End the "tail wagging the dog" sensation with this heavy-duty rear trac bar engineered specifically for the new 2021+ Ford E350/E450 7.3L V8 chassis. No more white-knuckle driving in crosswinds or when passing trucks.
Almost every Class B and Class C motorhome owner has experienced that uneasy feeling when the steering wheel is turned suddenly - a swinging motion that threatens your control over the vehicle. The SuperSteer SS451 Rear Trac Bar puts an end to that "Tail Wagging the Dog" sensation, greatly improving stability and driver confidence on the road.
This suspension stabilizer attaches at one end to your motorhome's frame and the other end to the rear axle, preventing unwanted side-to-side motion. By eliminating uncontrolled lateral shift of the rear axle, the SS451 dramatically reduces rear tail wag and sway that causes oversteering and constant correction. With your rear suspension stabilized, steering becomes more responsive, controlled, and predictable - transforming nerve-wracking highway driving into a confident, relaxed experience.
Stops the "tail wagging the dog" sensation by preventing unwanted side-to-side rear axle movement
Constructed from heavy-gauge steel with powder-coated finish for maximum strength and rust resistance
Bolts into existing OEM mounting points - no drilling required. Installs in approximately 1.5 hours
Backed by SuperSteer's Limited Lifetime Warranty for peace of mind on every journey
This SS451 trac bar ONLY fits the NEW 2021+ Ford E350/E450 V8 Chassis (7.3L engine). DOES NOT FIT: • Thor Quantum motorhomes • Thor Chateau motorhomes • Coaches with airbag suspension systems • Coaches with additional frame bracing • 2020 and older E350/E450 with V10 engine • 2021+ E350/E450 with V10 engine (uses different brake line routing) If you have a V10 engine or 2020 and older chassis, you need either the SS450 (if your RV has a factory rear sway bar with welded mounts) or the SS402 (if your RV does NOT have a factory rear sway bar). Note: Some Jayco coaches with Hellwig Overload Springs installed may require shifting the spring bracket rearward for proper clearance of the frame bracket.
Chassis model year may differ from RV model year. A 2022 model year motorhome may be built on a 2021 chassis. Always verify your actual chassis year and engine type before ordering. How to Verify: 1. Check the certification label on the driver's door jamb or inside the driver's door 2. Look for the chassis model year (not the RV model year) 3. Confirm you have a 7.3L V8 engine (not a V10) 4. Verify your chassis is E350 or E450 If you're uncertain about compatibility, check with your RV dealer or contact SuperSteer customer support at 888-898-3281 before ordering.
Complete Installation Kit Contains: • (1) SuperSteer SS451 Rear Trac Bar (Heavy-Gauge Steel) • (2) Polyurethane Bushings (Long-Lasting) • Frame Mounting Bracket • Axle Mounting Bracket • All Necessary Bolts and Hardware • Installation Instructions (PDF) • Warranty Documentation Everything you need for a complete installation - no additional parts or modifications required for standard applications. Just basic hand tools and approximately 1.5 hours of time.
Installation Steps (Detailed instructions included): 1. Safety First: Park on level surface, set parking brake, chock wheels, and support vehicle with jack stands 2. Mount Frame Bracket: Attach the trac bar frame bracket to existing OEM holes on the chassis frame 3. Mount Axle Bracket: Secure the axle bracket to factory mounting points on the rear axle 4. Install Bushings: Press polyurethane bushings into trac bar ends 5. Connect Trac Bar: Attach trac bar between frame and axle brackets using supplied hardware 6. Torque to Spec: Tighten all bolts to manufacturer specifications 7. Secure Brake Lines: Use zip ties to ensure brake lines are clear of the trac bar Professional installation recommended if you're not comfortable working under your vehicle. Most RV service centers can install in 1.5 hours.
SuperSteer manufactures three different rear trac bar models for Ford E-Series chassis. Use this table to identify which model fits your specific chassis configuration.
