RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty
Item # RAS3611-SHD
Our Price: $589.00
Confirmed to Fit
2019 Ford F-250 Super Duty
2 Wheel Drive
4 Wheel Drive
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2019 Ford F-250 Super Duty - RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty
- Leaf Springs
- Rear Axle Suspension Enhancement
- Heavy Duty
- RAS
3,000-lb Capacity. Convert your Ford F-250 Super Duty's leaf springs into a mechanically active suspension system. RAS adjusts to your load to level your ride. The system also increases stability, handling, and control by improving traction and reducing sway.
Features:
- Heavy-duty custom kit converts your vehicle's factory leaf springs into a mechanically active suspension system
- Actively strengthens leaf springs for improved ride quality with or without a load
- All-in-one suspension system improves stability, handling, and control
- Eliminates axle wrap, wheel hop, and bottoming out
- Reduces dangerous sway and body roll while cornering
- Keeps your ride level when towing or hauling a heavy load
- Improves traction while breaking and accelerating
- Variable-rated coil tension springs automatically adjust to your vehicle's load
- Activate immediately to support the extra weight
- Disengage when unloaded, allowing your leaf springs to perform as intended
- Customizable coil springs can be adjusted during installation to accommodate your towing or hauling needs
- Independently adjustable for side-to-side leveling of off-center loads
- Helps extend the life of leaf springs, shock absorbers, shackles, and even tires
- Durable, epoxy e-coated steel construction
- Corrosion-resistant brackets on the ends of each unit have a salt spray rating of more than 800 hours
- Easy, bolt-on installation - no drilling, cutting, or welding required
- Unit secures under the leaf spring and around the factory U-bolts
- Fully assembled kit and hardware are included
- Maintenance-free - adjustments and monitoring aren't needed once installed
- Made in the USA
Specs:
- Weight capacity: 3,000 lbs
- RoadActive Suspension will not increase your vehicle's weight-carrying capacity
- 5-Year warranty
- 30-Day money-back guarantee
All-In-One Suspension System
When towing or hauling a heavy load, you may encounter a number of problems that can make your driving experience difficult or dangerous, such as sway, body roll, or bottoming out. When your vehicle is weighted down, your factory leaf springs can't counteract these problems to the extent that they are supposed to. The weight will overpower the leaf springs and cause them to twist or flatten out. When that happens, they cannot support, level, or stabilize your vehicle effectively. Additionally, because your factory leaf springs are passive, they won't begin to tackle problems such as sway until those problems have already started.
RoadActive Suspension (RAS) kits enhance those passive leaf springs by converting them into a mechanically active, all-in-one suspension system. RAS kits have variable-rated coil tension springs that automatically adjust to your heavy load. Other suspension systems only solve a few problems and usually at the expense of other improvements your factory leaf springs may need. RAS, on the other hand, is a unique kit that provides everything you want in a suspension system without any trade-offs. It eliminates bottoming out like air springs, reduces sway and body roll like sway bars, keeps your ride level like helper springs, and improves traction and braking control like traction bars. This improves your vehicle's stability, handling, and control while you are towing or hauling, as well as when your vehicle is unloaded. RAS also makes your overall driving and towing experience safer and more comfortable, which greatly lessens driver fatigue.
How RAS Works
Each RAS unit has a powerful variable-rated coil tension spring that converts your passive leaf spring into a mechanically-active system. Once your vehicle is loaded, the tension springs immediately activate to absorb and support the weight. This allows your leaf springs to maintain their bowed position and keeps them from flattening out or flipping over, which greatly hinders their ability to bear a heavy load. The tension springs are variable-rated, which means that the heavier your load is, the more assistance they provide to your leaf springs. Because of this design, RAS reacts instantaneously, whereas hydraulics, air springs, and other suspension systems take time to react. And unlike your factory leaf springs, RAS stops sway and sag before they even start to happen. Additionally, when your vehicle is unloaded, the tension springs disengage, allowing your leaf springs to perform as intended without hardening your ride. RAS won't hinder your leaf springs' movement, nor will it cause any friction between any of the brackets.
