Hesitation problem at various speeds (TSB info post #159)
#91
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Originally Posted by toyotaman7
I have the exact same issue with my F sport
#92
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It has a drone and exhaust vibration when I I'm light I the accelerator.
It might be a known issue with some dealers. They just choose to ignore it, hoping it goes away or people get tired of complaining.
They probably fix it for 5RX.
It might be a known issue with some dealers. They just choose to ignore it, hoping it goes away or people get tired of complaining.
They probably fix it for 5RX.
#93
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Don't tell me the f sport had the drone and vibration to. I was going to look at that next.
Some of these salesman think just b/c it has the Lexus logo in the front that the car is perfect. My salesman keep saying how smooth and quiet this RX is.
Some of these salesman think just b/c it has the Lexus logo in the front that the car is perfect. My salesman keep saying how smooth and quiet this RX is.
#94
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Overall, it's not too bad. It does not bother me to much. It goes away if you drive in normal our sport mode.
I do really like the smooth ride and drive. I think this is adv opportunity for improvement for Lexus. Would not be a site stopper for me.
Try the 17. That might be better.
I do really like the smooth ride and drive. I think this is adv opportunity for improvement for Lexus. Would not be a site stopper for me.
Try the 17. That might be better.
#95
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I had mentioned it in another thread, but it appears to me that the droning/vibration is more prevalent when the engine/transmission is cold and trying to warm up. Especially in Normal mode, when the transmission logic tries to reduce the revs by upshifting early; but at the same time, the engine warmup logic is trying to keep the revs up. It causes the whole thing to bog down especially in gears 3-4.
Switching to Eco or Sport mode alleviates this gear-hunting issue, until it warms up fully (usually after 10-15 mins). At the same time, after 3 months and 8000km (5000 mi), it appears the tranny has finally "learned" my driving style - I've noticed that it's holding on to gear 3 a bit longer in the warmup cycle, so I barely get the droning/bogging anymore even in Normal mode.
I don't believe it's any different between F-Sport and regular RX - engine and tranny are the same for both after all.
Switching to Eco or Sport mode alleviates this gear-hunting issue, until it warms up fully (usually after 10-15 mins). At the same time, after 3 months and 8000km (5000 mi), it appears the tranny has finally "learned" my driving style - I've noticed that it's holding on to gear 3 a bit longer in the warmup cycle, so I barely get the droning/bogging anymore even in Normal mode.
I don't believe it's any different between F-Sport and regular RX - engine and tranny are the same for both after all.
#96
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No drone or noticeable vibration here yet, but I do feel the transmission is very slow to accelerate from zero in normal mode if I take it easy on the pedal. The shifts themselves are very smooth. The amount of shifting is a bit ridiculous though. The transmission still wants to upshift at 1400 rpm doing city cruising at 60 km/h. Sport mode solves this problem as it holds the gears a bit longer. Hopefully the shift logic programming adapts soon.
#97
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This is from Lexus website.
"Ratings achieved using the required premium unleaded gasoline with an octane rating of 91 or higher. If premium fuel is not used, performance will decrease."
Apparently, even though Lexus promote 87 Octane as an incentive to buy the RX 350, they actually recommend higher octane for better performance.
People that switched to premium and felt better performance, it's not a placebo effect.
Go here for the source:
http://www.lexus.com/models/RX/speci...350-awd#engine
Scroll down until you see "7.9 SEC"
Click on "0-60 MPH"
"Ratings achieved using the required premium unleaded gasoline with an octane rating of 91 or higher. If premium fuel is not used, performance will decrease."
Apparently, even though Lexus promote 87 Octane as an incentive to buy the RX 350, they actually recommend higher octane for better performance.
People that switched to premium and felt better performance, it's not a placebo effect.
Go here for the source:
http://www.lexus.com/models/RX/speci...350-awd#engine
Scroll down until you see "7.9 SEC"
Click on "0-60 MPH"
I know my '05 did suggest using premium for best performance. I found an increase in MPG using premium but the difference in price between the regular and premium grades exceeded the MPG gain. Back around '05 the price difference between grades was much less. It used to be a $.10 difference between regular and silver and another $.10 between silver and premium. The difference between regular and premium now is much greater. I think gas stations are taking advantage of the increase in turbos that require the higher grade gas.
#99
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If lexus does come out with a trans firmware re flash in the next few months, we will ditch this car.
#100
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Originally Posted by s4iscool
no problem with my f sport regarding ride and noise. The shifts are the bad part. Car can feel like a bad turbo with its non linear and surging power delivery. It's not the engine. All transmission programming. Same with non f sport 350 loaners I've driven.
If lexus does come out with a trans firmware re flash in the next few months, we will ditch this car.
If lexus does come out with a trans firmware re flash in the next few months, we will ditch this car.
Very low chance of them coming out with new firmware. Don't get me wrong, would love to see them improve. But they probably do it only for the mid cycle refresh.
I hear people complaining about the same thing on the 3gen f sport 8 speed. I don't think Lexus fix that either.
#101
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I think they might...i recall reading that the Tacoma got an updated firmware for the poor transmission programming. If the 2017 drives differently, then a TSB could be issued. Hoping! Not sure what else to get because the F Sport has everything we want from a feature standpoint.
#103
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I think they might...i recall reading that the Tacoma got an updated firmware for the poor transmission programming. If the 2017 drives differently, then a TSB could be issued. Hoping! Not sure what else to get because the F Sport has everything we want from a feature standpoint.
#104
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nope. My 3rx was incredibly smooth. Defined lexus smooth. I know what you mean about how you feel. Moderate to hard acceleration is great. If trying to drive economically in stop and go traffic is a frusrating experience. There are some corp customer service email addresses but they always ask to go to the dealer first which is a pain in the butt and waste of time to be told everything's normal. Make multiple trips....try all kinds of fuels, etc and test something lexus should have gotten right. Getting an advocate that cares from corp would be great.
#105
Lead Lap
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nope. My 3rx was incredibly smooth. Defined lexus smooth. I know what you mean about how you feel. Moderate to hard acceleration is great. If trying to drive economically in stop and go traffic is a frusrating experience. There are some corp customer service email addresses but they always ask to go to the dealer first which is a pain in the butt and waste of time to be told everything's normal. Make multiple trips....try all kinds of fuels, etc and test something lexus should have gotten right. Getting an advocate that cares from corp would be great.
Last edited by coolsaber; 11-11-16 at 06:30 PM.