I purchased a set of steeda uppers and granatelli weight jacker lowers. After I installed the control arms, I noticed a popping noise coming from the rear of the car. I talked to a couple friends about this and they said it was normal, but they solved their issue by welding the arms to the axle. I don’t really want to do this until I consult with you about it. Is there an easier way to solve this problem, and what causes it? Any information would be greatly appreciated.