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  1. Vehicle Suspension
  2. Timbren
  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Extra Heavy Duty
Timbren Rear Suspension Enhancement System

Timbren Rear Suspension Enhancement System

Item # TFREXC4
Retail:$316.90
Our Price: $269.36
You Save: $47.54
Vehicle Suspension

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Shipping Weight: 5 lbs
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6,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use. Great Prices for the best vehicle suspension from Timbren. Timbren Rear Suspension Enhancement System part number TFREXC4 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TFREXC4

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Extra Heavy Duty
  • Timbren

6,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


Features:

  • Improves suspension, handling and safety
  • Provides additional support as needed so you always have a smooth, comfortable ride
    • Allows the leaf spring ample movement while cushioning light loads
    • Becomes more rigid as more weight is added
      • Increases stability - providing great performance while hauling heavy loads
      • Reduces vehicle sag
  • Works independently - side-to-side
    • Helps compensate for off-center loads
    • Reduces body roll when swerving and turning corners
  • Acts as shock absorbers, taking the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension


Specs:

  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 6,000 lbs
    • Do not exceed the vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guarantee


An example of sag on a vehicle's rear axle under a heavy load

Whether you're hauling heavy loads in your bed or cargo area or you're towing a trailer, you will often see the rear of your vehicle sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but also more of the vehicle's weight. Because less weight is on the front axle, the front tires are making less contact with the road. Overall handling - traction, steering, and braking - is negatively affected. But the resistance from Timbren's Suspension Enhancement System works with your factory suspension to keep your vehicle level and improve your driving experience.


Diagram of the Timbren spring installed

The Timbren system comes with custom-fit brackets that are bolted onto each frame rail above the rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the spring sits, 1" above the axle. The inch of clearance allows the existing factory suspension to operate normally under light loads and standard terrain, ensuring the smooth, comfortable ride that you are used to.


Animation of a standard Timbren rubber spring

Timbren Suspension Enhancement Systems are designed to work progressively. When the hollow rubber springs are compressed, the convoluted design causes them to quickly collapse along the folds. Once the folds are compacted, the stacked barrel shape increases resistance, stiffening the suspension and keeping your vehicle level.


Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's side or passenger's side of your vehicle. This is helpful when you swerve or make sharp turns. Each spring is activated when it is needed, so body roll is greatly reduced. The independent action also works well when you are hauling off-center loads.


An example of a trailers swaying

Because the vehicle handles better with the springs, less turbulence will be passed along to the trailer, and this helps to keep the trailer in line. Your driving comfort is further enhanced if the trailer does begin to sway (from a gust of wind or a passing semi), because the movement from the trailer is not transferred to your vehicle. This also works to make the sway subside more quickly.


An empty truck on a bumpy road without Timbren

Another great feature of the rubber construction is that the springs absorb most of the road shock, creating a smoother, more stable ride overall. Wear and tear on the factory suspension is also lessened because the rubber springs work to prevent bottoming out on rough roads.


Timbren Suspension Enhancement Compared to the Competition

Timbren's Suspension Enhancement Systems are much easier to install than air springs - there are no air hoses to run, no compressors or gauges to hook up, and no manual adjustments to make. The rubber construction makes Timbren's springs more elastic than similar products constructed of microcellular urethane. And more elasticity allows for a more comfortable ride because the rubber has more travel.



FREXC4 - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TFREXC4 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Timbren Rear Suspension Enhancement System - TFREXC4

Average Customer Rating:  4.7 out of 5 stars   (5978 Customer Reviews)

6,000-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.

by:
2003 Ford Excursion

Easy to place on vehicle, haven't put tailer on yet, but clearance is 1/2 to 3/4 inch, should be perfect.



by:
2001 Ford Excursion

Product installed very easily, spacing seems a bit much from the bottom of the product to the axle, but that could just be me. Nothing against you guys, but the package was delivered VERY damaged, some of the contents were showing outside the box.

Etrailer Expert

Patrick B.

