i've been hearing a noticeable, single clunk/pop sound in certain situations. it usually happens when i am easing into reverse, going from reverse to 1st, 1st to 2nd, or downshifting to 2nd and 1st. i started noticing it around the time i put my ProCharger piping in. initially, that's what i thought it was, a pipe smacking the frame somewhere in higher torque conditions but this is not the case. i can be cruising at 45 let off the gas, jab the gas, but get no sound. i was told to check my torque boxes. i found one broken, c-clamped it back in place and welded it but i'm still getting the sound. i thought maybe it's something with my clutch assembly but i would assume it'd happen anytime i used the clutch then, not just those particular situations. any ideas?