Hold your horses everybody hahah. I have that popping noise and its the coil spring. on hill climbs mine pops and it feel like someone is taking a hammer to my wheel well.well i tried to make it up the hill last nite and it did fine just poped a few times but climbed fine once i got a little bit of a run and go it went up it sounds like the drive shaft popin to me but i may be wrong i have at tires on it that fill up quick with the snow thats why it wouldnt climb the hill before once they was cleared it went up pretty easy just poped some so i really don't know what it is