The car had coil springs with air shocks in the rear that would pump up to maintain ride height. And all I have done so far is replace the rear air shocks with a conversion kit which keeps the ride height, and They seam to start squeaking before the upper mount finally fails. This is just like what I installed. http://www.strutmasters.com/Park-Avenue-Rear-Air-Suspension-Conversion-Kit-p/-cad-r5ns-bp.htm
The car had coil springs with air shocks in the rear that would pump up to maintain ride height. And all I have done so far is replace the rear air shocks with a conversion kit which keeps the ride height, and They seam to start squeaking before the upper mount finally fails. This is just like what I installed. http://www.strutmasters.com/Park-Avenue-Rear-Air-Suspension-Conversion-Kit-p/-cad-r5ns-bp.htm