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IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

car pulls all over road

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Old Dec 11, 2019 | 04:27 PM
  #16  
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i dont have any underbrace. im thinking about taking car to lexus to see if they can diagnose the issue but they want 149 to check it.
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Old Dec 11, 2019 | 04:53 PM
  #17  
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Originally Posted by SerigoR
i dont have any underbrace. im thinking about taking car to lexus to see if they can diagnose the issue but they want 149 to check it.

Take it back and have them Zero the REAR toe or maybe even toe it in 1/4 the amount it is toe'd out. Think in this way: if the leading edge of the rear tires are pointed away from each other, they want to climb out of the ruts. Being connected by the vehicle keeps them together but it also makes the rear want to step out and climb out of rut on the steeper side. This is a lot like torque steer where the driver compensates for the rear steering the vehicle off course while mashing on the throttle. The difference is you are cruising down the interstate and throttle change is not applicable. What I am not saying is tire pressure, worn tires, and looser suspension exaggerate an excessive toe out condition EVEN THOUGH it is within manufacturers spec. The devil is in the detail. What is the tire wear? Are the rears always wearing the inside a bit more?

An example of a toe out condition is feeling the car jog when one side looses traction like hitting gravel, ice, or even a metal expansion joint like on a bridge. Cars with unneeded toe out can be evil to drive on less than perfect highways.

Ideal Rear Toe: Zero with a Zero thrust angle
Toed in = Outer wear
Toed Out = Inner wear
Over inflation = center wear
Under inflation = outer edge wear

Ask questions... OK

Last edited by 2013FSport; Dec 11, 2019 at 04:57 PM.
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Old Dec 11, 2019 | 08:37 PM
  #18  
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Originally Posted by 2013FSport
Take it back and have them Zero the REAR toe or maybe even toe it in 1/4 the amount it is toe'd out. Think in this way: if the leading edge of the rear tires are pointed away from each other, they want to climb out of the ruts. Being connected by the vehicle keeps them together but it also makes the rear want to step out and climb out of rut on the steeper side. This is a lot like torque steer where the driver compensates for the rear steering the vehicle off course while mashing on the throttle. The difference is you are cruising down the interstate and throttle change is not applicable. What I am not saying is tire pressure, worn tires, and looser suspension exaggerate an excessive toe out condition EVEN THOUGH it is within manufacturers spec. The devil is in the detail. What is the tire wear? Are the rears always wearing the inside a bit more?

An example of a toe out condition is feeling the car jog when one side looses traction like hitting gravel, ice, or even a metal expansion joint like on a bridge. Cars with unneeded toe out can be evil to drive on less than perfect highways.

Ideal Rear Toe: Zero with a Zero thrust angle
Toed in = Outer wear
Toed Out = Inner wear
Over inflation = center wear
Under inflation = outer edge wear

Ask questions... OK
The rear is currently set with toe in according to the alignment sheet, (positive toe = toe in), this is correct for the rear.
The front is toed in as well this could be zeroed for best tire wear or a little toed out (negative toe) for best handling.
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Old Dec 11, 2019 | 08:54 PM
  #19  
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Originally Posted by mike33
The rear is currently set with toe in according to the alignment sheet, (positive toe = toe in), this is correct for the rear.
The front is toed in as well this could be zeroed for best tire wear or a little toed out (negative toe) for best handling.
lol - sheet has no contrast on this device! Couldn't see details. Regardless, too much either way makes a skittish vehicle!
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Old Dec 14, 2019 | 03:08 PM
  #20  
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im starting to think i have a stuck caliper because the right rear caliper gets hotter than the left.
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Old Dec 22, 2019 | 06:35 PM
  #21  
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Originally Posted by SerigoR
im starting to think i have a stuck caliper because the right rear caliper gets hotter than the left.
It's very unlikely this will impact its driving but obviously it should be fixed.

Recently replaced just the rears on the 350 RWD and when in the ruts it significantly reduced the cars needs to move about. Mind this is going from bald centers to new tires. I'm writing to say that the rear plays a huge impact in steering the car. Even the tire health. So keep that in mind.
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