('07 Cobalt; 50K miles; NO ABS, no traction control, no limited slip)
First winter storm for this car. When accelerating or braking on poorly-plowed road (so, slush/ice/some pavement), I got a disturbing rapid clanging/knocking, probably from the left front. I've driven a lot of front-wheel drives in winter, and never run into this. No bad sounds on dry pavement.
Curious fact: later, in deeper slush/snow, one wheel was spinning. There was no such clanging then. I think this might imply that the problem is just on one side; or, maybe the noise only occurs with 'slip/grab' conditions, not when spinning free.
The front suspension stuff looks OK. The CV boots aren't ripped. I get about 8 degrees of free movement/lash when I rotate the wheel by hand. (ie, when I rotate the wheel, and then reverse the rotation, there's that much play before I feel significant resistance.)
Any thoughts on what it might be? Or anything I could check while the front end is up? (Everything is plowed now, so no road tests for a while.)
UPDATE: for the record, shortly after the above, the car exhibited steering problems. Since changing the rack & intermediate steering shaft, both the steering problems and the clanging have ceased.