Traction Bars?
 

I am trying to figure out if it is time to get some traction bars for my 2002 excursion. I have the 7.3 and am having some serious steering issuses. I have tweaked my steering box and it helped. Yet, when driving i feel like i am bouncing off the lines. I have 109,000 miles with new tires. Could new shocks help or is it a traction bar fix due to rear axle wrap? Any help would be appreciated. Thanks.