Steve A Kuehnel
New Member
Towing a 4900 lb. travel trailer with 2013 Espy with HD tow package. I'm getting a lot of up and down movement with the Espy. I have an r3 campco recurve hitch.
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
It looks like that's a weight distribution hitch. We have a lot of up and down when we hit some bumps, but, we've weighted our trailer down in the back. I think 2/3 of weight should be towards hitch. We load a motorcycle on the back of our camper.Towing a 4900 lb. travel trailer with 2013 Espy with HD tow package. I'm getting a lot of up and down movement with the Espy. I have an r3 campco recurve hitch.
Towing a 4900 lb. travel trailer with 2013 Espy with HD tow package. I'm getting a lot of up and down movement with the Espy. I have an r3 campco recurve hitch.
Check your weight and balance. You need weight on the ball.
I've towed the same ~6000 pound travel trailer since 2005 with my Expeditions with none of these symptoms. First with a '07 and presently with a '17, both with HD towing. Equalizer (brand) WDH with 13%-15% on the ball as required for safe towing. Eastern mountains (nothing over 5000'). Run at highway speeds 65mph typically.
-- Chuck
My near perfect towing setup is:
2013 Limited with HD tow
Equalizer 12k WDH
LT truck tires (Falken Wildpeaks); aired up to almost 80psi when towing
Sumospring helpers on the back
Bilstein 4600s (front and back)
My Retro 265 probably weighs close to 6k loaded and I can get up to 70+ will minimal porpoising on bumps.
Also make sure your trailer load is balanced, probably biasing towards the front of the trailer axles.

Good. Didn’t really impact the ride much except to be less floaty.
If you still have sag with your hitch, you may need to add another washer or two. There shouldn’t be any sag, or at least the sag should be evenly distributed across all four wheels.
I can vouch for the bobbing. Had a 31' motorhome (Class C), and at the right speed on the right road (usually I-95 in SC or GA) it would literally be jumping hard enough to launch dishes out of the sink, or turn the rear bed into a trampoline. All I had to do was speed up or slow down by 2-3 MPH and it went away.A 4900 lb trailer causes bounce? Something isn't right. Two things come to mind.
1) Adjustment of the hitch. Might be worth it to pay a camper service center to take a look.
2) Trailer suspension issue or unbalanced tires. Trailer tires don't always come balanced. It's an ask.
3) Concrete resonance. Worn concrete roads can resonate bumps. All the sudden the trailer bops up and down. I first experienced that on a concrete highway. I pulled over and checked for a broken bar. I read about it later that some roads naturally amplify bumps and start bobbing the trailer up and down. As soon as I got back to asphalt, the ride smoothed out.
Good. Didn’t really impact the ride much except to be less floaty.
If you still have sag with your hitch, you may need to add another washer or two. There shouldn’t be any sag, or at least the sag should be evenly distributed across all four wheels.