Transmission Deceleration in Coasting?
#1
Driver
Thread Starter
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I wonder if anyone else notices that the RX350 AWD transmission seems to cause deceleration when releasing the accelerator -- until speeds below 21-22 mph when it kicks into a gear that enables easier coasting. My other cars (Volvo RWD and Honda FWD sedans) coast upon releasing the accelerator without such noticeable transmission impedance. The RX350 decelerates while coasting much more quickly -- and it seems to be caused by the transmission. Is this a function of the AWD? Is it adjustable ? My goal is to enable better mpg, i.e. when coasting to a red light down the road?
Thanks for any thoughts.
Thanks for any thoughts.
Last edited by tawm; 12-17-07 at 08:02 PM. Reason: wording
#2
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Tawm:
To confirm your hunch, shift into "N" as you coast [Please do so with caution ... some states require that engine is engaged all the times].
SUV has larger profile, so you can not compare their behaviour with other vehicles
Salim
To confirm your hunch, shift into "N" as you coast [Please do so with caution ... some states require that engine is engaged all the times].
SUV has larger profile, so you can not compare their behaviour with other vehicles
Salim
#3
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I wonder if anyone else notices that the RX350 AWD transmission seems to cause deceleration when releasing the accelerator -- until speeds below 21-22 mph when it kicks into a gear that enables easier coasting. My other cars (Volvo RWD and Honda FWD sedans) coast upon releasing the accelerator without such noticeable transmission impedance. The RX350 decelerates while coasting much more quickly -- and it seems to be caused by the transmission. Is this a function of the AWD? Is it adjustable ? My goal is to enable better mpg, i.e. when coasting to a red light down the road?
Thanks for any thoughts.
Thanks for any thoughts.
#4
Driver
Thread Starter
#5
Lexus Connoisseur
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This occurence was common in our 05 RX330 and even our 08 RX350, both FWD.
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#8
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#10
Driver
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OK thanks G Man, and all for your replies. The strange thing is that the RX seems to coast just fine -- once it gets below the low 20s mph. But I guess its heavier weight and 4WD all add up.
#11
Lexus Test Driver
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If your RX coast fine below 20 MPH, It may be a good idea to test drive another RX AWD and see if it does the same. From my experience, permanent 4WD usually dont coast as well as 2WD.
#12
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2009, 2530, 350, 940, awd, coasting, deaccelerating, deacceleration, deceleration, lexus, makes, mph, problem, rx, sc400, sound, transmission, vibration, volvo