Hi my name is Brandon, i drive a 2000 chevy blazer ls 2 door 4x4. recently i have heard a front end pop during sudden stops or when hitting the brakes and slight turns. It seems when the weight is suddenly dispersed it pops. it goes poppop. I have checked the the upper and lower ball joints, changed the sway bar end links, oiled all the grease zerks and even lithium sprayed everything. its so bad that i can feel it in the floor. I checked the torsion bar cross member and i can move it front to back and left to right. is that normal? if anyone has any ideas of what it could be, id appreciate it!

 

The other possibility is the upper control arm bushings are worn or the bolts are not tight and they are moving. The UCA bolts are used in doing the alignment, and they have some in-out movement when loosened off. Double check those too, and if they are loose then you'll need an alignment done.

 

how can i tell if they are loose? if i put a socket on it and tighten it will it fix it?

 

Just put a socket on one side, a wrench on the other side and see if the nut will tighten down. If it does then tighten it up solid and take it to get an alignment done. If the bolts are loose then your alignment will be out.