performnace enthusiasts driving around in all sorts of cars with missing ECU backup fuses. Otherwise, you can just make sure you only use ECT-PWR mode when you really mean it.
10-17-06, 05:09 AM
#44
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Toyota released a TSB!
Hey guys, I was just reading that Toyota released a TSB for what seems to be the same issue on the ‘07 Camry. The fix is a software upgrade and it solves the problem. I wonder if they will release one for our Lexus?
http://www.autoblog.com/2006/10/17/c...boot/#comments
http://www.autoblog.com/2006/10/17/c...boot/#comments
10-17-06, 05:17 AM
#45
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At least I know that i'm not the only one this is happening to now... it's a relief (in a sense), but again... this shouldn't be happening to anybody.
As far as the electronically controlled throttle... I never even thought about that, and it's a very logical suggestion. I will bring this up with the lexus dealer. But if it's "learning" is similar to the tranny, then it looks like i'll have to do the same, and keep disconnecting the battery.
Anyway, to answer Shinobi's question: I can be driving on the highway at 65 mph in 6th gear (around 2.5 rpms) -
As far as the electronically controlled throttle... I never even thought about that, and it's a very logical suggestion. I will bring this up with the lexus dealer. But if it's "learning" is similar to the tranny, then it looks like i'll have to do the same, and keep disconnecting the battery.
Anyway, to answer Shinobi's question: I can be driving on the highway at 65 mph in 6th gear (around 2.5 rpms) -