Ford F53 motorhomes with GVWR of 20,500-26,000 lbs have redesigned jounce bumpers that are designed to stay in constant contact with the suspension. This is normal and improves ride quality, not a sign of overloading.
Pivot bushing failure at 36,000 miles on your 2021 Ford E-350 is premature but not uncommon for RVs. The rear raise modification likely contributed to accelerated wear by altering suspension geometry.
Rear sway bar bushing replacement straightforward with basic tools. Consider polyurethane upgrade. Replace end links if worn while accessible.
Leaf springs rarely need replacement unless cracked, severely rusted, or visibly sagging. Your 30-year Arizona springs with no rust or sag are fine. Replace bushings as planned.
Steering wheel clunk and push-in play on 1995 F-53 is typically caused by worn steering column bearing, intermediate shaft U-joints, or floor bracket looseness. Check each component systematically.
The quick fix on Ford E-450 chassis involves the track bar, radius arms, and coil springs. On your Winnebago Outlook, look between the frame rails for the diagonal track bar. Take photos and post to owner forums for specific guidance on your setup.
ZF front suspension on Tiffin Breeze has known shock inadequacy. Koni upgrade from Tiffin helps significantly. If still bottoming, add Sumo Springs as progressive bump stops. Check for worn bushings, ball joints, and verify front axle is not overloaded.
Onan generator isolators available from Cummins dealers, RV parts suppliers, or industrial suppliers like Grainger. Measure bolt size and diameter to match if using generic mounts.
Replace missing F53 bump stop with Ford OEM or polyurethane aftermarket part. Consider helper spring upgrade for better performance. Check other side - they often fail together.
Bad F53 leaf spring shows as crack, sag, or broken leaf. Safety critical - replace immediately if cracked. Inspect spring eyes carefully.
Your symptoms point to a leak in the rear air bag system or cross-plumbing between tanks. The gurgling sound and faster rear sag indicate air transferring from front to rear tank through a compromised component.