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  1. Vehicle Suspension
  2. Timbren
  3. Bump Stops
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Standard Duty
THIS ITEM IS NOT A FIT FOR
2007 Chrysler 300
etrailer Installation
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Timbren

Timbren Rear Suspension Enhancement System

Part Number: TFRFLX
In Stock
$269.36
Retail:$316.90
You Save: $47.54
Vehicle Suspension
Not Confirmed to Fit

2007 Chrysler 300

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3,000-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 TFRFLX can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TFRFLX

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • 3,000-lb Load Support: Keeps your vehicle level and stable when hauling or towing heavy loads.
  • No Upkeep Needed: Rubber springs work automatically with no air lines or adjustments required.
  • Smoother, Safer Ride: Absorbs road shock and cuts body roll for better handling on rough roads.
  • Prevents Rear Sag: Maintains even ride height so steering and braking stay consistent under load.
  • Protects Suspension Parts: Cushions impacts to reduce bottoming out and extend component life.

Features to know about

Keep the Rear End Level and Stable: 3,000-lb Rear Suspension Support

Heavy trailers or bed loads can make the back of your vehicle sag and throw off your steering and braking. The Timbren Rear Suspension Enhancement System adds up to 3,000 lbs of load support using hollow rubber springs that sit above the rear axle. They stiffen progressively as more weight is added, keeping the ride level and your handling steady when hauling or towing. With the rear end supported, you maintain traction, control, and proper headlight aim even when the load gets heavy.

Smooth Out Rough Roads and Bumps: Hollow Rubber Spring Design

Bumps, dips, and rough terrain can make an unloaded ride uncomfortable. Timbren’s hollow rubber springs act as shock absorbers, soaking up road shock to give you a smoother, more controlled experience. The progressive design cushions light loads while allowing the factory suspension to operate normally under everyday conditions. You keep a comfortable ride around town but gain serious damping when it counts.

Truck driving on a bumpy road without Timbren suspension enhancement, illustrating road shock and uneven ride before installation.

Reduce Body Roll and Off-Center Sag: Independent Spring Action

When corners get tight or loads shift to one side, each Timbren spring works independently to stabilize your vehicle. This helps control body roll during sharp turns or swerving maneuvers and keeps you level when carrying uneven loads. You stay steadier through curves and crosswinds, with less rocking and sway from trailers or heavy cargo.

Illustration showing trailer sway behind a towing vehicle, highlighting how Timbren suspension enhancement improves trailer stability and reduces sway.

Install It Once and Forget It: No Air Lines or Adjustments

Timbren’s system bolts directly onto existing frame points using custom-fit brackets—no drilling required. There are no air hoses, compressors, or gauges to set up or maintain. Once installed, it automatically engages under load and stays out of the way when not needed. It’s a straightforward setup that delivers reliable suspension support every time you hitch up or haul something heavy.

Specs

Weight and Capacity

  • Capacity: 3,000 lbs

Diagram showing vehicle rear suspension with Timbren springs installed in loaded versus unloaded conditions, demonstrating how the system maintains ride height and prevents sag.

Compatibility

  • Designed to work with: A suspension system that is in good working order

Warranty

  • Limited lifetime warranty: Satisfaction guaranteed

FRFLX Timbren Rear Suspension Enhancement System

Installation Details TFRFLX Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

7296 reviews
5 Stars
(5874)
4 Stars
(883)
3 Stars
(207)
2 Stars
(135)
1 Star
(197)
Review Sort Icon
by:
2016 Ford Flex
Put these on my ford flex which I use to run my handyman business. It’s always under load and I felt the difference immediately.
Nick S. profile picture
Etrailer Expert

Nick S.

11/10/2025

That is great to hear! I am glad you noticed that difference right away. What do you do for your business?

by:
2019 Ford Flex
Had to have it professionly installed.bolts were torqued to the max and access to the bolts was impossible to get clear line for wrenches, when completed ride is better and vehicle sits higher. service and delivery was great
John P. profile picture

John P.

5/3/2023

GREAT I CAN LOAD UP TO 500 EXTRA POUNDS IN REAR OF 2019 FLEX THANKS TO THESE TIMBREN SUSPENSION COMPONENTS

by:
I got them to keep my Ford Explorer from squating in the rear when loaded, it did not seem to help so I switched to air bags, should have done them first.
Katrina D. profile picture
Etrailer Expert

Katrina D.