2/1/2013

There should be a sizeable gap between the Timbren springs and the vehicle axle. The Timbren kit should only engage the axle when the vehicle is bearing a hefty load. This is to prevent un-loaded ride quality from being altered, but provide extra support when a heavy load is in the mix.



by:

The Timbren rear suspension enhancement system works great. It leveled my 2000 Ford Excursion Limited with my 31ft. 6000lb camper before using the weight distribution hitch. Before my excursion sagged in the rear. The crew at etrailer were Awesome! Great customer service and they upgraded my shipping for me for free. Only took me 30 minutes to install. Thanks etrailer!



by:
2000 Ford Excursion

Installed on 2000 Ford Excursion to keep rearend from sagging when towing 24' Thompson 240 Fisherman Hardtop Boat. Worked like a charm once I got the stock bumpers off. Had to get the [$] [discount store] 4" Grinder out to remove stock bumpers. Works great, so far - just like described. Bumpers remain hanging in air with no contact until a heavy load is applied inside Excursion or on trailer hitch. Excursion remains essentially level with Thompson Boat/Trailer hitched-up.



by:
Ford Excursion

Kit does a great job making up for the underbuilt suspension on my excursion. Installation was straight forward although a bit awkward from under the truck in the driveway. The price is way high for some rubber and bolts, but that's apparently from the manufacturer as opposed to etrailer. Good product, just a shame to pay so much to make up for ford's known shortcoming.



by:

Eliminated rear end sag when towing and also stabilized the rear improving drivability. Highly recommend.



by:

Works great. Still looks like new after a year and we use it hard.



by:

James

7/15/2022

Excursion factory springs seem underrated. Timbren’s recommended spacing still allows to much rear end squat. I added more spacers for No gap. Actually helped with body roll when unloaded. This spacing was discussed with Timbren representative beforehand. Timbren has lifetime warranty



by:

These work great, highly recommend.



by:
2002 Ford Excursion

installed in about 30 min. worked as expected.














installed
in about 30 min. worked as exspected







by:

smart way to protect your safety and vehicle
Yes, buy it!!!!!



by:
2002 Ford Excursion

Easy to install



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by:
2001 Ford Excursion



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2000 Ford Excursion



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2005 Ford Excursion



by:

I know it will be lovely when loaded or the trailer on. However,it rides like a wagon empty with brand new premium shocks and struts empty. Thud thud thud. You really cannot feel the shocks or suspension. Found exact same item plentiful for 60 bucks on eBay after I bought these for 250. I may cut these in half or put air bag on. I do not like the ride empty. No hard feelings. It is a good product maybe just not for me.



by:

About a 1/2 inch difference in gap at the bump stop perch but still within parameters. Truck sits perfect with trailer attached. Haven’t towed yet. After towing if they perform like they should will upgrade to a 5 star. Easy to install, definitely needed 2x4 and jack. 2011 Silverado ext cab with 30 ft Genisis 5th wheel.



by:

Was able to install these with a 15mm flex head ratchet wrench and lifted the rear of the truck to make it easier. 30 minutes to take off 4 nuts and put em back on. 2 minutes assembling the timbrens with the added spacer. I have a f350 with a salter and plow. Loaded with salt the lights shoot up and in the snow ?? it’s like hitting hyper drive and you’re blinded. These helped big time. Very happy so far.



by:

Haven’t had it on long, but so far so good. 1999 F350 dually. Bolted up nicely. Total job took 10 minutes. Have hauled two gooseneck loads of hay and truck drives SO much better. Nice and level. Money well spent so far.



by:

The pro: The longer, heavier bump stops worked great when hauling my mustang home from Chicago. The truck stayed level and handled great.
The con: I had to remove the bump stops for everyday use. They limited my suspension travel causing a stiffer ride.



by:

I am so glad I bought these for my truck. I was able to install them myself using a jack and jackstands. The ride is bit rougher now; but the suspension is totally awesome compared to before. I am able to haul a bit more weight when needed.



by:

very good product ,received just in time and fit perfectly on my GMC savana 2000 .Be sure to clean the two receptacle thats help.
très bon produit , reçu dans les délais et s'ajuste parfaitement . Assurez-vous de nettoyer le receptacle cela facilite l'installation.



by:

The timbrens actually did what they were suppose to do. However, once I starter driving out west I notice the timbrens were riding on the axle which cause the speedometer to jump around depending on the road. I would recommend them if you are hauling or towing a camper or RV. I was going to contact etrailer about maybe removing a spacer for one set however the other set came as one unit. The bottom line is the Timbrens does stabilize your load for safe travels. I will be contacting etrailer soon to assist in correcting the problem...Road trip from Idaho,Colorado,Wyoming,and Utah were beautiful... Thank you etrailer


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See what our Experts say about this Timbren Vehicle Suspension