Eliminates Axle Wrap and Wheel Hop
When under a heavy load, leaf springs are especially susceptible to axle wrap, which can cause wheel hop. Wheel hop is when the tires lose their grip on the road, causing a jarring, up-and-down movement. Axle wrap occurs when the circular motion of the tires cause the leaf springs to twist or rotate. If the leaf springs twist far enough, wheel hop can occur. RAS stabilizes your leaf springs by absorbing the force of the load they're trying to support. This eliminates axle wrap and wheel hop, as well as prevents your vehicle from bottoming out. Because of this, less strain is put on your vehicle. And by reducing some of this wear and tear, RAS helps extend the life of your leaf springs, shock absorbers, shackles, and even tires.
Reduces Sway and Body Roll
When driving along a curve while towing or hauling a heavy load, the back end of your vehicle or trailer can start to shift with that weight. If your factory leaf springs have flattened or twisted under this load, they won't be able to prevent it from shifting. Because of this, your trailer will sway away from your vehicle. This makes driving challenging and dangerous, as it increases the risk of body roll, which is when your vehicle drastically leans to one side. This can often cause you to completely lose control of your vehicle. Body roll is especially prevalent with multi-passenger vans and vehicles towing long campers, trailers, or boats. RAS provides a much safer ride by reinforcing your factory leaf springs and stabilizing your load. This helps prevent sway from occurring and reduces the chance of body roll while cornering, turning, and swerving. RAS also lessens the rocking motion that happens during windy conditions or when a semi passes by on the road.
Levels Your Ride and Improves Traction
When your vehicle is overloaded, the bulk of the weight transfers to the rear axle. Your factory leaf springs then become overwhelmed by this weight, as they are not strong enough to support it. This causes the back end of your vehicle to sag and the front end to rise, which means that the front tires have lost some of the grip they need with the road. In addition to loss of traction, it can also cause poor headlight aim, unintentional swerving, and an extremely bumpy and uncomfortable ride. RAS bolsters your factory leaf springs and enables them to provide support for your load without compromising ride quality or comfort. This keeps your ride level from front to back whether you are hauling a load in the bed or towing a boat, trailer, or camper. RAS also ensures that your tires have the traction they require while braking and accelerating, which improves the overall driving experience.
Customizable Coil Tension Springs
RAS is also customizable. During installation, the coil tension springs can be adjusted to 2 different tension settings or anywhere in between for improved road handling and support. To do this, rotate the springs while keeping the threaded rod still. As you turn the spring, use one of the 2 included spacers as a gauge to measure the widening gaps between the coils. In order for the RAS units to work as intended, you must tension the coils to a minimum of 25 percent with the 1mm white spacer and no more than 40 percent with the 2mm spacer. The springs can also be independently adjusted to compensate for off-center loads such as a handicap lift.
Easy, Bolt-On Installation
This custom-fit kit comes fully assembled and is easy to install. Each RAS unit simply bolts onto your factory leaf spring with the included hardware, and drilling, welding, and cutting aren't required. First, position the eye hook bracket so that it wraps around the top of the factory leaf spring eye. Then the axle bracket secures under the leaf spring and around the factory U-bolts on the other side of the leaf spring pack. Once the maintenance-free RAS units are fully installed, you won't need to monitor them as you would with air springs.
Corrosion-Resistant Steel Construction
RAS is extremely durable and corrosion-resistant. The units are constructed of high-grade alloy steel, and they have an epoxy e-coat on the coil springs to provide extreme corrosion resistance. The brackets on the ends of each unit resist the effects of water and other elements, and they have a salt spray rating of more than 800 hours.
