Rancho 9000's might have been an oops
I installed Rancho 9000's on our Dodge 3500 about 12,000 miles ago. 4000 miles hauling our single slide 9ft camper / towing, 3000 other miles towing cargo/flatbeds, and about 800 miles towing our Car...
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I tried Rancho 9000s on my Dodge Cummins. After having two metering valves fail (replaced under warranty) I sold them on eBay and bought Bilsteins. My opinion, Ranchos cannot handle heavy loads off road.
