I have been chasing a knock in my 02 1500 4WD chevy front suspension for about 2 months now, and Im going to set the f'n thing on fire...

The noise (deep metal on metal sound) occurs at slow speeds, mostly when only one wheel hits a bump, and its stronger when turning.

I have replaced the idler arm and bracket, and both upper ball joints, all of which were smoked.

I still have the knock...can anyone point out things that they have found that do this.

I have not checked the lower ball joints, either of the control arm bushings, the pittman arm, or tie rod ends. I am not sure if the torsion bars have bushings, so I don't now if those are the culprits.

Can someone please put these items in order of probability to cause my problem...

control arm bushings
lower ball joints
torsion bar bushings
pittman arm
tie rod ends

Thanks, this is killing me.