3611-SHD RAS Custom HD Active Suspension System for OEM Leaf Springs - Rear Axle
3611S-HD
Installation Details
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
- Wrong item was ordered
- etrailer mistake
Customer Reviews
RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty - RAS3611-SHD
Average Customer Rating: 4.7 out of 5 stars (726 Customer Reviews)
3,000-lb Capacity. Convert your vehicle's leaf springs into a mechanically active suspension system. RAS adjusts to your load to level your ride. The system also increases stability, handling, and control by improving traction and reducing sway.by: Omar12/06/2023
I didn’t notice any significant change.
by: Neil 03/18/2021
Nissan Leaf
Purchased the Roadmaster Active Suspension Leaf Spring to level my 5th wheel and truck bed while under load. Based on our typical annual mileage pulling the trailer I did not want to spend the additional money to install air bags. After several trips pulling the 5er we experienced a much smoother ride and better handling expecially in the mountains. I am very pleased with my purchase.
by: Wayne10/12/2021
I tried to like it but just couldn’t. It didn’t help the suspension at all. I had it professionally installed and adjusted 3 times to no avail. It honestly didn’t change anything in the trucks stock suspension. I took it off and got air bags and am much happier. That was a lot of money to spend to not help my trucks suspension. I tried selling them but can’t. Word must be out how bad these are.
by: James 08/04/2020
5 stars is based solely on the extremely fast shipping. I looked at purchasing these from the manufacturer, however after seeing they had a 3 week wait time I I logged onto Etrailer and learned they were in stock for immediate shipping. Every thing that I have orders from Etrailer has shipped fast. I will continue to use Etrailer as my go to source for camper needs.
James
8/5/2021
I originally put shaded this for towing a travel trailer and it worked great. I have since upgraded to a 5th wheel and the system is still impressive. Highly recommend the purchase
by: William 01/13/2023
Received in timely manner install was less then 1/2 hour , and hauling camper and trailer did improve
by: Jeffrey 05/23/2023
haven’t towed with them yet but when i do i’ll come back here
by: Lester08/28/2021
The installation was going to be difficult so I didn’t install. They are still sitting in my garage.
by: Steve 10/11/2022
2018 FordF-250 Super Duty
Very easy to install and what a difference it made. No drop when hooking up my 11,000 pound camper anymore meaning better driving
by: Robert02/09/2022
Ford
Installed about a year ago. Wish I had installed them on every truck I had ever owed! Improved overall ride both empty and loaded. No more squat. 2016 Ford SuperDuty
by: Patrick 05/09/2024
2021 FordF-250 Super Duty
by: Timothy 02/24/2021
by: Russell09/01/2022
I received this kit in a very timely manner always do from etrailer have some issues with the instructions that come from roadmaster not a trailer the bump stop spacer didn’t say that you need to use the original bolt from the bump stop so it slowed me down greatly on the install however I took it out on a quick run without a load I do feel that this has made the unloaded ride smoother tomorrow I’ll be taking the trailer out for a bit and we’ll see how it works there and I’ll update this rating.
by: Keith08/26/2022
Admitedly, I haven't even rolled my '07 Silverado 2500HD classic out of the garage yet, but I'm already very pleased. I had to go to a neighbor for a 10mm hex key socket and was slowed down by my 7yo kid 'helping', but it was still only 90 minutes my jack stands were in use. Easiest thing to do!
My only small downsides so far:
* needed to find a 10mm hex key that I apparently don't own, not sure why they picked that fastener
* wish I put some loc-tite on; just to make me feel better
* distance to drop the axle so the suspension fully hangs was way further than I expected; barely had my jack stands tall enough to get the job done.
These aren't really bad on the product, just notes for future customers. We're towing the 5er about an hour an a half this coming week, hopefully it steadies up a lot!
by: Michael06/21/2022
Overall, very happy with the product. GMC didn't have any way to improve the truck from squatting when I hooked up my trailer. This kit didn't stop the squatting but significantly reduced the bounce on bad dips in roads, bridge/road transitions and bad railroad crossings.
by: Trebonz04/11/2024
Sure beats air bags or blocks! My Gmc canyon diesel is a great puller, needed help with suspension hauling load limit. Easy to install and works great. On high setting it raised the truck rear an inch or two even empty but the way gmc set up the suspension I consider it a good thing.With my tandem axle 16' trailer loaded it's a saving grace.
by: Julien04/16/2023
I bought this last summer (2022) for my 2020 F150 to haul the travel trailer (summer) and to have the quad in the box (fall) during the hunting season. I mainly used it during the weekends as I work from home during the weekdays. I adjusted the tension just before the winter because I haven't haul anything during winter. As it is now spring, I wanted to adjust back the tension for the rv season and I found everything rusted out (I am.in Canada and use the truck only 2-3 times a week).
