F53 Ford Chasis Suspension
Fred,
You didn't say what year, make, model, etc. From info gathered here and at other locations, it appears that '99 and later F53 chassis are experiencing ride and handling issues, and I've seen a lot of posts about how to minimize those problems. I have a '97 chassis, and can tell you it handles great (with a tag axle), and rides OK. I have weighed it and adjust tire pressures accordingly (it definitely does not need the max 80lbs).