I need some expert thoughts on this. For the first time since doing many mods I have taken my car out to run it. And it is definitely faster....however I have a delima. Since I am now getting really good traction I have noticed a loud pop coming from the rear end, (as if something is slamming into the floorboard) when I nail second. A friend of mine rode in the car and said he thought the pinion snubber was coming up and slamming into the floorboard. Does this sound right? I am installing the Granatelli upper and lower control arms tomorrow. I am hoping this will help. Let me know what you think before I go tearing into the rear suspension.