GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

Not very stable at high speeds

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Old 10-20-10, 03:42 PM
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Shinobiend
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Default Not very stable at high speeds

It seems like the car likes to go in different directions on its own at high speeds sometimes following creases in the road. There is no play in the steering and there is no issue with alignment. What will make it more stable aside from a drop or strut bars? Its a bit less stable than my last car and maybe it just takes some time getting use to it.

Last edited by Shinobiend; 10-20-10 at 03:49 PM.
Old 10-20-10, 04:01 PM
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Chris98GS4
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I feel ya. I didnt like how this car was on the highway at all. Especially the creases in the road. But Ive gotten use to the ride now.
I put in Eibach springs with KYB along with a lot of other suspension work and it handles so much better.
I wish I could grab some Daizen bushing tho.
Old 10-20-10, 04:15 PM
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McKrevice
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You failed to list year and miles. You probably have a bad tie rod or worn bushings, or maybe your lug nuts aren't tight.
Old 10-20-10, 05:02 PM
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Oleg400
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I have the same issues and currently own a 99 gs400 160k miles. I have replaced the following, Lower BJs, upper ctrl arms with adjustable ctrl arms, new bilstein sp shocks, df210 springs, and currently awaiting TRD sway bars. My alignment is spot on atm, I’m thinking it is the sway bar bushings, I will update after the TRD sway bars installation.
Old 10-20-10, 05:34 PM
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raceforgt
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Originally Posted by Chris98GS4
I feel ya. I didnt like how this car was on the highway at all. Especially the creases in the road. But Ive gotten use to the ride now.
I put in Eibach springs with KYB along with a lot of other suspension work and it handles so much better.
I wish I could grab some Daizen bushing tho.
I just replaced my struts/springs with KYB/Eibach. Also did lower ball joints, tie rods, steering rack bushings and sway bushings. What all have you done on your GS Chris? What single thing would you say made the biggest difference?
Old 10-20-10, 07:38 PM
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Chris98GS4
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Springs/struts made the biggest diff. More stiff with a little drop.
I replaced both ball joints, tie rods, upper control arms, wheel hubs, sway links, sway bushings, bearings, I need to replace the caster arms and RR axle.

Also lots of alignments!!!!
Old 10-20-10, 07:45 PM
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here's a good read on tramlining (aka steering wheel following grooves and cracks on the road)

http://homepage.ntlworld.com/robert....tramlining.pdf

those of us with stretched tires would know about this
Old 10-20-10, 07:46 PM
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Shinobiend
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Originally Posted by McKrevice
You failed to list year and miles. You probably have a bad tie rod or worn bushings, or maybe your lug nuts aren't tight.
2000 GS400 with 40k miles
Old 10-20-10, 07:49 PM
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Chris98GS4
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Originally Posted by ElitistK
here's a good read on tramlining (aka steering wheel following grooves and cracks on the road)

http://homepage.ntlworld.com/robert....tramlining.pdf

those of us with stretched tires would know about this
Nice find! My prob did go away when I put bigger wheels with low pro tires too.
Old 10-20-10, 08:08 PM
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raceforgt
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Originally Posted by Chris98GS4
Springs/struts made the biggest diff. More stiff with a little drop.
I replaced both ball joints, tie rods, upper control arms, wheel hubs, sway links, sway bushings, bearings, I need to replace the caster arms and RR axle.

Also lots of alignments!!!!

Hmm I did a lot of the same things as you then. With the exception of the upper control arms. Those things are EXPENSIVE Are they worth replacing, especially since my car only has 75k?? That d@mn noise is still there though even after all the replaced parts.. very disappointed




Originally Posted by Chris98GS4
Nice find! My prob did go away when I got bigger wheels with low pro tires too.
That's funny I put on a set of 3GS 18s from my original 16s and I actually developed this problem! Although I think I know exactly why this happened.. the 18s are original stock off a 450h that came with runflats. Let me tell you if anyone has runflats, get rid of them! Biggest POSes ever invented. Unless your car absolutely can't carry a spare, do not even think about them. $350+ a piece and your car will drive like a tank along with every groove in the road steering the car!
Old 10-20-10, 08:16 PM
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Originally Posted by Chris98GS4
Nice find! My prob did go away when I put bigger wheels with low pro tires too.
it shouldn't but cool.
Old 10-21-10, 07:29 AM
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Shinobiend
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great info!
Old 10-21-10, 09:19 AM
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ThomasGS4
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Originally Posted by raceforgt
Hmm I did a lot of the same things as you then. With the exception of the upper control arms. Those things are EXPENSIVE Are they worth replacing, especially since my car only has 75k?? That d@mn noise is still there though even after all the replaced parts.. very disappointed
Can't say I've heard a UCA pop before. They definitely creak when turning into a driveway etc. My passenger side will need to be replaced eventually.
Old 10-21-10, 10:58 AM
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raceforgt
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I should say, the noise is MOSTLY a creak, some smaller pops in there but overall a loud creak. Here's something new I found just now doing a test run: when replicating the noise I found as Im pulling to the left and braking, the noise is coming from the right side of the car. As Im pulling to the right, it shifts to the front left side. Is this any help?
Old 11-22-10, 05:26 PM
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Shinobiend
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any other ideas?


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