brooksrimes Posted January 1, 2022 Report Share Posted January 1, 2022 We have a 2021 Jayco Greyhawk 29MV class C. Attached are links for a Hellwig 7180 rear sway bar, a Supersteer SS451 rear trac bar and rear Sumo springs SSR-130-54. Which would have the greatest benefit in reducing the push/pull from large tractor trailers passing us on the interstates? https://www.hellwigproducts.com/products/search-by-vehicle/?Year1=2021&Make=Ford&Model=E-450+Super+Duty https://supersteerparts.com/products/supersteer-ss451-rear-trac-bar-for-ford-e450-2021-v8.html https://supersteerparts.com/products/rear-sumosprings-solo-kit-for-ford-e350-e450-ssr-130-54.html Quote Link to comment Share on other sites More sharing options...
Bill Joyce Posted January 3, 2022 Report Share Posted January 3, 2022 From our experience upgrading a gas Class A, the sway bar would do the most for this issue. But our experience was from about 2002 with a Workhorse W22 chassis. Quote 2004 40' Newmar Dutch Star DP towing an AWD 2020 Ford Escape Hybrid, Fulltimer July 2003 to October 2018, Parttimer now. Travels through much of 2013 - http://www.sacnoth.com - Bill, Diane and Evita (the cat) Link to comment Share on other sites More sharing options...
Kirk W Posted January 3, 2022 Report Share Posted January 3, 2022 On 1/1/2022 at 4:21 PM, brooksrimes said: We have a 2021 Jayco Greyhawk 29MV class C. I believe that would be on the E450 chassis? With a 14500# GVWR I am wondering if you have weighed it yet and in particular know the weights of each side? An over load or off balance weight can cause problems in handling. Quote Good travelin !...............KirkFull-time 11+ years...... Now seasonal travelers.Kirk & Pam's Great RV Adventure Link to comment Share on other sites More sharing options...
TXiceman Posted January 3, 2022 Report Share Posted January 3, 2022 You cannot eliminate the push pull from a passing truck. And you will only get the maximum benefit from the rear anti-roll bar unless you also upgrade the front antiroll bar as well. The best improvements I got on m E-450 chassis was larger and heavier front and rear anti-roll bars with urethane bushings. I also changed to heavy duty Bilstein shocks on the front and rear. Once you get the suspension upgrades done, weight the RV and adjust tire pressures to match the load when it is fully loaded for normal travel. Also while loaded, get the front-end alignment checked by a truck alignment specialist (not a Ford shop). Ken Quote Amateur radio operator, 2023 Cougar 22MLS, 2022 F150 Lariat 4x4 Off Road, Sport trim <br />Travel with 1 miniature schnauzer, 1 standard schnauzer and one African Gray parrot Link to comment Share on other sites More sharing options...
sandsys Posted January 3, 2022 Report Share Posted January 3, 2022 For me, getting a 4-corner weight then balancing the load made a difference. I was in a conversion van with no passenger so I had to move tools and canned goods into the passenger seat area. I would never had considered that without the weighing at Rainbow's End. Linda Quote Blog: http://sandcastle.sandsys.org/ Former Rigs: Liesure Travel van, Winnebago View 24H, Winnebago Journey 34Y, Sportsmobile Sprinter conversion van Link to comment Share on other sites More sharing options...
LindaH Posted January 4, 2022 Report Share Posted January 4, 2022 23 hours ago, Kirk W said: I believe that would be on the E450 chassis? With a 14500# GVWR I am wondering if you have weighed it yet and in particular know the weights of each side? An over load or off balance weight can cause problems in handling. Also, getting a front-end alignment, if that hasn't already been done. I'd do these two things first before spending the money on additional equipment. Quote LindaH 2014 Winnebago Aspect 27K 2011 Kia Soul Link to comment Share on other sites More sharing options...
ARGO Posted January 4, 2022 Report Share Posted January 4, 2022 With some practice, steering a hair left as the front of the semi passes helps Quote You'd have to see the movie to understand.......... Link to comment Share on other sites More sharing options...
Lou Schneider Posted January 4, 2022 Report Share Posted January 4, 2022 (edited) You can't eliminate the push-pull, it's inherent in the long rear overhang on many RVs, especially Class Cs. As the bow wave from a passing truck passes by it hits the rear of the body first, causing to pivot around the rear axle and pushing the front of the RV towards the truck. Then it progresses forward, pushing the front end away from the truck - classic push-pull. I had a Damon Intruder 35' gas Class A that tracked like it was on rails. No special gimmicks needed - just a wheelbase that was about 15% longer than most RVs, with the accompanying reduction in the rear overhang. When hit by a side wind or passing truck it leaned smoothly and predictably away from the blast - no push-pull, back and forth movements. Edited January 4, 2022 by Lou Schneider Quote Link to comment Share on other sites More sharing options...
brooksrimes Posted January 5, 2022 Author Report Share Posted January 5, 2022 11 hours ago, LindaH said: Also, getting a front-end alignment, if that hasn't already been done. I'd do these two things first before spending the money on additional equipment. I've been thinking about an alignment. 🙂 Quote Link to comment Share on other sites More sharing options...
TXiceman Posted January 5, 2022 Report Share Posted January 5, 2022 13 hours ago, brooksrimes said: I've been thinking about an alignment. 🙂 As I have previously noted, for a proper alignment, load the RV as for normal travel and then go to a truck alignment shop. The typical Ford shop does not know how to properly align the E450 chassis. Ken Quote Amateur radio operator, 2023 Cougar 22MLS, 2022 F150 Lariat 4x4 Off Road, Sport trim <br />Travel with 1 miniature schnauzer, 1 standard schnauzer and one African Gray parrot Link to comment Share on other sites More sharing options...
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