8/20/2024

Yeah, Timbrens are built for constant use. Like, landscaping work vehicles, tow vehicles, towing trailers daily, truck campers, etc. If they are not in consistent use, then they will make your drive very stiff. If you are only needing to prevent sagging every so often and not daily, then air bags are a much better choice.

by:
Does a great job when towing a travel trailer. Really helps with windy conditions keeping the vehicle from dipping in rear with sway of trailer. Vehicle is much more stabile after the install.
by:
2016 Ford Explorer
Supports my power wheelchair and rack with no problems. Handling is the same with or without a rear load. Very easy to install, [online] video was great
by:
2018 Ford Explorer
Item is just as described, thank you etrailer for the how to video install for my Ford Explorer. Install took 1hr.
by:
The product works great on my Ford Flex
Jeffery profile picture

Jeffery

8/22/2022

Working great, it’s a nice and tough product

by:
These were very easy to install, about 15 mins each. I have not been able to test them with a loaded trailer but they look like they will certainly help with back end sag.
by:
Steve profile picture

Steve

9/8/2023

Fantastic

Mike L. profile picture
Etrailer Expert

Mike L.

11/1/2023

@Steve Thanks, we're glad you're happy with your # TFRFLX Timbren helper springs!
by:
2017 Ford Flex
Fits perfect on our Ford Flex's. Half the price compared to the shop.
by:
2012 Ford Flex
pretty ez install....fast delivery
by:
The job took about 1 hour all went well.
by:
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2016 Ford Explorer
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2018 Ford Explorer
by:
2014 Ford Explorer
by:
I'm suitably impressed with the difference i feel.
I have about 250 lbs. of static load with my topper and Decked cargo system. This put my install gap with no spacers just under the reccomended 1 inch minimum.Then add a couple hundred more pounds hauling music gear 100 shows a year, and the stop is resting on the axle.
I feel the absorption of the Timbren material is better than the flimsy stock bump stops. More cushion.
Where i really feel the difference is in the stabilty of excessive side sway when turning while loaded.
I have a gig coming up that will involve some unpaved mountain roads to get there so I think i will have a real goid idea of how these Timbren's will perform.
Instalation took me about an hour at 11 p.m.
The product it of the highest quality in design and build.
And Etrailer is a company that I would not hesitate to buy from in the future.
Thanks Dee Dee.
You rawk!!
Christopher H. profile picture
Etrailer Expert

Christopher H.

8/14/2026

Love hearing this! Really appreciate the detailed feedback and photos. That extra stability when you're loaded up can make a huge difference. And installing them at 11 at night—that's commitment. Hope they treat you just as well on those mountain roads. Safe travels and we'll definitely make sure Dee Dee gets the shoutout.

Adam R. profile picture

Adam R.

8/14/2026

@ChristopherH Dee Dee was great. Tell her I owe her a coffee!????
by:
2024 Toyota Tundra
Timbren Spring Helpers were exactly what I needed on my Tundra plus a spacer kit since I have a 3” TRD lift. They were packaged neatly, with proper hardware, and excellent instructions! They absolutely do exactly what they are supposed to do! Truck rides much better and helps level out the load!
Lazer S. profile picture
Etrailer Expert

Lazer S.

8/19/2026

Glad to hear they are working well for you, Ryan! Now that they are on, where you headed?

by:
2022 F250 Super Duty. Super easy to install. I have about 3/4" gap between the spring and the plate. Time will tell how they impact the ride quality and how much sag they mitigate with my 5th wheel hooked up.
Jay S. profile picture

Jay S.

8/14/2026

Now that its been a year Im very impressed with them. Theres no ride detriment without the 5th wheel attached and they do a great job of mitigating squat

by:
Absolutely Pleased with the TIMBRENS. They were easy to install, and took less than an hour to install both. I noticed a slight stiffness in the ride as the rear bounced over a bad roadway. Towing is great, with a nice level and smooth ride. I am glad that I did not order the heavier duty Timbrens, than what was recomended for my truck. I believe the ride would have been too stiff. If you look at the photos showing the timbrens, the truck is still lifted in the rear, so what you see is a big gap between the rubber, and the steal plate. When the truck is lowered, there's 1" of space as it should be. BTW, I have been purchasing from etrailer for years now, and I have to say that I have never had any issues with any orders. They are my go to folks for all of my vehicle suppension stuff and trailer stuff. You can't go wrong with buying from them.
Brooke M. profile picture
Etrailer Expert

Brooke M.

