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Timbren

Timbren Front Suspension Enhancement System

Part Number: TUMDF70

769 Reviews | 10 Questions

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$496.65

Retail:$584.30

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2000 Nissan Frontier

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timbren vehicle suspension towing/load leveling front axle enhancement

timbren vehicle suspension towing/load leveling bump stops

timbren vehicle suspension front axle enhancement tumdf70

timbren vehicle suspension towing/load leveling front axle enhancement system

timbren vehicle suspension bump stops front axle enhancement tumdf70

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A Closer Look at the Timbren Front Suspension Enhancement System-T44FR

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5,600-lb Capacity. Great for trucks with plows, these front hollow rubber springs help to 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 Front Suspension Enhancement System part number TUMDF70 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.

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Timbren Vehicle Suspension - TUMDF70

Highlights

Custom Fit for Your Vehicle: Mounts to existing attachment points
5,600-lb Front Load Support: Keeps the front end level under heavy gear or plow weight.
Better Steering and Braking: Maintains even ride height so handling stays steady under load.
Smooth, Stable Ride: Rubber springs absorb road shock to reduce bounce and harshness.
Less Body Roll in Turns: Each side works independently to stay balanced on corners or uneven loads.
Simple, No-Air Setup: Installs with brackets and hardware—no hoses, compressors, or gauges needed.

Features to know about

Stay Level and Confident Under Front-End Weight: 5,600-lb Suspension Support

Heavy front loads like plows or equipment can make the front end sag and throw off steering, braking, and headlight aim. The Timbren Front Suspension Enhancement System adds 5,600 lbs of capacity to help keep things level and stable. Its hollow rubber springs provide extra support as needed while still letting your leaf springs move freely with light loads. That means better steering control, improved braking, and a safer, more balanced ride when working under real weight.

Comparison showing front vehicle sag under load and level stance with Timbren suspension enhancement system installed on front axle.

Truck with front-mounted snowplow showing need for Timbren suspension enhancement to support and level heavy front loads.

Smooth Out Rough Roads: Rubber Springs That Absorb Shock

Rough pavement or bumpy terrain can make the front end bounce and wear down stock suspension. These hollow rubber springs take the hit instead, absorbing road shock before it reaches the cab. By cushioning impacts and reducing harsh jolts, they make the ride smoother and protect your factory suspension from bottoming out. It’s an easy way to take the edge off rough roads without changing your everyday ride feel.

Unloaded truck on rough road showing how Timbren rubber springs absorb shocks for smoother ride and less suspension wear.

Cut Down on Sway and Lean: Independent Spring Action

When cornering or driving with uneven loads, each spring works on its own to keep your vehicle planted. This independent side-to-side action helps reduce body roll in turns and compensates when a load sits off-center. You’ll feel more stable pulling into driveways, turning on grades, or maneuvering around obstacles.

Illustration showing Timbren suspension system reducing body roll and sway during cornering for better vehicle stability.

Built Strong and Simple: Easy Bolt-On Installation

Each kit includes two hollow rubber springs with vehicle-specific brackets and hardware that replace your factory bump stops. The system bolts to the frame above the front axle with drilling required for installation. With no airlines or compressors to maintain, it’s a straightforward setup that adds real support without extra upkeep. And with a limited lifetime warranty and satisfaction guarantee, you can count on it for the long haul.

Specs

Weight and Capacity

Capacity: 5,600 lbs

Warranty

Limited lifetime warranty
Satisfaction guarantee

UMDF70 - Front Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TUMDF70 Installation instructions