  • 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...
  • Timbren Suspension Enhancement for the Front and Rear of a 2001 Ford Excursion 4x4 7.3L Diesel
    The Timbren Rear Suspension Enhancement System, item # TFREXC4, is only the rear kit for your 2001 Excursion 4x4. For the front suspension you will need the Timbren Front Suspension Enhancement System, item # TFF350SD4. These front suspension helpers will definitely help with the large 7.3L motor in your Excursion. Both of these kits will require the removal of the original bump stop but will not require shock or spring removal and do not require any modifications to the original chassis....
    view full answer...
  • Comparing Timbren and SumoSpring Rear Helper Springs for a 2000 Ford Excursion
    If it were me I would install the Timbren springs # TFREXC4 on the 2000 Ford Excursion 4x4 instead of the SumoSprings # SSR-109-40. First is the cost benefit; the Timbren springs cost less. There is also the capacity difference. The Timbren springs are rated up to 6,000 pounds whereas the SumoSprings are rated up to 1,000 pounds. While neither increases the actual towing capacity of the vehicle the fact that the Timbren springs are rated so much higher is an indication of the quality...
    view full answer...
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  • Timbren Rear Suspension Enhancement Springs for 2004 Ford Excursion With F350 Leaf Springs
    Because the stock ride height has changed, the # TFREXC4 Timbrens for the Excursion would be ineffective for the very reason you mentioned. They'd be too short, and the suspension would compress a great deal before the Timbrens would make contact with the axle beam. However, we can still find a Timbren solution for you. With the wheels on the ground, measure the height distance between the top of the axle and the frame member where the factory bump stop mounts (see diagram). If you can...
    view full answer...
    Image 1 for
  • Timbren Suspension Enhancement For 2001 Ford Excursion
    The Timbren Suspension Enhancement, part # TFF350SD4, is intended to assist the front suspension you have on your 2001 Ford Excursion. This kit is for 4-wheel vehicles. Suspension enhancement is intended to be used on vehicles with suspension that is in good working condition. It is not intended to be used as a replacement for your suspension. I pulled one of these from our warehouse and took a couple of measurements. The spring measures 3-3/4 inches and the plate it is attached to measures...
    view full answer...
  • Timbren Front Suspension Enhancement That Fits 2WD and 4WD 2003 Ford Excursion
    Yes, you are on the money with the fits. The Timbren Front Suspension Enhancement System # TFF350SD2 is a fit for the 2-wheel drive model of the 2003 Ford Excursion, while the Timbren Front Suspension Enhancement System # TFF350SD4 is a fit for the 4-wheel drive model of '03 Excursion. I have added a link to a video review of this suspension enhancement for you to check out. I do want to add that if you were looking for the rear suspension units from Timbren for your Excursion, they...
    view full answer...
  • Height of Timbren Rear Suspension Enhancement # TFREXC4 for 2002 Ford Excursion V10
    The Timbren Rear Suspension Enhancement # TFREXC4 for your 2002 Ford Excursion that you referenced has an overall height of 5 inches according to my technical contact at Timbren. I pulled a set of these from the warehouse and measured them as you will see in the picture, the actual spring measures 5 inches and the bracket measures 1-9/16 inch to give you a total of 6-9/16 inches. The difference between a Timbren suspension system and an air bag system, is that the air setup allows for...
    view full answer...
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  • 2005 Ford Excursion Squats when Using Husky Weight Distribution with 9,000 Pound Trailer
    Let's first look at the numbers. A trailer weighing 9,000 pounds will have a tongue weight in the neighborhood of 900 to 1,350 pounds. But when you calculate tongue weight for weight distribution you also have to factory in the weight of any cargo loaded behind the rear axle of your 2005 Ford Excursion. So for example if your trailer's tongue weight is 1,100 pounds and you have 200 pounds of cargo behind the rear axle of the Excursion the total tongue weight would be 1,300 pounds and you...
    view full answer...
  • Troubleshooting Trailer Sway on 11,700 lb Trailer with 900 lb Tongue Weight
    If you are getting persistent sway from your towing setup the issue is more than likely not enough tongue weight in the trailer relative to the total trailer weight. Not having the tongue weight of the trailer between 10 and 15 percent of the total trailer weight is the number one cause of trailer sway. Since you said your trailer weighs 11,700 lbs and your tongue weight is roughly 900 lbs that would be the issue right there. If you can move more weight in the trailer forward you will...
    view full answer...
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  • Weight Distribution Recommendation for a 9,000 Pound Trailer and 2000 Ford Excursion
    Pro Series Weight Distribution System w/ Friction Sway Control - Round - 10,000 lbs GTW, 750 lbs TW # PS49582 is very much under rated for the tongue weight of your trailer. Considering that your measured tongue weight is 1,044 without water and other things even the 1,200 pound system # 49570 might not be enough once loaded and ready to tow. I recommend going to a 1,500 pound system such as Curt Weight Distribution System # C17333. The only other part needed is a ball. The ball you have...
    view full answer...

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Info for this part was:

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