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  1. Vehicle Suspension
  2. RAS
  3. Leaf Springs and Helper Springs
  4. Towing/Load Leveling
  5. Heavy Duty
  6. Rear Axle Suspension Enhancement
FITS 2002 Ford Excursion
RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty
RAS

RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Part Number: RAS3621-HD
In Stock
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$589.00
Vehicle Suspension
Confirmed to Fit
2002 Ford Excursion

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2002 Ford Excursion vehicle suspension from RAS. Product reviews from other Excursion owners. Expert vehicle suspension advice with thousands of helpful questions and answers. Great prices and fastest shipping.
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2002 Ford Excursion - RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

  • Leaf Springs and Helper Springs
  • Towing/Load Leveling
  • RAS
  • Heavy Duty
  • Rear Axle Suspension Enhancement
  • Suspension Only
  • Helper Springs

3,000-lb Capacity. Convert your Ford Excursion'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.


Diagram of RAS Installed

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

Close-Up of RAS Tension Spring

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

RAS Eliminates Axle Wrap

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

RAS eliminates 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

RAS Levels Your Ride

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

Adjusting Spring With Spacer

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

RAS Once Installed

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 Construction Close-Up

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.



3621-HD RAS Custom HD Active Suspension System for OEM Leaf Springs - Rear Axle

Installation Details RAS3621-HD Installation instructions

Video of RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Let’s Check Out the RoadActive Suspension Custom Leaf Spring Enhancement Kit-RAS34FR

What's up everybody, Adam here with etrailer. Today, we're gonna to be taking a look at a very popular suspension enhancement kit for your truck. And it's the Roadmaster suspension enhancement kit. Be sure to use our fit guide, put your vehicle's year, make, and model in there, and that's going to give you all of the compatible suspension systems that you can get for your truck. So this add-on component isn't going to require us to take any of the factory equipment off, so I really liked that. Buy a new truck, you want a little bit more help with the suspension.

You don't really have to remove anything that's already there, that's kind of cool. So another thing that's nice about that, adding another component that's going to take some of that load is just going to put less strain on your components. So these three leaf springs are handling, let's just say, 5,000 pounds. Now we have a fourth component, so that can be divided by four, instead of three. It's just gonna prolong the life.

It's gonna prevent any axle wrapping, any bottoming out of any sorts. And this is going to be a lot less maintenance than your typical airbags. And the cool thing about it is just like airbags, we can kind of adjust it, but this one we can as well. I actually think that this is a lot smoother than airbags because I've ridden with air bags, with no load on them, and it's like riding just on bricks. It's feels like there's not any suspension at all.

So the coil springs really gonna help that. It does have a powder-coated finish to it as well, so it's not really gonna rust away over time. So, I definitely think that this is probably one of the best things you can get for your truck. And even above airbags. This is also gonna help limit your sway that you might feel whenever you're going down the road, whenever you're hauling something.

A lot of times, whenever your trailer gets off centered, the opposing side of your suspension's gonna kind of correct for that. But having a little bit more support is gonna be good because it's not gonna over-correct and that's when all that crazy sway starts to happen. Also, with air bags, a lot of the times you don't have a whole lot of travel. We're not really limiting our travel here, we're just kind of beefing it up a little bit. With limited travel, whenever you hit bumps and stuff, sometimes you start hopping your back end off of the road whenever we're not hauling something. With this, we're not gonna have to worry about that just because it's just a little bit tighter suspension. It's not really completely locking it in with a set of airbags. Comparing them to upgraded bump stops. A lot of them that we sell are just a little bit bigger than this, so they start to hit the axle a little bit sooner. But, whenever the suspension isn't sagging that much, you're not really getting the benefits of it, because it's only activated when it's under load. So this it's activated and right now. So you don't really have to worry about you getting to that point for your upgrade to start kicking in. With this, you can have it kick in right on the get go. Well I called my buddy Joe and he's to put some weight in the back of the truck. This is about 1500 pounds, give or take, so it's quite the load. Oh wow. I can already see the spring workin'. So this is gonna be very interesting on our test course. Thanks, Joe. You're the best, I really appreciate it. Ooh nice. Right as he lowers it down, I don't know if you can see it on camera, but that spring is definitely workin'. Less load on my leaf springs. That's what we're really going for here. Oh wow. I can definitely tell a difference. My truck is typically not happy with this much weight, but it just feels tighter. Meaning, I just feel like the suspension is doing more sooner, just so I don't hit those overloaded springs down at the bottom. Cause' that's when you can start really messing stuff up, you overload em' too much and then release strings will not work as well anymore. You're looking for the easiest way to beef up your suspension, but also have some adjustability. The Roadmaster suspension enhancement system is gonna be great for any type of truck that you may have. These are definitely something that I would use. And again, this was the Roadmaster suspension enhancement kit, and I'm Adam with etrailer..

Customer Satisfaction Score:

Ratings & Reviews

4.7

587 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.

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See what our Experts say about this RAS Vehicle Suspension

  • Still Experiencing Sway with RoadActive Suspension and Blue Ox Weight Distribution System
    It sounds like you added the RoadActive Suspension Custom Leaf Spring Enhancement Kit part # RAS3621-HD to the 2004 Ford Excursion along with the use of the Blue Ox Weight distribution system on the Outdoors RV. The spring bars of the weight distribution system tension could be set too high causing the suspension of the truck not to flex. If your leaf springs are not flexing then the RoadActive Suspension is more than likely not engaging. I recommend to back off the tension of the spring...
    view full answer...
  • Recommended Suspension Enhancement for 2000 Ford Excursion With 7 Lift
    The SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-109-40 are designed to be installed on vehicles at stock height. There are no spacers or other SumoSpring models designed for a lifted 2000 Ford Excursion like yours. Because of the size of your lift I recommend adding the RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3621-HD for suspension enhancement. The RAS kit installs on your leaf springs so the lift won't be a problem. This turns your leaf...
    view full answer...
  • RoadActive Suspension Options for a 2001 Ford Excursion 4x4
    The RoadActive Suspension kits, # RAS3621 for 2,000 pound capacity or # RAS3621-HD for 3,000 pound capacity, only fit the rear leaf springs on a 2001 Ford Excursion 4x4. There is no front option. So provided that your Excursion has rear leaf springs you can use either kit regardless of the type of suspension that is on the front. I have linked a video showing the features of the RAS systems.
    view full answer...
  • How Tall is The Timbren Rear Suspension Enhancement System # TFREXC4 For a 2000 Ford Excursion?
    The Timbren Rear Suspension Enhancement System # TFREXC4 is 5-1/16" tall. It sounds like they used lift blocks placed underneath the jounce spring pad and your current springs are sagging. If you were to install these with your current air gap of only 7/16" it would create a very harsh ride experience. So if you choose to go with these you will want to replace your current leaf springs to get the air gap closer to the recommended 1" from Timbren so it will not give you as harsh of a ride....
    view full answer...
  • Should Roadactive Suspension Kit be Used with 2003 Ford Excursion
    Your best solution for your 2003 Ford Excursion would be with just the RAS kit part # RAS3621-HD as this can give you up to an additional 3,000 lb of suspension support, is only solution that also improves ride quality and stability and is easy to install. If you try to use with another kit the ride quality is most likely going to be harsh and unpredictable since it hasn't been tested together.
    view full answer...

Do you have a question about this Vehicle Suspension?


Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jeff D
Installed by:
Jeff D
Employee Adam E
Installed by:
Adam E
Employee Jameson C
Expert Research:
Jameson C
Employee Chris R
Video Edited:
Chris R
Employee Mary K
Written by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M

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