This Product Fits The Following Vehicles

2010 - 2028 Ram 4500 2 Wheel Drive
2010 - 2028 Ram 4500 4 Wheel Drive
2010 - 2028 Ram 5500 2 Wheel Drive
2010 - 2028 Ram 5500 4 Wheel Drive
2006 - 2006 Bigfoot Bigfoot Motorhome 32LX - Duramax
2006 - 2006 Bigfoot Bigfoot Motorhome 32LX - Vortec
2006 - 2007 Bigfoot Bigfoot Motorhome 32ST - Duramax
2006 - 2007 Bigfoot Bigfoot Motorhome 32ST - Vortec
2006 - 2006 Bigfoot Bigfoot Motorhome 35LX - Duramax
2006 - 2006 Bigfoot Bigfoot Motorhome 35LX - Vortec
2006 - 2007 Bigfoot Bigfoot Motorhome 35ST - Duramax
2006 - 2007 Bigfoot Bigfoot Motorhome 35ST - Vortec
2008 - 2009 Sterling Bullet
1973 - 1979 Chevrolet C-Series Medium Duty
1973 - 1979 GMC C-Series Medium Duty
2006 - 2007 International Trucks CF Series
2010 - 2010 Winnebago Chalet Motorhome 24VR
2009 - 2010 Four Winds Chateau Citation Motorhome 24SA Sprinter
2009 - 2010 Four Winds Chateau Citation Motorhome 24SB Sprinter
2009 - 2009 Four Winds Chateau Kodiak Motorhome 32B
2008 - 2008 Four Winds Chateau Kodiak Motorhome 32B - Duramax
2008 - 2008 Four Winds Chateau Kodiak Motorhome 32B - Vortec
2009 - 2009 Four Winds Chateau Kodiak Motorhome 33K
2008 - 2008 Four Winds Chateau Kodiak Motorhome 33K - Duramax
2008 - 2008 Four Winds Chateau Kodiak Motorhome 33K - Vortec
2008 - 2008 Four Winds Chateau Kodiak Motorhome 34G - Duramax
2008 - 2008 Four Winds Chateau Kodiak Motorhome 34G - Vortec
2009 - 2009 Four Winds Chateau Kodiak Motorhome 34H
2008 - 2008 Four Winds Chateau Kodiak Motorhome 34H - Duramax
2008 - 2008 Four Winds Chateau Kodiak Motorhome 34H - Vortec

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4.7

769 reviews

5 Stars		(615)
4 Stars		(109)
3 Stars		(15)
2 Stars		(6)
1 Star		(24)

by: Tom 03/20/2026

Great ordering, shipping time, cost, and supporting information. We added a snow plow and the product did everything as advertised.

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Kate F.

3/26/2026

Glad we had the right fit for you Tom! Where are you located, and how much snow did you get this last season?

by: Kerry 09/11/2026

I would say that the product is a bit pricey for what it contains. The secondary bolts came with the wrong sized nuts. Other than that, they work well to support the suspension.

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by: Water boy 05/06/2026

I have a 2006 Kodiak 2 wheel drive. Timbrin firmed up the front end to much. There in full contact with the spring. I think it to stuff and I might be removing them. The install was straight forward. Parts are as expected and quality of Timbrin is great. Just not enough cush..

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Heather A.

5/8/2026

I hear you, and that makes sense based on what you’re describing. If the Timbrens are in constant contact, they’re basically always engaged, which is why the front end feels so stiff instead of only firming up under load. You might actually be a really good candidate for SumoSprings part # SSF-281-47 (as long as your truck is a 2WD) They’re a similar concept but made from a softer, more progressive material, so they compress more gradually instead of feeling like a hard stop. That usually gives you support when you need it without taking away all the ride comfort like you’re experiencing now. Glad to hear the install went smoothly and the quality was there, that’s pretty typical with Timbren, it just comes down to how they behave on your specific setup. What were you mainly trying to improve up front, sag, handling, or just a smoother ride overall?

Jess

5/8/2026

@HeatherA I wanted to improve the ride. Im guessing there is sag i was unaware of. I expected the timbren to be a bit more progressive in it softness?? I didn't think the rubber would be in direct contact withe the spring 100% of the time. I only have 56,000 on this truck. So little use but 20 years old. Next weekend we take it for a 300 mile trip and ill determine if there going to be removed or not. Is there a return policy if satisfactory performance is not met?

by: Martin 04/09/2026

2017 Chevrolet Silverado 2500

I love these things. They are worth the upfront expense. I have them on two ¾'s, one ½, and a minivan for road trips. This particular set is full-time active up front. I have a 2" leveling kit and I'm in em no matter what. Zero complaints though. Solid performance through all aspects. I don't run any front-end attachments.

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by: Kevin H 11/03/2025

2006 Winnebago Sightseer Motorhome

For me surprisingly easy to install at 67 years old. Had immediate handling improvement and steering control.

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Nick S.

