getting axle knock please help!!
 

so i took my car to the nurburgring gp track yesterday. after getting off the track i noticed a noise in my drive train. when the car is sitting still and you rock the steering wheel back and forth you can hear a knocking noise and feel it a little in the steering wheel. i got under the car on both sides and started grabbing stuff and shaking it. on the passenger side when i moved the axle back and forth it moved about 1/4 inch or so and made the same noise i heard from inside. it is coming from the wheel side of the axle. i am guessing that it is starting to spread apart but not all the way broken yet. i should just need new axles right?

if i just need new axles, what does everyone think about zzp's and ottp's stage 1 axles? they are the same price. are they identical?

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