I was pleased to use the product back last summer but because of all the rust I found this spring, I'm having a hard time adjusting them and I am also quite scared for next seasons as rust is making adjustments hard.
By having this for less than a year, I am now dissapointed in the product. Before buying this, I looked a lot into airlift a lot but because of reviews, I changed my mind to go with RAS.
Rust is now found on the main threaded rod locking nuts the bolt/tube underneat locking the device was rusted and seized.
by: Eric S07/30/2023
Rarely adding an aftermarket "upgrade" to any of my vehicles am I 100% satisfied with the outcome. There is usually a trade off with something. However, this is one of those upgrades that has zero con's that I've discovered so far. I was struggling to keep the leaf springs on my modded out 3rd get Tacoma from "flattening" out because I always have at least 900 lbs of payload in my bed. Adding the RAS has prevented this from happening. I also thought that they would affect off road performance, since I've never seen them in an off road application before, they don't. People on the trail often ask "What the heck?" when they see them on my rig. I tell them that RAS is the easiest to install, most cost effective solution to manage sag without sacrificing ride quality. There is the famously noted "Taco lean" and it's most prominent after fueling up. RAS will help iron this out. I've had them on for about a year now and they haven't needed any adjustments. Kinda like (Ronco), "set and forget it". I don't know their duty cycle is but, I wouldn't hesitate buying them again!
by: Rodrigo 05/16/2024
Great product, holds like new after a year of TOTAL abuse. Did brake at the double nut end after a big snow in Colorado (that I didn't enjoy carefully) and the thing came of. Was lucky to find the parts once the snow melted in my street.New nuts and more than enough bolt left to reinstall. Do the job and more. I load my Ram 1500 a little more than I should because of it, and with the friendship of a pair of Timbren from etrailer, your engine is your main limitation.
by: Jim01/08/2024
Installed this today on my 2023 Ford F150 Lariat 4x4 with the tow package. The kit arrived within 2 days of ordering. The box was slightly open but the springs appeared undamaged. I elected to do the install myself and opted to get a 4 ton floor jack to replace my very old 3 ton. I’m very glad I did. After blocking the front tires and setting the parking brake, I loosened the wheels and raised the rear at the differential using a small 2x4 block to span the contact points. I took the wheels off and originally set my jack stands in front of the leaf spring on the frame. Lowering the truck onto the stands was not effective. There wasn’t enough travel to provide relief to the springs. I ended up setting my jack stands on some 1x16 scrap pieces and put them under the spring attachment point. This gave me just enough room on my floor jack to unburden the springs. Once I got over this small hurdle the install went smoothly. This took about an hour to very carefully construct as I didn’t want to drop my brand new truck on the ground. Brand new 5 ton jack stands would have eased my mind considerably. My install includes a spacer for the bump stop to offset it towards the centerline of the vehicle. The instructions weren’t intuitive and it took a few minutes to figure out the bolts. You need to insert the provided bolt into the spacer and attach the spacer to the frame with the original bump stop bolt. It’s the only one you can get a socket on in the depression. The bump stop then attaches to the provided bolt you inserted into the spacer using the provided nut. You will need a deep well 15mm socket for this attachment. Fortunately I had one. I set the spring using the 25% white spacer, reinstalled the wheels and set the truck back on the deck. The truck now sits 3/4” higher in the rear. I drove around and noticed that I was sitting a little higher as the site picture changed a bit. The truck didn’t seem to ride differently empty. If anything it seemed a little more cushioned though no less responsive. I towed my 9000lb travel trailer previously with a Ram 2500 6.7l diesel that had Sumo springs and a WD hitch. I got tired of the cost and maintenance and selected this Ford because it could haul the trailer. I chose the RAS over the Sumo springs because of how much squat I observed when I hooked up the trailer initially. I will update after I tow the trailer. My only concern at the moment is that the bump stop spacer isn’t going to provide enough clearance from the bracket.
