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Discussion Starter #1 (Edited)
Hello everyone,,
I'm losing my freakin mind guys :crying: I replaced everything in the front end of my 2002 IS300 except wheel bearings, rack and pinion, and rims and now the vibration is worse than before. when I brake https://100001.onl/ https://1921681254.mx/ https://acc.onl/hotmail hard there is no vibration also when I torque it doesn't vibrate, it starts vibrating around 55 and increases with speed yet if I torque it from 55 to 100 it doesn't vibrate but as soon as I let off the gas pedal it starts to vibrate...
 

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If the vib comes in at a certain speed then gets worse with speed. It is something out of round. Like wheel, tire, or wheel bearings. You can check the wheel bearings yourself and the wheels with tires a tire shop can check.

If the vib comes in and goes away with more or less speed. Generally that is a balance issue.

Also is the car stock suspension and height?
 

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How does the tread on the tires look? As they wear, the inner edge wears quicker. You may have cupping on the tread surface. If it goes away with braking the suspension sounds tight. If you lift the front and spin the front wheels by hand, does it have a uniform sound or does it have a rubbing on off sound?
it took me 3 years to figure out my vibration was coming from a bent front right axle and bad master brake cylinder. Another issue thats not easy to diagnose is a clogged rubber brake hose. This stops the calipers from releasing.
 
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