I just bought a used 2004 Winnebago Sightseer 30B workhorse chassis. As I drove it on the highway I struggled to keep it in one lane. I've read so much I'm now confused. The last advise was to replace...
Prior to Sept 2003 the W chassis had a 2" rectangular anti sway bar. After Sept 2003, they went to a 2.5" anti sway bar. Depending on the manufacturing date of the chassis on the OP's 2004 coach, it could have either the 2" or 2.5" anti sway bar.