i've been having this really weird feeling in the steering wheel when i start a turn, it feels like the wheel shakes a bit and is hesitant to turn in. i'm thinking the problem could be caused by me changing my front tires (from the stock contis to BF goodrich drag radials) every weekend. i checked my wheel bolts, and they don't show any sign of abuse. i always use a torque wrench and torque the lug nuts to around 90 lbs-ft. i also have like 20k miles on my spec, so could it be time for some new power steering fluid or something? or do i need an alignment?