by: Miguel07/09/2021
I love the product since i have a 2021 toyota tacoma crew cab long bed with a campertop a robber mat and a jack thats around 450 pounds that a have at all times my truck was sittind low a lilbit plus it was swagging on the road i have summo spring to help my suspention but it was not enoght so i did my research but this was my better option i just installed it yerterday july-8-2021 and went for a ride where i ussually drive everyday and WOW now my truck rides very smood plus it lift my tryck 1 inch on the back now my tryck seats level it took me about 2 hrs but i did right i just follow the intructions and done i love the product the only thing that im concern is that the left side underneat the springleaft there is a breik line that is too close to the roadmaster suspention i hope that with the time dont hit that line because if it does thats the line for the breiks and i will be in trouble replacing it other wise evreything works great i recomend it 100% thanks guys i will buy it again?????best $500 that i spend on my truck
by: Steve01/08/2024
Love this product. I ordered a set for myself just before Christmas and I was so impressed that I ordered another set for my son’s truck. I was kind of worried that it would raise rear end too much but that wasn’t the case at all. If it raised it at all, it wasn’t noticeable. Definite improvement in handling bumps, cornering, and it eliminated any squat due to my pin weight of the 5th wheel. Highly recommend for an easy install (45 minutes) and overall ride improvement.
by: Sergio08/12/2020
The bed of the truck measured 37.5" with a tool box weighing 200 lbs. The truck felt weighed down with passengers weighing 600lbs. Total weight 800lbs with a tank full of gas. After the install the truck rides smoother and certainly " like new". The stopping distance and acceleration distance have shortened drastically. I'm planning on loading up the bed and the Roadmaster Active Suspension RAS4611. My wife even drive it and she could feel the difference. "It drives like a muscle car." Buy it. Install time at a reputable mechanic shop was a 30 min. Install. I received them today at 1 pm and got it installed at 3:00 pm and finished the install at 3:30pm. It's an investment worth the price over traditional air bag system. Mechanic installed this on 2011 Nissan Titan SV.
by: Jeff 08/22/2022
Follow up to my earlier review.
On top of the excellent care and service from etrailer, the roadmaster active suspension was easy to install. My Travel Trailer has a 1200lb hitch weight so I used the black spacer. The RAS gave my truck a 1 1/2” lift. I had recently loaded my truck to the top of the sidewalls with wood for the winter. Barely put a squat in the suspension. The truck handled on the highway like it had a quarter the weight. There was no noticeable sway or body roll. Unloaded the truck handles better than it did with just the leaf springs. Does not feel like hockey puck suspension. Love the RAS kit. My truck is a 2018 Ford F-150 eco boost with the max tow package. Looking forward to hooking up the Travel Trailer this fall.
by: Rick Maybury03/26/2021
I have a 2020 Silverado 1500 6 cyl Duramax with the Diesel Off Road package (3.73 diff). Travel trailer loaded is probably about 6,000 lb. I took several measurements during and after the spring kit installation. All measurements increased about an inch including the stock suspension with trailer and equalizer bars and with the spring kit installed at 1 mm spacing. A one inch improvement overall. I took the truck on a short drive and didn't notice any difference in ride (wasn't stiffer) which is what I wanted. Good to know that I can adjust the springs to the 2 mm spacing if I want to increase the suspension assist. Going camping next week and looking forward to see how it improves handling and porpoising.
by: Michael C03/13/2024
Good quality part & easy to install. Instructions were on point as well. Once I set the truck down I did a small test & jumped on the bed a few times. I can instantly feel the difference!!!