11/10/2025

That is great to hear! I am glad you were able to feel the difference right away. I am happy to hear that you were able to get them installed easily as well.

by: Bradley 09/10/2025

I installed Timbren’s front and rear on my 2020 F53 chassis motorhome. They are by far the best suspension upgrade I have done. I had previously installed Super Steer Trac Bar, Radius Rods and Safe-T-Plus, which had helped, but not as much as I had hoped. The Timbren’s finalized the package and it drives good now.

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by: Ethan 01/05/2026

1998 Chevrolet Blazer

Easy install, didn't even need the brackets for my application. Really helped with sidesway in the wind and seems to help the front from dipping with extra weight. Haven't tried plowing snow yet but I think they will make a major difference

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by: Dan G 06/29/2025

Installation was not too hard, Install Videos explain all steps in great detail. BumpStops arrived in excellent condition and was delivered in a timely manner

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Brooke M.

7/9/2025

Happy to hear that, Dan! Thank you for sharing all the photos, too. What are you towing now that you have a some extra suspension support?

Dan G.

7/9/2025

We tow either a Honda Pilot or SantaFe on a tow dolly

Brooke M.

7/11/2025

@DanG Ooo nice! Been on any trips recently?

by: Urgen 09/10/2026

2023 Ford Transit Connect

It good but one side with no bump had to be put spacer but the spacer was flat so the bolt did not have a lot of thread so I grind the spacer a bit so it could stay flush otherwise this might solve the problem of outter tire wear that ford transit has will find out soon

by: 2022 23XG Ford E350 09/17/2026

2022 Ford E-Series Cutaway

Super simple installation that took about 20 minutes. These made a HUGE improvement on steering control and bounce. Driving on the freeway is a breeze. I highly recommend this product.

by: Tory 07/26/2025

I watched installation videos for my FFF 53 Timbren suspension parts three times to familiarize myself with what I was going to be doing. This did help. I would say you need a little bit of experience in working on cars or trucks. This is a straightforward job with no fabricating needed. The hardware was correct. The instructions were correct. The parts fit great. I did this installation by myself. Another set of hands wouldn’t hurt but not necessary. If you’re on the fence on buying parts from Timbren, I would say go ahead and place your order.

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by: Bradley 09/01/2026

I haven/t installed them yet. I think I should have gotten a discount for the age of the "box"s the Timbrens were in. May be a credit ,, Brad

by: E 06/03/2026

Nissan Leaf

Pretty pricey but well worth it. Put these all the way around at the same time as new rear leaf springs on our c7500 topkick and it made a huge difference. It's a top heavy bucket truck and it would rock and roll just turning a corner to the point it was downright scary. Now thats greatly reduced. They also smoothed out the ride especially when loaded more than I expected.
Install was simple, perfect fit. Worst part was grinding out the rivet on the old bracket

by: James 07/20/2026

2008 Winnebago Vista Motorhome

Install was straightforward. Hardest part was getting the old bump stops out. Sway was greatly reduced on the Interstate and the rock and roll by passing semis was greatly reduced. Wish I had bought these sooner!

by: Scott 03/22/2025

These bumpstops really work, they stop the front end vibration before it travels through the shocks and springs, for a smooth ride

Scott One Year Later

3/23/2026

Still working fine, the truck’s suspension has settled now the the ride is even bettet

by: Robert 05/09/2019

I had a problem with getting front sumo springs relative to the rear sumo springs I purchased earlier; however, the staff at etrailer were very helpful in getting me a suspension enhancement component made by timbren which I just installed. I believe the timbren supports are going to do the job I was looking for and make me just as happy as I am with the rear sumo springs. You will notice from the photos the supports make direct contact; however, the pictures were taken on a unlevel surface and when the truck is on a level surface the direct contact is equal on either side. Also, the timbren supports provide substantially more weight capacity in the event I choose to haul my scooter on the front end of the truck. Thanks again Derek S and etrailer staff I am very pleased with the service, customer relations and professionalism experienced when ordering my parts. Thank you, Bobby (Louisiana).

