Instability on highway
Lexus Champion
Joined: Sep 2001
Posts: 1,808
Likes: 1
From: California
What the hey, I'll add my 2 cents...
First, all the vehicles I have ever owned exhibit the same unstable behavior when being passed or passing a big rig as described. Second, I don't think it's simply that the GS stock suspension sucks, its more that the car is so darn capable of exceeding the stock suspension that gets everyone into trouble. Third, my GS has also been in the shop more than ANY other vehicle I have ever owned. The difference is in the service and the fact that every major issue has been quickly addressed and a Lexus rental provided during any down time. I may be in trouble when my extended warranty expires in 9 months.
First, all the vehicles I have ever owned exhibit the same unstable behavior when being passed or passing a big rig as described. Second, I don't think it's simply that the GS stock suspension sucks, its more that the car is so darn capable of exceeding the stock suspension that gets everyone into trouble. Third, my GS has also been in the shop more than ANY other vehicle I have ever owned. The difference is in the service and the fact that every major issue has been quickly addressed and a Lexus rental provided during any down time. I may be in trouble when my extended warranty expires in 9 months.
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Lexus Champion
Joined: Dec 2002
Posts: 2,854
Likes: 0
From: IL
Two things
1. I don't get a push/pull as described while passing (that is totally normal especially with a crosswind). I get a choppy/loose feeling from the rear of the car when I am in the vicinity of the trucks (normally, with one on my side and one up front) - almost feels like the rear of the car is being lifted.
2. I would be curious to know if the people who don't have this problem have the rear spoiler. It would seem to me that that "might" be the cause of this.
1. I don't get a push/pull as described while passing (that is totally normal especially with a crosswind). I get a choppy/loose feeling from the rear of the car when I am in the vicinity of the trucks (normally, with one on my side and one up front) - almost feels like the rear of the car is being lifted.
2. I would be curious to know if the people who don't have this problem have the rear spoiler. It would seem to me that that "might" be the cause of this.
Originally posted by doug_999
2. I would be curious to know if the people who don't have this problem have the rear spoiler. It would seem to me that that "might" be the cause of this.
2. I would be curious to know if the people who don't have this problem have the rear spoiler. It would seem to me that that "might" be the cause of this.
Lexus Champion
Joined: Jun 2001
Posts: 2,639
Likes: 2
From: California
Originally posted by EGainer
my es does the same if i pass a truck doing between 90 and 130. the physics says that faster air has less air pressure right.... well the truck has a large amount of low pressure, so as you are behind it and passing it, your car is being pushed toward the truck from the left. (assuming the truck is on the right). so you are trying to counter this by pulling left a little, then as soon as you pass the truck, there is regular air pressure there, so it pushes your car back stable again, but since you have been pulling left, your car might go left real quick til you get it straight again.... here's a quick pic
my es does the same if i pass a truck doing between 90 and 130. the physics says that faster air has less air pressure right.... well the truck has a large amount of low pressure, so as you are behind it and passing it, your car is being pushed toward the truck from the left. (assuming the truck is on the right). so you are trying to counter this by pulling left a little, then as soon as you pass the truck, there is regular air pressure there, so it pushes your car back stable again, but since you have been pulling left, your car might go left real quick til you get it straight again.... here's a quick pic
Moderator
Joined: Jan 2002
Posts: 1,835
Likes: 4
From: Florida
I have the factory spoiler
And haven't noticed what you're describing. I 'm assuming it's something that would be easily noticable {?), but I'll be mindful of it to see, the next time I'm on the highway. Cheers.
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MarcusMIA
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Aug 25, 2017 05:48 AM