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See what our Experts say about this RAS Vehicle Suspension
- Best Suspension Enhancement 2017 Ford F-250The best suspension enhancement by far for your 2017 Ford F-250 towing a heavy fifth wheel trailer is the RoadActive Suspension kits. They give the best stability, support, and unlike other solutions actually improves ride quality. The Timbrens are notoriously harsh so I would not recommend that route for you. So if you have factory overload springs you'd want the part # RAS3611-SLHD or the # RAS3611-SHD if you do not.
view full answer... - RoadActive Suspension Kit Recommendation for 2013 Ford F-150 Rear Wheel DriveFor your 2013 Ford F-150 that is rear wheel drive the RAS system that is recommended is the part # RAS3611 which will work great for your towing setup. Of the suspension enhancement kits that fit your truck this is widely considered to be the best option as it gives you the suspension support you are wanting but also gives you improved handling and ride quality.
view full answer... - Suspension Enhancement Recommendation for 2015 Ford F-250 Towing Travel TrailerI have a really great solution for but the SumoSprings aren't designed to make contact with axle all the time so that they would be engaged even when unloaded and also there aren't spacers available to allow that to happen so this wouldn't be your best route. Instead I would go with the RoadActive Suspension part # RAS3611-SLHD for if you have factory overload springs or part # RAS3611-SHD for if you do not have them. This is an adjustable system that would allow you to add more support...
view full answer... - Will RoadActive Suspension Kit Help With Wheel Hop on 2016 Ford F-350The RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-S is actually a great solution to eliminate the wheel hop you are experiencing. This system eliminates axle wrap, wheel hop, and bottoming out. The force that is causing the wheel hop will be absorbed by the RAS kit. In addition to solving your wheel hop problems, the RAS will also keep you level when towing or hauling while helping to reduce sway and body roll. It also helps to extend the life of your leaf springs,...
view full answer... - Best Suspension Enhancement for 2021 Ford F-350 with Truck Bed CamperFor your 2021 Ford F-350 you'd really only need one suspension enhancement kit installed on your truck. If you were to need the support of two you'd be most likely overloading the truck so your best option is to go with one setup that's as ideal as possible. Now the best option for suspension enhancement for your truck is the RoadActive Suspension kit part # RAS3611-SLHD for if you have factory overload springs or part # RAS3611-SHD for if you do not have the overload springs. The RAS...
view full answer... - Suspension Enhancement Recommendation for 2022 Ford F-350 Towing TrailerBetween Timbrens like the part # TFRTT350J and the SumoSprings # SSR-127-54 that fit your 2022 Ford F-350 crew cab long bed I would recommend going with the SumoSprings as you get the support you are wanting without causing the ride quality to be overly harsh. Timbrens do give great support but they are notorious for being pretty harsh. For my best recommendation for your truck I would recommend the RoadActive Suspension kit part # RAS3611-SHD if your vehicle does not have factory overload...
view full answer... - Spring Rate of RoadActive Suspension Custom Leaf Spring Enhancement KitAccording to RoadActive Suspension the spring rate for the standard kit # RAS3611-S is 2,400 lbs. For the heavy duty # RAS3611-SHD it is 3,600 lbs. The heavy duty # RAS3611-SLHD is the same but only designed to fit if you have factory top overload springs on your 2016 F-250. I did ask if that was the actual pounds per inch measurement since it seems rather high and they weren't entirely sure. I know this measurement correlates with the weight capacity of each so it is probably best to...
view full answer... - Will Air Bags Work On a Lifted 2017 Ford F-350The correct Firestone Ride-Rite Red Label Extreme Duty Air Helper Springs for a 2017 Ford F-350 is part # F42ZR. That said, these won't work well with most lift kits due to the design of the brackets nor will any air bags on this vehicle. If you have a lift kit installed you'll need to look into different options for support. I recommend the RoadActive Suspension Custom Leaf Spring Enhancement Kit part # RAS3611-SLHD for models with factory overload springs or part # RAS3611-SHD for models...
