It could be the steering intermediate shaft. Take it to the dealership to get a proper diagnosis of the problem.
No, TRD is a Toyota approved part and does not void warranty or has any negative effect they can blame. I even had them installed at the dealer. Let a professional take a look and insist on the test drive to demonstrate the issue you are experiencing.I dont think its torn because it drives perfectly if I'm going over 10 mph...but if i take it to the dealer wouldn't they blame it on the TRD springs?
I have the same noise. So I will have my guys double check and then order the parts.I took my car in for an oil change and asked them if they could take a look at the noise...turns out to be that the Steer shaft is messed up. They have to replace it. They ordered the part so I should be taking it in next week to have it replaced.