LS - 3rd Gen (2001-2006) Discussion topics related to the flagship Lexus LS430

steering wobble on bumps

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Old 04-29-13, 07:01 PM
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DSRxGOOMPA
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Default steering wobble on bumps

just recently lowered my 430 on coil overs about a month ago. yesterday i notice the steering wheel and front of car would wobble or shake pretty bad. anyone run into this kind of problem before? any help is greatly appreciated! thx!
Old 04-30-13, 02:16 AM
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kenshimoto
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just lowered my ls couple days ago on z40 also but didnt encounter the wobble or shake. first thing to do is alignment. and shaking while driving or braking, or at a stop? shaking while driving=unbalance wheels, defect tires or bent wheels or untorque wheels. shaking while braking=warp rotors/. shaking at a stop=motor or tranny mounts, misfire etc.
Old 04-30-13, 07:03 PM
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Originally Posted by kenshimoto
just lowered my ls couple days ago on z40 also but didnt encounter the wobble or shake. first thing to do is alignment. and shaking while driving or braking, or at a stop? shaking while driving=unbalance wheels, defect tires or bent wheels or untorque wheels. shaking while braking=warp rotors/. shaking at a stop=motor or tranny mounts, misfire etc.
just did alignment today and wobble/shaking is still there. my next thing to do it rotate the tire front to back and see if that does anything. it happens while drive and i hit a moderate size bump. it feels like that car is wobbling/shaking left and right
Old 04-30-13, 07:11 PM
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Kira X
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Maybe it's the steering rack bushings? The first generation SC's had that problem and it was usually the bushings.
Old 05-01-13, 08:37 AM
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Lynzoid
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Heavy wobbles are due to heavy imbalance. Suspension components will not produce these, unless something just torn off.
Alloys, centering of (have you got centering rings?), rubber...
Old 05-01-13, 09:41 AM
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LsBanGer43
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What wheels are you running?? you might need hub rings if your running after market wheels I don't have that issue after dropping the car.
Old 05-01-13, 01:54 PM
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kenshimoto
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steering wobble=steering wander rite? if so, a friend of mine had the same problem with his 01 UL after he drop it, he change the tie rods and it fix the problem. his inner is still good so he only change outer tie rods. also i would check all bolts are tighten and torque to spec if possible or hand tighten.
Old 05-01-13, 07:25 PM
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DSRxGOOMPA
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Originally Posted by Kira X
Maybe it's the steering rack bushings? The first generation SC's had that problem and it was usually the bushings.
thanks i will check that next
Old 05-01-13, 07:27 PM
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Originally Posted by Lynzoid
Heavy wobbles are due to heavy imbalance. Suspension components will not produce these, unless something just torn off.
Alloys, centering of (have you got centering rings?), rubber...

the wobble is when i go over a bump. car drives smooth, if the road is pretty flat
Old 05-01-13, 07:28 PM
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Originally Posted by LsBanGer43
What wheels are you running?? you might need hub rings if your running after market wheels I don't have that issue after dropping the car.
i am running my stock wheels
Old 05-01-13, 07:30 PM
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Originally Posted by kenshimoto
steering wobble=steering wander rite? if so, a friend of mine had the same problem with his 01 UL after he drop it, he change the tie rods and it fix the problem. his inner is still good so he only change outer tie rods. also i would check all bolts are tighten and torque to spec if possible or hand tighten.
thanks for the tip! i will also be checking all bushings and ball joints. ill let you guys know what i find thx!
Old 05-02-13, 11:13 PM
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Steering wheel column.
Old 05-03-13, 07:56 PM
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just inspected the front suspension today and found that both my front upper control arm ball joints have up and down play, which im assuming is causing the problem. going to switch it out and see if that fixes it...
Old 05-03-13, 09:45 PM
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Keep us updated.
Old 05-04-13, 03:06 AM
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usa5655
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hope u found the problems bro
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