Why Your Sprinter RV Sways Side to Side (And How to Fix It)
Why Your Sprinter RV Sways Side to Side (And How to Fix It)
Why does your Sprinter RV sway side to side? Learn what causes this common handling issue and how a rear track bar can fix it for a safer, more stable drive.
Why Does Your Sprinter RV Sway Side to Side?
If your Sprinter RV feels like it’s swaying side to side while you’re driving, you’re not imagining it—and you’re definitely not alone.
This is one of the most common handling complaints we hear. Many drivers describe it as:
•Getting pushed around by wind
•Constantly correcting the wheel
•Feeling like the rear of the RV has a mind of its own
This issue is often called:
“Tail wagging the dog”
The good news?
Once you understand what’s causing it, there’s a clear way to fix it.
What does it mean when your RV sways side to side?
When your RV sways side to side, it usually means:
The rear of the vehicle is moving independently from the front
This creates:
•Steering corrections
•A loose or unstable feeling
•Reduced confidence behind the wheel
It can feel like:
•Driving a “sailboat”
•The back end is “pushing” the front
What causes a Sprinter RV to sway side to side?
The main cause is:
Side-to-side movement of the rear axle
As you drive:
•Side forces from cross winds, the bow wake of passing trucks, and/or steering inputs act on the chassis
•The coach body/chassis moves slightly relative to the rear axle
•You compensate by adding more steering inputs
This creates a cycle of:
Movement → correction → overcorrection
Why does the rear axle move at all?
It comes down to suspension design.
Most Sprinter RVs use:
•Leaf spring rear suspension
Leaf springs are strong and reliable—but they:
•Allow a small amount of side-to-side movement, both due to their own flex as well as the flex in the spring bushings and rear shackles
•Don’t fully lock the axle in place
That’s fine for a standard van…
But when you add:
A large RV body on top
That movement becomes much more noticeable
Why does sway feel worse in an RV?
Because everything is amplified.
Your RV has:
•More weight
•More height
•More surface area for wind
So even a small shift in the axle can feel like a big movement.
That’s why drivers often say:
•“It feels like I’m getting pushed around”
•“It drives like a sailboat”
How do you fix side-to-side sway in a Sprinter RV?
The most effective solution is:
•Connects the axle to the frame
•Keeps the axle centered
•Prevents side-to-side movement
How does a trac bar improve handling?
When a trac bar is installed:
•The rear axle stays centered
•Steering corrections are reduced
•The RV tracks straighter
•Stability improves immediately
It still allows:
•Normal up-and-down suspension movement
But eliminates:
The unwanted side-to-side motion
Will a trac bar make a noticeable difference?
Yes—and usually right away.
Most drivers notice:
•Less sway
•Better control
•Reduced driver fatigue
It’s one of the most noticeable upgrades you can make
Does this help with wind and passing trucks?
Absolutely.
When your RV is more stable:
•It reacts less to wind gusts
•Passing trucks have less effect
•You don’t have to fight the wheel
In some cases, it can even:
Reduce how often systems like crosswind assist need to activate
Is a trac bar the only upgrade you need?
It’s a big one—but it works best as part of a system.
For the best results, combine it with:
•Steering stabilizers
This creates a balanced suspension system that:
•Controls movement in all directions
•Improves overall ride quality
Why don’t Sprinter RVs come with trac bars?
Trac bars are typically used on:
•Coil spring and air ride suspension systems
Since Sprinters use leaf springs:
•They don’t include one from the factory
But once converted into an RV:
The added size and weight make this upgrade much more valuable
How do you know if your RV needs this upgrade?
You’ll likely notice:
•Side-to-side sway
•Constant steering correction
•Feeling pushed by wind
•Fatigue after driving
If that sounds familiar:
A trac bar is worth considering
Fix the Sway, Improve the Drive.
Side-to-side sway in a Sprinter RV is common—but it’s not something you have to live with.
By stabilizing the rear axle, you can:
•Improve control
•Reduce fatigue
•Drive with more confidence
Need Help Improving Your RV Handling?
If your RV doesn’t feel as stable as it should, getting a second opinion can make all the difference. Our team at SuperSteer and Henderson's Line-Up is here to help you sort through the details—because when it comes to RV handling, even small changes can have a big impact.
More stability. Less sway. Safer, more confident driving. Thank you for reading this blog and we wish you safer and happier driving!