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Bobby L. One Year Later

5/10/2020

The timbren springs are working out better than expected. I installled new Monroe matic RV shocks front and rear on my 2006 Chevy Silverado 1500 just prior to putting the timbrens on the front and the sumo springs on the rear and the ride is great especially with a load or hauling my travel trailer and the ride is just as smooth empty. I highly recommend the timbren and sumo springs because they fit by application and there is nothing additional to buy. Thanks etrailer.

by: Jeffery 08/03/2022 One Year Later

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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Jeffery One Year Later

8/4/2023

I have upgraded towards trailing with my truck camper Artic Fox 990. I have not had the time to reach to etrailer for a solution with my 1998 Dodge 2500 timbrens installation. I have a new addition and will install the timbrens on a F-550 to have the same travel assurance...Pre trip test run to Key West early this winter... Anchorage 2024 Spring...Thank you etrailer

by: William 08/02/2026

The front Timbren are working very good.The rear not so good

by: Kolby 07/28/2026

Have them on several trucks now and couldn't imagine running snow plows without anymore.

by: Ron H. 05/22/2019 One Year Later

2010 Dodge Ram Pickup

I have a very heavy "Cattle Guard" on the front of my RAM 3500 and this combined with the heavy 4WD and diesel engine the extra support from the Timbren Front Suspension Enhancement System definitely keeps the front suspension from bottoming out.

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Ron H. One Year Later

5/24/2020

Working GREAT!!!!

by: Gabriel 02/22/2025 One Year Later

Ok it’s been a year since I’ve had the springs and I’m impressed. With how easy the install is and what you get out of it these are truly amazing. No more “squishy” feeling when towing my 22fy travel trailer. The ride is a little bumpy but I don’t care. I’m glad I found these.

Gabriel One Year Later

2/23/2026

Still going strong. The ride is a little bumpy but when I tow the truck doesn’t feel “squishy” whenever I make my turns. I’m still super happy about the product.

by: Samuel 11/26/2024

A+++ Excellent product and customer service. Bought both front and rear suspension enhancements and worth it. Highly recommend.

Samuel One Year Later

11/28/2025

Great product. Very solid and holding up well in my motorhome. My friend has sumo springs and they have a softer ride, but they had to be replaced after a few years, due to his weight distribution. Mt Timbrens seem much stronger. A little bit firmer ride, but the shocks balance that out. I would buy them again.

by: K Todd 03/23/2026

I like using Etrailer because i can call and talk to a person. These front ones went in pretty easy just like directions said. and they got rid of the bad bumping sound in my front end after hitting a bump. smoothed things right out.

by: Michael 04/28/2026

2020 Ford F-53

The bump stoppers are solid and the directions for installation were clear, even for DIY. The Ford F53 chassis for the Entegra Emblem is challenging to navigate. We found two sets of hands worked best. And installing the bolt from the top of the frame with the washer and nut below worked best.

by: Russ 12/01/2016

2015 Mercedes-Benz Sprinter

Works Great
20 min job
turn tires all the way to side, can reach in without taking off tire.
Put on rear timbren last year.
Should of put fronts on same time.

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Russ J. One Year Later

12/1/2017

Very happy with upgrade, really need both front and back.Have sold the Class C.Now have a Winnebago Paseo.Installed on rear already.Wish I could also find a timbre for the front.

