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Car moves side to side at 120+

taccone805

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Car has a almost wobble to it above 120 I have the performance pack 1.5 drop in the rear 1.25 in the front tires in rear 285/4019 frOnts 255/40r19 it’s almost like something is fighting the tires
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BmacIL

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What's your alignment settings?
 

moffetts

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Like bmac said, confirm your alignment is good and also check that your hubs/bearings are nice and tight. I have experienced that weird shimmying and it was a combination of both.
 

ronemca

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Verify tire pressure and hub-wheel interface (plus lug nut torque) on all four corners as well.
 

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BmacIL

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I’ll have it checked and get back to you thanks
OK. As you mod and as you take a car to the performance envelope, factory alignment "green" windows are no longer good enough. Things must be very close, particularly with toe left and right, like 0.01 deg off, 0.02 tops.
 

ronemca

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Another possibility that would directly explain the original complaint is excessive alcohol levels in the organic control system.

Just sayin'.
 

F1scamp

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Check your rear axle nut torque. Sounds weird, but mine developed and similar side to side wobble at higher speed and acceleration. One of the axle nuts had loosened a couple turns. Tightened it up and it went away.
 

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Another possibility that would directly explain the original complaint is excessive alcohol levels in the organic control system.

Just sayin'.
:lol:


OP, I suggest checking your alignment and tire pressures first. Too low of pressures, and the ensuing sidewall flex, might cause your problem at those high speeds. If you did not get an alignment following your spring install, or had an alignment improperly done, this will surely cause issues.
 

aleccolin

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Lowering without alignment usually means toe-out which is great for low speed cornering (autocross) but crap for high speed stability.
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