Originally Posted by newfieZJ
New control arm bushings in those stock arms would make a world of difference
Quoted for truth. I replaced front upper and lower arms altogether with OEM for $85.00 off eBay and it completely fixed the jerking steering wheel when hitting bumps. The bushings are too much of a pain so I just bought new arms.
Try removing the front drive shaft and see if the vibration smooths out? Could be out of balance or have bad joints.
Easier solution : When is the last time your wheels were balanced? I had a highway vibration that was caused by one of my wheel weights falling off at some point.
A steering stabilizer helps bump steer, but usually that's only the case if the current one is completely shot.
How are the conditions of all four of your ball joints?