769

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SumoSprings Recommendation for 2018 Thor Vegas 27.7 Built on E-450 Chassis
Yes, we do have confirmed SumoSpring fits for your 2018 Thor Vegas 27.7. For your 2018 Thor Vegas built on a Ford E-450 van chassis you can use front SumoSprings # SSF-106-40 or # SSF-106-47 if the vehicle is 2-wheel drive. There is no SumoSpring option for 4-wheel drive models but if you have a 4x4 then you can instead use Timbren springs # TUMDF70. The difference between the 2 SumoSpring options is capacity. Set # SSF-106-40 is rated at 500 pounds at 50 percent compression whereas...
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Recommended Front End Suspension Enhancement for a 2007 Jayco Seneca Motorhome
The best option for front end suspension support for your 2007 Jayco Seneca Motorhome is the Timbren item # TUMDF70. These front hollow rubber springs have a 5,600 lbs capacity. They will help stabilize and level your motorhome and provide a more comfortable ride by absorbing road shock and improving roll stability. The Timbren item # TGMFTK is way over capacity for your motorhome and will give you a pretty stiff rigid feeling. The SumoSprings item # SSF-281-47 do not fit your Jayco...
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Suspension Enhancement for 4-WD 2021 Dynamax Isata 5 Motorhome 28SS Built on Ram 5500 Chassis
I suggest the Timbren Rear Suspension Enhancement System, # TDR550. These hollow rubber springs sit above the rear axle to help stabilize and level your Dynamax Isata 5 Motorhome. Because they work independently, the side-to-side movement helps to compensate for off-center loads. For the front suspension, I suggest the Timbren Front Suspension Enhancement System, # TUMDF70. These front hollow rubber springs help to stabilize and level your Dynamax Isata 5 Motorhome and provide a more...
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Troubleshooting Front End Sway Of A 2022 Entegra Odyssey 25R Class C Motorhome With SumoSprings
A half inch gap between your SumoSprings # SSF-106-47 and the front axle is well within the normal range. The SumoSprings you installed are on the softer side of the spectrum so if you're experiencing a lot of sway you would actually want to go on the heavier side with the Timbren Front Suspension Enhancement System # TUMDF70. These Timbren springs have a combined 5,600-lb capacity and are much stiffer than the SumoSprings which will only reach their max capacity of 500lbs each when they...
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Recommended Suspension Enhancement For 2016 Ram 5500
The Vin number doesn't help me find your current capacities, but I have the information needed to help with a solution. We have suspension enhancement systems that work with your current suspension to help with support and reduce sag. Your current payload is between 10,000 lbs and 12,300 lbs. So your current leaf springs are between 5,000 and 6,000 lbs minimum. I recommend the Timbren Rear Suspension Enhancement System # TDR5500 for the rear of your 2016 Ram 5500. This is a confirmed...
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Suspension Enhancement for a 2005 Ford F-650
It sounds like you're looking for air bag suspension for your 2005 Ford F-650. While we don't carry traditional air bag suspension for this, we do carry a variety of jounce-style suspension for it. These have the benefit of not needing constant maintenance and also working progressively with the amount of weight in your bed, making the ride more comfortable when unloaded. For your rear axle, I recommend the Timbren Enhancement System, part # TBDR750. These will reduce your truck's sag...
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Front Helper Springs for a 2018 Thor Vegas Built on a Ford E-450 Van Chassis
For your 2018 Thor Vegas built on a Ford E-450 van chassis you can use front SumoSprings # SSF-106-40 or # SSF-106-47 if the vehicle is 2-wheel drive. There is no SumoSpring option for 4-wheel drive models but if you have a 4x4 then you can instead use Timbren springs # TUMDF70. The difference between the 2 SumoSpring options is capacity. Set # SSF-106-40 is rated at 500 pounds at 50 percent compression whereas # SSF-106-47 is rated for 1,000 pounds at 50 percent compression which would...
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Recommended Sway Control and Ride Suspension for 2004 Gulfstream Independence with Ford f-550 Frame
For your 2004 Ford F-550 motorhome chassis, the Roadmaster Rear Anti-Sway Bar # RM-1139-143 is the correct fit for your motorhome if it is up to 34 feet long. It if it longer, then you will instead use # 1139-144. The rear anti-sway is the most help out of all components. You will likely need longer u-bolts # RM-590050-00 or # RM-590050-10. Next, the Front Anti-Sway Bar # RM-1139-148 is the next best step followed by the Roadmaster Reflex Steering Stabilizer with Mounting Brackets for...
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2007 Gulfstream Vista Cruiser Freightliner Sprinter Chassis Sway Bar and Suspension Enhancement
For your 2006 Freightliner Sprinter Chassis I recommend the Roadmaster Rear Anti-Sway Bar Item # RM-1209-132 which will minimize side-to-side movement to improve overall stability of your vehicle and diminish effects of crosswinds, passing motorists and shifting cargo. I also recommend adding Sumo Springs Solo Custom Helper Springs - Rear Axle Item # SSR-329-47 to help with the stability in the rear of your vehicle and help prevent you from bottoming out. I've attached some videos that...
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Dimensions of Timbren Front Suspension Enhancement # TUMDF70
Unfortunately, I wasn't able to get the exact measurements for you. I contacted Timbren because we don't have the # TUMDF70 in our warehouse. They did tell me the bolt holes will line up with the frame for their application. So you can compare them to the bolts on the front of your truck you should be able to verify the 3 inches. The height of the spring itself is 5-1/8 inches so it'll definitely be taller that what you have. The bracket will add maybe another 1/4 inch or so.
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