Since day one I bought the car the car has had this problem. When driving only when the left front wheel goes over a pot hole the steering wheel breaks loose. The right front is fine. I have replaced the upper ball joints, lower ball joints, tie rods, and steering rack bushings. also when going really slow over a speed bump, the left front clicks(like a broken axle sound). i took it to lexus and they told me it was the lower ball joints before i had them replaced. please help..im taking it back there to se what else it would be..
my guess is the rack is worn...any sugestions?

 

try to turn ur wheel slowly to the left do u hear the sound? like turn it slow slow like wiggle it slowly and if u hear it crakling it could be ur rack is ur rack just turn the wheel around when and see if u could mimic the sound when my rack went it was somting like that

 

so sound..just got back from the dealer. rack is good..they said the left front struts are weaker then the rest...i guess i just have to save up and buy some coilovers and see if that fixes he problem.