view full answer... - Are There Air Bags for a Lifted 2014 Ford F-350I do have an option for you but air bags don't work well on most lifted 2014 Ford F-350's due to the design of the rear jounce strike plate. I am not saying there isn't a kit that will work but due to their being soo many different lift kits out there, we'd need to know which exact one you have to confirm or deny. The main thing you are looking for is the location of the jounce strike plate. It needs to be in the factory location so the lift spacer cannot installed between this and the...
view full answer... - Does RAS Leaf Spring Enhancement RAS3611-SHD Fit A 2021 Ford F-250 4WD?The RoadActive Suspension Leaf Spring Enhancement Kit # RAS3611-SHD you mentioned will fit your new 2021 Ford F-250 Super Duty 4WD as long as it does NOT have the top overload springs. If it does have the top over load springs you would need the # RAS3611-SLHD instead. I included videos of the products mentioned for you to take a look at.
view full answer... - Suspension Enhancement Recommendation for 2020 Ford F-350 FX4The Firestone Ride Rite kit part # F95FV that you referenced would not fit your 2020 Ford F-350 FX4 model since your dimension from the jounce to the top of the axle is 50 mm. Instead what I would recommend is the RoadActive Suspension kit part # RAS3611-SLHD for if you have factory top overload springs or part # RAS3611-SHD for if you do not have any. The RAS systems provide the best support, ride quality, and handling when compared to all other options out there so they are the best...
view full answer... - Recommended Suspension Enhancement For A 2022 Ford F-350 Super DutyThe Timbren # TFF350SDC you referenced are a great choice for supporting heavy loads but are known to cause a stiff ride when your truck is unloaded. Instead I recommend RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-SHD. With the RAS Leaf Spring Enhancement Kit you'll convert your Ford F-350 Super Duty's leaf springs into a mechanically active suspension system. The RAS adjusts to your load to level your ride. This all-in-one suspension system improves...
view full answer... - What is Best Suspension Enhancement for 2022 Ford F-250 Super DutyFor your 2022 Ford F-250 the best suspension enhancement is the RoadActive Suspension kit part # RAS3611-SHD which is easy to install, is adjustable in support, improves handling and stability, and unlike other options actually improves ride quality instead of making it worse.
view full answer... - Difference Between RoadActive Suspension HD Kits For 2011 Ford F-250Good question; I reached out to RoadActive regarding the difference between the two kits for your 2011 Ford F-250, and there is indeed a difference. The part intended for trucks with an overload spring includes spacers needed for the installation after removal of the overload spring. So here is what you'll need, depending on if you have the overload spring or not: - WITHOUT Overload Spring: RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-SHD - WITH Overload...
view full answer... - Best Suspension Enhancement for 2020 Ford F-350 Towing Fifth Wheel TrailerThe RAS systems are by far the best suspension enhancement option for a truck like your 2020 Ford F-350 towing a fifth wheel trailer. You get (adjustable) suspension support which greatly reduces sag, you get improved stability and reduced sway, but unlike other options that make the ride quality rougher these actually are known to improve the ride quality. So if your truck has factory overload springs you'd want the part # RAS3611-SLHD and if you don't have them # RAS3611-SHD.
view full answer... - What RoadActive Suspension Kit Do I Need For My 2022 Ford F-250 Cab And ChassisYes The RoadActive Suspension kit # RAS3611-SHD will be a good fit for your 2022 Ford F-250 cab and chassis. Provided it does not have factory top overload springs. If it does have factory top overload springs you will want to go with # RAS3611-SLHD instead. These can be identified by looking at the top of your leaf springs and will basically look like another leaf that is not connected to the rest. I have attached a picture that should explain what they look like a bit better.
view full answer...
