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SUVs Lexus RX 300/330/350 2010 RX 350 Features, driving experiences and Problems
156 messages, Last post on Dec 05, 2009 at 7:43 AM
You are in the Lexus RX 300/330/350 Forum. Your Hosts are steve_ & tidester
Has any one tried using regular gas (87 octane)?
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| Just a quick question. Does the 2010RX350 has the daylight running light like the 2009 model? | |
Is no one else bothered that you cannot play the radio at a decent volume and use the navigation system at the same time?
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Replying to: bv2000 (Oct 14, 2009 12:22 pm) My 2005 RX didn't have this problem. Wes
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Replying to: wrahn (Oct 14, 2009 12:36 pm)
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Replying to: wwest (Oct 08, 2009 11:53 am)
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Replying to: rparis (Oct 14, 2009 2:17 pm) Yes. The volume of the device you are playing remains the same when the NAV "speaks". If you like loud music, then you'll have a hard time hearing the NAV instructions. (Of course, you can always do a U-turn and then turn the device off and when the NAV repeats the instruction you'll hear it). JOKE! As it stated before, my 2005 didn't have this problem. Wes |
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Replying to: juschecking (Oct 15, 2009 4:07 am) Yes, at least partially. Most of the time the Venza and new 2010 RX350 (and the Ford Escape, Escape hybrid, Mercury Mariner, Mariner hybrid, Mazda Tribute, CX-7) F/awd systems only drive the front wheels. The exceptions are: 1. As you accelerate in a straight line from a stop or from a very low speed the coupling to the rear might be as high as 100%, 50/50 F/R. On a highly tractive surface this will undoubtedly result in some minor level of driveline windup and/or tire scrubbing. But "this" is being done as a preventative measure, pre-emptive engagement of engine drive torque to the rear to reduce the potential for loss of traction were the torque ONLY applied to the front wheels. FWD vehicles, especially hybrids (low speed torque in ABUNDANCE, have too great a propensity for loss of control should the roadbed "happen" to be slippery. The vehicle systems, VSC/Trac/VDIM have no method for detecting road conditions in advance so the rear drive is coupled in only on the chance of encountering a slippery roadbed. 2. Non-straight-line acceleration from a low speed or from a stop. Due to the rather SEVERE level of driveline windup and/or tire scrubbing that might result it is highly unusual for an "AWD" system to have both front and rear drivelines engaged in an accelerating low speed turn, "tight" turn, as these new F/awd systems often will. 20% seems to be the common number. Compromises, be damned if you do and be damned if you don't. As everyone should know, driving only the front wheels in this circumstance will result in TONS of torque stear while also raising the potential for plowing, understearing, dramatically. But then with a "strong" engine, or a hybrid, the danger from loss of control due to front loss of traction when ONLY the front wheels are driven rises rather dramatically. So, the compromise, introduce a slight level of driveline windup and/or tire scrubbing in order to reduce torque stear and the inherent HAZARDS of FWD with a HIGH torque capability. 3. "This one" really should have been listed first but on the other hand it is also the one most undesirable. When in FWD "only" mode and upon detection of wheelspin/slip due to the use of too much engine drive torque for traction conditions TC will react (REACT...!!) INSTANTY by fully dethrottling the engine, applying braking to the slipping wheel(s), and in the F/awd case increasing the drive torque coupling to the rear driveline. "3" is the traditional F/awd mode, the ONLY mode, remaining in use, for the moment, on the HL and Sienna. This is also the mode that has led to the massive public outcry that finally resulted in the availability of a PB whereby TC could be disabled. Absent the ability to disable TC these vehicles simply left you "dead in the water" when trying to "escape" from an all wheel slippage surface condition. The MIXED bag. Many of the earlier implementations of this new F/awd system gave the driver the ability to engage the rear drive system at speeds up to ~25MPH. Especially useful off-road when speeds are traditionally quite low an/or in KNOWN slippery road conditions. Apparently many drivers didn't follow instructions and the PTO would overheat and go TU accordingly. Some marques reacted by eliminating the driver's ability to engage the system manually. Others (Ford) eliminated the switch AND used firmware revisions to derate, reduce the overall functionality of the F/awd system. Mazda, at least for the 244HP F/awd CX-7, added water cooling to the PTO such that it was unlikely to fail if used continously, off-road, or even inappropreately. The RX350 has the PB switch so the rear driveline can be manually engaged until/unless the speed is above 25MPH. The Venza does not. Apparently Lexus drivers can be tested to use the F/awd mode judiciously, while the Venza drivers cannot. It will be interesting to see, watch, just how long it will take Lexus to either add the PTO cooling or eliminate the switch. It is also interesting to note that the newest Porsche 911 series uses this same electromagnetic clutch design to implement the C4's R/awd system. proportional, linear, control of the level of front drive torque supplied.
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Replying to: wwest (Oct 15, 2009 8:48 am)
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Replying to: juschecking (Oct 15, 2009 12:35 pm)
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