2020 SD bouncy when towing
Thread Starter
|
Cargo Master
Joined: Feb 2005
Posts: 2,898
Likes: 185
2020 SD bouncy when towing
I can't figure out why this 2020 is so bouncy when towing my 32' Reflection fiver. When I bought the truck I installed Sumo springs. I also put the Goosebox on the RV. Even if I air the Goosebox to near max when I hit a bump I get a really bouncy ride. I can't tell if it's the Goosebox, the Sumo "air spring" or if its the springs on the truck.
I do know that the springs on my 20 are softer than the springs on my 16 because the truck rides smoother empty.
Thoughts?
I do know that the springs on my 20 are softer than the springs on my 16 because the truck rides smoother empty.
Thoughts?
Hotshot
Joined: Oct 2015
Posts: 19,698
Likes: 12,822
From: Wyoming
Crappy shocks?
When I tow, I increase the setting on my Rancho 9000XL shocks to reduce the porpoising. That helps more than I thought it would. Mine is a bumper pull so not quite an apples-to-apples comparison.
When I tow, I increase the setting on my Rancho 9000XL shocks to reduce the porpoising. That helps more than I thought it would. Mine is a bumper pull so not quite an apples-to-apples comparison.
Thread Starter
|
Cargo Master
Joined: Feb 2005
Posts: 2,898
Likes: 185
Loaded pin weight of the camper is less than 2k lbs
Hotshot
Joined: Oct 2015
Posts: 19,698
Likes: 12,822
From: Wyoming
Maybe not enough pin weight? It depends on what your trailer's GVWR is and what the loaded axle weights are. If you have too much weight behind the axles I could see the trailer being bouncy.
Lead Driver
Joined: Jan 2002
Posts: 8,653
Likes: 4,737
From: Itinerant
Have you scaled the truck and trailer to see your pin weight?
Maybe the Sumos allowing to much bounce?
Maybe the Sumos allowing to much bounce?
Trending Topics
Cargo Master
Joined: Jan 2004
Posts: 2,424
Likes: 697
From: Minnesota
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Senior User
Joined: Aug 2012
Posts: 160
Likes: 14
Sounds like a pin weight issue, is your fresh water tank towards the front? We noticed that our rig tows quite happy with 2/3 or 3/4 water. Without that weight the rig tended to porpuse.
Are you towing without any water/black/gray tanks full?
Are you towing without any water/black/gray tanks full?
More Turbo
Joined: Aug 2005
Posts: 687
Likes: 215
I have Rancho 9000 adjustable shocks on my truck. When I tow I set them at their stiffest setting. I set them at half stiff when empty.
I have Air Lift air bags on the truck too.
I get too much bounce sometimes. But mostly when on bad roads: ==> roads that don't even provide a good ride when empty. The bounce is more pronounced when the roads have frost heave-like humps and dips.
I have found that with only 15 lbs of air in the bags the ride is better on wavy/humpy roads. On good roads I can air up to anywhere from 45 to 60 psi in the bags and things are OK.
I've pretty much decided that on bad roads it is a bad ride no matter when I do. On marginal roads I can vary the air pressure up or down to my liking.
I tried summa springs on the trailer but I don't think they helped.
I have Air Lift air bags on the truck too.
I get too much bounce sometimes. But mostly when on bad roads: ==> roads that don't even provide a good ride when empty. The bounce is more pronounced when the roads have frost heave-like humps and dips.
I have found that with only 15 lbs of air in the bags the ride is better on wavy/humpy roads. On good roads I can air up to anywhere from 45 to 60 psi in the bags and things are OK.
I've pretty much decided that on bad roads it is a bad ride no matter when I do. On marginal roads I can vary the air pressure up or down to my liking.
I tried summa springs on the trailer but I don't think they helped.
Hotshot
Joined: Oct 2015
Posts: 19,698
Likes: 12,822
From: Wyoming
I should have pointed out in my prior post that my trailer does have shocks. Not the lousy Lippert or Dexter shocks that it came with. I'm using Monroe Magnum shocks that provide a lot more resistance than the Lippert/Dexter shocks do. Will that solve the OP's problem? Probably not, but it has to help some.
FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
Does it also bounce on blacktop roads? Concrete roads and Ford SD's do not ride well together. Bet it's a long bed, right? Each concrete pad on the road sets up a rhythm with LB Fords. Soften your springs and it will reduce (but not eliminate) the bounce.
Cargo Master
Joined: Feb 2004
Posts: 2,068
Likes: 168
From: Central Texas
We need to talk because I have the same shocks, bumper pull, and my main complaint is porpoising.
Laughing Gas
Joined: Aug 2021
Posts: 908
Likes: 508
9 out of 10 times you will find your answer here.
Bob
Thread
Thread Starter
Forum
Replies
Last Post
17witha664x4
1973 - 1979 F-100 & Larger F-Series Trucks
6
Feb 3, 2012 03:22 PM