GS - 3rd Gen (2006-2011) Discussion about the 2006+ model GS300, GS350, GS430, GS450H and GS460

question about uphill driving

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Old 03-22-12, 10:07 AM
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LADavidGS
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Default question about uphill driving

I know that 3gs have the hill assist but I am having a problem upon a uphill where my car shudders when accelerating. Is this normal? There are no lights flashing, just shudders only going up a hill.
Old 03-22-12, 12:26 PM
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patricksr5
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I have no problems going up hills. Not normal. Are you using Premium gas and if so good gas? Might try a tank of 2 of Chevron or Shell and see if the problem persists.
Old 03-22-12, 05:57 PM
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LADavidGS
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i always use 91. Just came back from dealership and they told me that its normal for the car have shudder when going up the hill. Is this valid? I never had such problem with my other cars.

Last edited by LADavidGS; 03-22-12 at 06:05 PM.
Old 03-22-12, 09:53 PM
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LenniePaz
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Originally Posted by LADavidGS
i always use 91. Just came back from dealership and they told me that its normal for the car have shudder when going up the hill. Is this valid? I never had such problem with my other cars.
Does it do it going up hills around 15-20mph?
Old 03-23-12, 12:59 AM
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LADavidGS
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it only happens when @ full stop going up hill. When accelerating, the car jolts with a hard thud: almost the car is looking for a gear. I checked with a local lexus dealership and they told that its normal for 3gs to have such issue. I am having a hard time believing such where I never had such problem with my other cars before.
Old 03-23-12, 03:42 AM
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hypervish
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The thud may just be the car downshifting.

To avoid that jolt, try and get the car into a lower gear before approaching the hill.
Old 03-23-12, 10:09 AM
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LADavidGS
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Originally Posted by hypervish
The thud may just be the car downshifting.

To avoid that jolt, try and get the car into a lower gear before approaching the hill.
So, do I shift manually when accelerating from full stop going up hill?
Old 03-23-12, 08:26 PM
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mrbulk
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Originally Posted by LADavidGS
I know that 3gs have the hill assist but I am having a problem upon a uphill where my car shudders when accelerating. Is this normal? There are no lights flashing, just shudders only going up a hill.
The GS has hill assist? I thought it was only the LS?
Old 03-23-12, 10:09 PM
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sourwich
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my car like that too
Old 03-24-12, 12:39 AM
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LADavidGS
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strange, i never had with such problem.
Old 03-24-12, 10:35 AM
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LADavidGS
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Originally Posted by mrbulk
The GS has hill assist? I thought it was only the LS?

sorry i meant, Hill - Start assist control system (owners manual page 429)
Old 03-24-12, 04:03 PM
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mrbulk
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Originally Posted by LADavidGS
sorry i meant, Hill - Start assist control system (owners manual page 429)
Ahh, got it. Mine is on page 169.
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