Many Class B and Class C motorhome owners accept poor handling as "normal" for their vehicle - but it doesn't have to be that way. The SuperSteer SS451 Rear Trac Bar is one of the most effective and affordable upgrades you can make to transform your driving experience. Common Problems This Solves: • Constant steering corrections to stay in your lane • Rear end swaying left and right when passing trucks • Feeling pushed around by crosswinds • White-knuckle driving on highways • Driver fatigue from constant corrective steering • Poor handling in emergency lane changes • Difficulty maintaining straight-line stability After installation, most owners report dramatically improved confidence, reduced driver fatigue, and a much more enjoyable driving experience. It's the difference between fighting your motorhome and truly enjoying your travels.
Download the SuperSteer SS451 Rear Trac Bar Installation Instructions
A: The easiest way is to look at the engine itself - V8 engines have 8 spark plugs arranged in two rows of 4, while V10 engines have 10 spark plugs in two rows of 5. You can also check your vehicle registration, owner's manual, or the certification label on the driver's door jamb which will list engine displacement. The 7.3L V8 was introduced in 2021 as Ford's replacement for the 6.8L V10 in E-Series chassis. If your chassis is 2021 or newer with a V8, this SS451 is correct. If you have any V10 engine (2021+ or older), you need either the SS450 or SS402 depending on whether you have a factory rear sway bar.
A: It depends on your actual chassis model year and engine type, not your RV model year. A 2022 model year Winnebago might be built on either a 2021 or 2022 chassis. Check the certification label on your driver's door jamb - it will show the chassis manufacture date and engine type. If the chassis is labeled as 2021 or newer AND has a 7.3L V8 engine, then yes, the SS451 will fit. The Travato is available on both E350 and E450 chassis with this engine, and the SS451 fits both. However, if your specific Travato has a V10 engine, you would need the SS450 or SS402 instead. Always verify your actual chassis year and engine type before ordering.
A: If you're comfortable working under your vehicle with basic hand tools, have jack stands and proper safety equipment, and can follow detailed instructions, this is a manageable DIY project. The trac bar bolts into existing factory mounting holes, so no drilling or welding is required. SuperSteer estimates approximately 1.5 hours for installation. The most important aspects are: properly supporting the vehicle with jack stands (never work under a vehicle supported only by a jack), ensuring you have clearance between the trac bar and brake lines (use zip ties to secure lines away from the bar), and torquing all bolts to the specifications in the instructions. If you're not experienced with suspension work or don't have proper equipment, professional installation at an RV service center is recommended for safety and warranty purposes.
A: Thor Quantum and Thor Chateau motorhomes can use the SS451 trac bar, but they require an alternate frame mounting bracket due to differences in frame construction and bracing. This is typically offered as an option when ordering from retailers who stock SuperSteer products. The alternate bracket accommodates the unique frame geometry of these models. Contact SuperSteer directly at 888-898-3281 to confirm which bracket option you need for your specific Thor model and year. Do not attempt to install the standard SS451 kit on a Thor Quantum or Chateau without the proper alternate bracket, as it will not fit correctly.
A: The improvement is typically dramatic and immediately noticeable. Most owners report that the trac bar completely eliminates the "tail wagging the dog" sensation they experienced before. Specifically, you'll notice: significantly reduced rear end sway when passing or being passed by large trucks, much better stability in crosswinds, far less need for constant steering corrections to maintain your lane position, more predictable and controlled handling in turns, improved confidence during emergency lane changes, and substantially reduced driver fatigue on long trips. One customer review on SuperSteer's website said it best: "Each pass of a semi would give me 1/4 mile of steering right-left-right... After adding this Track Bar, the snake-steering exercise became a thing of the past. My driving stints have honestly doubled!" The trac bar is one of the highest-impact, best-value upgrades you can make to your motorhome.
A: No, installing a rear trac bar should not void your warranty. The Magnuson-Moss Warranty Act protects consumers by stating that manufacturers cannot void your entire warranty just because you installed an aftermarket part - they can only deny claims if they can prove the aftermarket part directly caused the failure. The SuperSteer SS451 is a bolt-on suspension stabilizer that uses existing factory mounting points and does not modify the chassis in any permanent way. It's a suspension enhancement, not a modification. Many RV dealers actually recommend or install SuperSteer products themselves. That said, we always recommend keeping your installation receipts and having the installation performed by a qualified technician if you have any concerns. If your motorhome is still under warranty, you can also contact your dealer beforehand to discuss the installation - many will approve it without issue.