Ok...this may be off target per this discussion, but our 24R had a lot of chassis creaking and at least one time, the front track of the slide did not retract all the way. I also noticed a lot of upper chassis sway and bounce while driving down the road. The 24R uses the Daimler 3500 chassis, and I noticed that there was at least 6" between the axle and the upper bumper. I have used Timbren axle bumpers before, which bring the upper chassis down to contact the axle, providing a large amount of reduction in sway and independent movement from the axle. After installing a set, I was amazed at the improved cornering, and a strong sense that the axle and the upper chassis were moving in concert. Most notably, though, and in reference to your problem, the amount of creaking of fiberglass flexing was almost completely eliminated. I would consider it a major handling/driving improvement.