Steering "steps" during left turn...

[The Chad]

1998 Legacy. My Wife hit a curb, now the steering feels like it pulses or more accurately makes quick "steps" to the right while turning right at low speeds. For instance, while turning right the steering wheel will take a little step, step, step, step while making the turn. To the left, it seems fine. At higher speeds while going into a right turn, I sometimes feel a rapid mechanical knock like something's loose. While going straight, the steering wheel pulses to the right slightly. Applying brakes doesn't seem to help.

 

So... could be a lot of things, but any tips for diagnosis? I'd already swapped the front right with the rear right wheel, it was a very slight help but it's still there. Already been to one shop and they weren't too good, so before I go to another I'd like to hear what you all think.

Edited February 23, 2012 by The Chad
Correct text

[WoodsWagon]

A screwed up outer CV joint could do that. Does it shake the wheel while you hold it in the same spot while turning or is it hard to turn the wheel, then easy, then hard again?

 

There's a pair of u-joints between the steering column where it pokes through the firewall into the engine bay and the steering rack. Soak them in a penetrating oil, not WD-40, and drive it for a bit. If it fixes the notchy steering for a bit, you need a new coupler.

 

If it doesn't change, you probably need a new rack. The curb impact may have chipped a tooth or something inside the rack.

 

Also check that the coil springs are turning smoothly with the strut as you turn the wheels from side to side. A seized strut cap bearing will make the spring wind up, then jump with a "bong" noise. That usually causes a steering pull to whichever direction you turned last though, not notchy steering.

Edited February 23, 2012 by WoodsWagon

[The Chad]

Thanks a lot, I'll check it out like you'd said. If all fails, it's off the the shop!