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Jeff mine were replaced on the front prior to my ownership the prior owner was trying to fix the poor steering of the coach and replaced just about everything up front and in the rear. I have looked at the front and the drive axle and you're correct they do look to be the same although I haven't taken a caliper to it. They also replaced the panhard bar but finally gave up and the culprit was the bushings on the tag axle! The first thing that I noticed is there was a negative camber on the tag axle tires I had asked Richard and some other gurus if this was normal and it is not those bushings made a world of difference. Steve recently replaced his panhard bar but his bushings were good and it made a world of difference for him. Sorry to get off of your thread, I'm sure someone but more knowledge than me will chime in.

Thanks Jack, yea I have found a significant amount of play in the front drag link, cross shaft and tie rods. Took out a good 3/4"-1" of play, I could move the tire back and forth that much by hand. I think I am down to closer to 1/16 of play now. 
I have visually inspected the tag bushings and the panhard bar and I do not see anything out of place. I am going to get the tires put on this weekend and then hopefully get it out for a test drive and see how it does. If I am still not happy then I will investigate more on the tag and panhard bar. 
I just want to fix the sway bar bushings as they are worn out and I do not want to hear any banging or do any damage.