Rear suddenly feeling unstable
#1
Rear suddenly feeling unstable
So I have an 08 with about 90,000miles and within the last week I have noticed whenever I exceed 120mph the rear end feels somewhat unstable. It feels as if the rear end is wondering or floating/sliding. I have never had this feeling in the rear end before and have taken the car up to a 168 with no such feelings.
When it started I was on stock suspension with the f-sport rear sway bar and figs racing control arms. I swapped the controlled arms back to stock and this did not fix the problem. I have had a set of RSR isport coilovers collecting dust for the longest time so I installed them and still the problem persists. There are no unusual sounds coming out of the rear or anywhere for that matter.
Anyone ever experience this? I am wondering if I have some fatigued bushings? Could this be something as simple as an alignment?
When it started I was on stock suspension with the f-sport rear sway bar and figs racing control arms. I swapped the controlled arms back to stock and this did not fix the problem. I have had a set of RSR isport coilovers collecting dust for the longest time so I installed them and still the problem persists. There are no unusual sounds coming out of the rear or anywhere for that matter.
Anyone ever experience this? I am wondering if I have some fatigued bushings? Could this be something as simple as an alignment?
#3
Racer
iTrader: (4)
Not sure what your alignment history is - but I would start there. Especially after swapping control arms and adding coil overs.
FWIW - when I replaced my tires (but before I got an alignment) my car became pretty squirrely at high speeds. The alignment eliminated the unstable-ness. What was odd was that while on the old tires, the car drove perfect,..once I swapped the new ones on the trouble started. I think the old tires had worn in such a way that the bad alignment was not obvious.
FWIW - when I replaced my tires (but before I got an alignment) my car became pretty squirrely at high speeds. The alignment eliminated the unstable-ness. What was odd was that while on the old tires, the car drove perfect,..once I swapped the new ones on the trouble started. I think the old tires had worn in such a way that the bad alignment was not obvious.
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#8
The Maker
iTrader: (11)
Mike
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Redefining Lexus Aftermarket Parts Since 2001
-- We are your Lexus suspension experts--
BCR - KW - PENSKE - OHLINS - HKS - GREDDY - STANCEPARTS
Links - Arms - SuperPro Poly Bushings - Solid Bearing Conversions - Motor Mounts
RB BBK's and 2P Rotors, G-Loc pads, Radium Fuel Systems
Custom Fabrication Design and Machining - Industrial 3D Printing - Laser Cutting
2018 USTCC Sportsman Class Champions - 2018 NASA ST5 National Champions
#10
The Maker
iTrader: (11)
Mike
__________________
Redefining Lexus Aftermarket Parts Since 2001
-- We are your Lexus suspension experts--
BCR - KW - PENSKE - OHLINS - HKS - GREDDY - STANCEPARTS
Links - Arms - SuperPro Poly Bushings - Solid Bearing Conversions - Motor Mounts
RB BBK's and 2P Rotors, G-Loc pads, Radium Fuel Systems
Custom Fabrication Design and Machining - Industrial 3D Printing - Laser Cutting
2018 USTCC Sportsman Class Champions - 2018 NASA ST5 National Champions
Redefining Lexus Aftermarket Parts Since 2001
-- We are your Lexus suspension experts--
BCR - KW - PENSKE - OHLINS - HKS - GREDDY - STANCEPARTS
Links - Arms - SuperPro Poly Bushings - Solid Bearing Conversions - Motor Mounts
RB BBK's and 2P Rotors, G-Loc pads, Radium Fuel Systems
Custom Fabrication Design and Machining - Industrial 3D Printing - Laser Cutting
2018 USTCC Sportsman Class Champions - 2018 NASA ST5 National Champions
#13
Got the car in for an alignment this past week and the toe was slightly out. I can't tell you how much because I cannot read German but the tech told me it wasn't much.
I got a chance to get the car up to 160 today and it felt planted or normal!
Thanks for the recommendations.
I got a chance to get the car up to 160 today and it felt planted or normal!
Thanks for the recommendations.
#15
Go straight to basics & check alignment/tyres before you start buying anything.
You can have all the fancy goodies in the world, but if your alignment is off & you have rear toe-out, there's no way you're going to feel confident.
You can have all the fancy goodies in the world, but if your alignment is off & you have rear toe-out, there's no way you're going to feel confident.