- Best Suspension Enhancement for 2021 Ford F-350 Towing Fifth WheelFor your 2021 Ford F-350 that has some sag when towing a fifth wheel the best option for additional support that won't hurt your loaded or unloaded ride quality is the RoadActive Suspension kit part # RAS3611-SLHD for if you have factory overload springs or part # RAS3611-SHD for if you do not have them. This kit gives you the best of all worlds as you get adjustable support, an easy install, and improved ride quality and handling. Most kits you basically get to pick one of those things...
view full answer... - RoadActive Suspension System for 2012 Ford F-250/F-350 with Factory Overload SpringsIf your 2012 Ford Super Duty has an overload spring ABOVE the leaf spring pack then you would need to use # RAS3611-SLHD. Then, to use the RoadActive suspension system # RAS3611-SLHD, the top overload spring will have to be permanently removed.
view full answer... - RAS vs Air Bags Recommendation for 2020 Ford F-350 SRWThe RAS and air bag kits provide the same basic function of additional support to tow a trailer level like what you are doing and they both are adjustable but in general the ride quality of the RAS systems is much nicer than air bags so they are what I recommend the highest. So for your 2020 Ford F-350 the RAS # RAS3611-SHD is definitely your best option.
view full answer... - Recommended RoadActive Suspension System for 2015 Ford F-250 with Overload SpringsI have a solution for you, but the RoadActive # RAS3611-SHD are not designed to work with the overload springs on your 2015 Ford F-250. Instead, you'll want to use the RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-SLHD. I've linked a review video of these systems that I recommend having a look at.
view full answer... - Comparing RAS3611-SHD and RAS3611-SLHD For 2011 Ford F-250/350The difference in the RAS kits for your 2011 Ford F-250/350 is the RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-SLHD fits trucks with the top overload springs and can fit dual rear wheel models, where the # RAS3611-SHD does not work with the top overload springs or dual rear wheels. So if your truck has the top overload springs or has dual rear wheels you will need to go with the # RAS3611-SLHD, and if your does not have top overload springs or dual rear...
view full answer... - What Leaf Spring Enhancement do You Recommend for My 2022 Ford F-250?For a great suspension enhancement solution for your 2022 Ford F-250 Super Duty when towing a 10k fifth-wheel trailer, I recommend the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-SHD. Not only does this suspension kit offer sag elimination and improves overall traction, the kit also extends the overall life of your factory springs. This is especially important since you are planning to haul your trailer often. Another great thing about the kit is that it does not...
view full answer... - Recommended Suspension Enhancement For 2017 Ford F-350 DRW To Prevent Sway From Truck Bed CamperI would be happy to help! Since you are not getting much if any sag when carrying your truck bed camper in your 2017 Ford F-350 Dual Rear Wheel I recommend going with the RoadActive Suspension Leaf Spring Enhancement Kit # RAS3611-SLHD if your truck has the upper overload springs, or the # RAS3611-SHD if your truck does NOT have the factory upper overload spring. These kits will add 3000lbs of load leveling support, but more importantly are the best option for reducing sway and body roll...
view full answer... - Bouncy Ride from the Timbren Rear Suspension Enhancement System on a 2012 Ford F-250I spoke to my contact at Timbren about the Timbren Rear Suspension Enhancement System part # TFR250SDG for your 2012 Ford F-250 and they informed me that the upper metal bracket cannot be removed. Therefore, the bump stop cannot be directly attached to the frame without this bracket. I have two options for you. You can use a shorter bump stop that will reduce the occurrence of the bump stops engaging. For this you would want to use the Replacement Rubber Spring for Timbren Rear Susp Enhance...
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Do you have a question about this Vehicle Suspension?
Info for this part was:
Expert Research:
Michael H
Expert Research:
Jameson C
Video Edited:
Jacob T
Video Edited:
Chris R
Video by:
Kathleen M
Test Fit:
Randy B
Written by:
Mary K
Updated by:
Wilson B
Updated by:
Noah M
Updated by:
Carrie F
Installed by:
Adam E
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Jenny N.
10/18/2021
This system is intended for use on vehicles in which the suspension is in good shape. It is designed to strengthen the leaf springs however is not design to correct rear sag. It does have a 30 day money back guarantee. I would recommend air bag system part # AL57396 and compressor system part # AL25856 which will give greater adjustment to the loads that are carried.
Helpful Links
Air-Suspension-Compressor-KitAir-LiftAL25856.html
Vehicle-SuspensionAir-LiftAL57396.html