5/7/2025

Wow, thank you for sticking with us, Don! That is awesome. I think you made an excellent choice here. Timbrens are tough and the heavy duty are SUPER tough. Glad to hear these were a good fit. Love the photos! Is that your own property?

Don profile picture

Don

5/21/2026

The TIMBRENs work as stated during when I am pulling anything heavy. However, when the truck is not pulling anything, anyone riding in the rear seat gets a very hard jarring jolt when driving over any roadway repairs, bumps, expansion joints on bridges. I wished that I would have went with the Super Springs, or the Road Active Suspension. I may replace the TIMBRENS later.

Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

5/21/2026

@Don I'm sorry to hear that the Timbrens didn’t pan out to be as great as you originally hoped. Swapping over to the SuperSprings or the RoadActive Suspension will definitely have less of an impact on your day-to-day driving. Out of the two, the RoadActive Suspension would have the least effect. If you ever have questions about the RoadActive Suspension or the SuperSprings, let me know and I’d be happy to help out.
by:
It has been almost a year since I installed Timbren Suspension Enhancement Systems (DVF350 and DVR350R) on the front and rear of my 2003 Dodge RAM Van 3500. These bumpers replaced the OEM bump stops that were on my van. I like the Timbren bumpers much better than the OEM bump stops because they provide a progressively cushioned response for suspension compression when traveling over significant humps like speed bumps in a parking lot, or curb ramps into driveways. I did not like the abrupt stop the OEM bump stops provided when traveling over the same objects. I installed the Timbren rear bumpers first, and after a few months of use, I decided to add them to the front. In both cases, the front and rear Timbren bumpers were easy to install once the OEM bump stops were removed. Installation required reuse of the factory hardware. On my van, the Timbren bumpers are not always engaged. Under normal load and travel conditions the bumpers are relaxed and about 1/2” away from the suspension landing points. However, their presence is much appreciated and very noticeable when the van is carrying heavy loads or handling significant humps.
Kate F. profile picture
Etrailer Expert

Kate F.

5/6/2026

Glad to hear the Timbren systems worked out so well for your RAM Van Mitchell! It’s great that you noticed the smoother, more progressive response compared to the factory bump stops, especially under load. Thanks for sharing your experience with both the front and rear installs, that’s really helpful for others considering the upgrade. What kind of loads are you usually hauling with your van?

by:
The timbres bump stop is exactly the right height to meet the axel when the trailer is connected with all its weight onto the hitch. I have an Andersen weight distribution hitch and it levels out perfectly. The day picture is with the coach (Winn 2100bh) with factory equipment. The night picture is after the timbres are in place. Looks good.
Lazer S. profile picture
Etrailer Expert

Lazer S.

6/16/2026

They definitely look like they are helping, Orlando! How are they when you aren't towing? We hear a lot of people say they can be pretty harsh when unloaded.

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See what our Experts say about this Timbren Vehicle Suspension

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    Hello Kevin, thanks for reaching out. An air suspension kit like the Air Lift # AL60821 is a great option for the 2018 Ford Flex Limiterd AWD since it allows for adjustability. If you want to skip over that, the next best option is the Timbren Rear Suspension Enhancement System # TFRFLX. These will help to support the rear end by reducing sagging and improving stability. They have a 3,000 lb capacity so they will make a noticeable difference. The only downside of Timbrens is they can make...
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    Clyde, using Timbrens like the Timbren Rear Suspension Enhancement System # TFRFLX will definitely help reduce rear sag. These springs have 3,000 lbs of load leveling capacity, increases stability, and includes custom-fit brackets and hardware. If you still have sag after adding the Timbrens, then you need to adjust the head on your weight distribution system so that more weight is redistributed to the front.
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  • How to Keep the Rear End of a 2017 Ford Explorer from Sagging When Towing a Trailer
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  • Recommended Suspension to Help Sagging on a 2012 Ford Flex
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  • Will Timbren Rear Suspension Enhancement System Fit a Lifted 2017 Ford Explorer
    In order to install the Timbren Rear Suspension Enhancement System part # TFRFLX on a lifted 2017 Ford Explorer you'll indeed need spacers to fill the gap. The best option is to match the height of the spacer to the actual lift. We offer both 1" part # A25723-90AH00 and 1/2" part # TA25722-90P00. Please note, because of the spacer's you may need to source longer hardware to attach the spring to the bracket.
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Info for this part was:

Employee Tyler C
Written by:
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