Sharp Bouncing

jeffreyduncan wrote:

I have a 2015 Chevy 3500 HD short bed, Crew with the duramax. It's setup with RS9000's in the rear (set at 9) and stable loads. Front shocks are Bilstein 5100. I have a Hellwig stabilizer in the rear. Truck is stock otherwise. No airbags.

I have a fairly heavy camper and took this setup out over the weekend for my first road trip. Everything went very well and I am generally pleased with the way it handles. However - I notice that I get an annoying fast bounce (I think from the rear). It's not a porpoise. It's more of a chucking. It happens a couple times per second it seems, when I am rolling over small bumps at highway speeds or over 40mph. It's not constant, and any larger bumps or dips are handled fine. It's more of an annoyance than a drivability issue.

You might consider the possibility that the rear shocks are contributing to the ride issue. I've had a similar issue with "defective" Ranchos in the past (Rancho claimed it was impossible, but changing to Bilsteins solved the issue, not to mention that I was weary of seeing oil dripping down my new Ranchos every time I walked out to the truck). I went straight to the Bilsteins for this truck. Tons of happy Rancho 9000 owners out there might have some insight.