Timbren Rear Suspension Enhancement System
Item # TTORSEN
Retail:$297.00
Our Price: $252.45
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2003 Toyota Sienna
2 Wheel Drive Models
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2003 Toyota Sienna - Timbren Rear Suspension Enhancement System
- Jounce-Style Springs
- Rear Axle Suspension Enhancement
- Timbren
- Standard Duty
2,400-lb Capacity. These hollow rubber springs sit above the rear axle to help stabilize and level your Toyota Sienna. 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: 2,400 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
Whether you're hauling heavy loads in your bed or cargo area or 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.
The Timbren system comes with custom-fit brackets that are bolted onto each frame rail above your rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the leaf 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.
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.
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.
Because your 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.
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.
TORSEN - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren
Installation Details
Customer Satisfaction Score:
92% were satisfied with this product
8% of customers were not satisfied
- Defective
Customer Reviews
Timbren Rear Suspension Enhancement System - TTORSEN
Average Customer Rating: 4.7 out of 5 stars (4945 Customer Reviews)
2,400-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: James07/06/2021
2000 ToyotaSienna
TOP OF RATING IN ALL MAIN POINTS. QUALITY. SERVICE. EXECUTION OF ORDER.
Comments
We are very pleased with the long term performance, and mechanical characteristics. NOTE: product arrived, out of the box impeccable machining, assembly, and, finish coating.
James - 07/16/2022by: K03/21/2023
Great! Keeps our 2001 Sienna from being too squashed. A little rough when there's no trailer though, but I still wouldn't be without them.
by: Antar08/18/2022
by: Michael02/02/2023
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
I was back and forth between Timbren SES and airbags. Everyone in forums were very biased toward air bags and very opinionated on the Timbren SES. Yet I could find one instance in which someone tried the Timbrens, were dissatisfied and then switched to air bags. I called etrailer, Jamie recommended this product to me for my application. Installation on a 20-year-old truck had me nervous, I live in the Midwest and have a lot of salt. Installation was a breeze, and I have a B&W 5th Wheel Hitch (turnover gooseneck ball). This made the install a bit more challenging simply because I had a large bolt through the frame directly above my bump stop nut. If you do this install with the B&W Hitch, get a set of gear wrenches, or borrow a buddies 15mm and 9/16 wrenches. You need the 15mm to remove the factory nut and the 9/16 to install the Timbrens. I sprayed wd40 two nights in a row prior to installation to make sure I had good penetration of oil - I didn't break a bolt or a knuckle. I recommend installing the Timbren spring to the mounting plate, then install the mounting plate with Timbren to the truck. I didn’t need to remove my wheels or my spare, I jacked up the back under the hitch, used jack stands and let the weight of the axle separate the rear end from the truck giving ample room for the installation. After installation, I checked the clearance of the TImbren from the axle and had 1 inch of clearance. I installed my 1200-pound pickup camper and the springs just started touching the axle. I have a 21-foot fiberglass boat and seen about a 1/4-inch drop after I connected it to my truck. These things work and best part is – no maintenance and no danger of shifting weight if an airbag lost pressure or was punctured/damaged. I hunt with this vehicle and drive through thick brush and timber, I feel airbags wouldn’t hold up with the abuse I put my truck through. The Timbren SES system took the squat out of my truck and made the drop from the connection of my heavy boat hardly noticeable. Thank you etrailer, great experience as usual!
by: Randy11/20/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
The hardest part was the de-installation of the factory bump stop. Installation of the Timbren’s was simple and easy.
My truck is 2008 F250 V10 Crew Cab 4x4 with factory overload springs. I have a B&W fifth wheel & gooseneck hitch installed. I did notice the difference in towing my 34’ fifth wheel trailer. The ride and handling was improved. I would recommend them.
by: Shaughn10/21/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
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: Kevin12/26/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
They may be a great product but they did not work on my 22 f350. Even with the spacers provided they would not make contact with the trucks axle even with a heavy slide in camper. If I am going to keep them I’ll have to make welding modifications to extend the bracket so it will work on my truck model pictures with and without the camper loaded.
I would like to update my review to say that Timbren came through and made my application work by sending me the right parts so my truck doesn’t squat and it handles my truck camper much better. Timbren has great customer service
Comments
I see what youre saying here. From the photos, it looks like you have everything set up the way it should be. 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.
-- 
Brooke M - 12/29/2022by: Robert12/18/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
I installed Timbren on front and rear of Georgetown motorhome. The install was easy and the improvement in overall handling was noticeable. No more bottoming out on bad roads, and a reduction in sway or lean in and out of turns. Worth the money, especially in conjunction with my other bolt on upgrades. Safety steer, Rear sway bar, and Rear trac bar
by: Paul10/20/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
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: Gary08/05/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
The Timbren rear suspension enhancement system helped with the truck swaying side to side when the slide in camper is on the truck.
The photos show right and left rear with Timbren’s installed (2 photos), with slide in camper on the truck (2 photos) and when the camper was removed (2photos).
by: DocLane09/12/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
They definitely support and did lift my 2014 toyota tundra up about 1.5 inches.
This application with my weight has trunk riding on the cushions all the time.
That has teavel and bounce issues that do make some driving situations interesting.
I may go ahead and replace with airbags but for now support things well!
by: Earl09/17/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
Very simple to remove and install. I took all of 15 minutes without even removing the wheels
by: Chris01/21/2023
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
One of the timbrens appeared to be installed once and removed. Box said it was 2018 on it.
Comments
The second spring does look rough and I will have our Customer Service team reach out to you. I am not sure what the 2018 refers to however I know that it is not a manufacturing date. I checked and we have had recent stock checked into our warehouse. We do not have any remaining stock from 2018.
-- Jenny N - 01/26/2023by: Keton09/16/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
Great product, it works perfect on my truck. Sometimes I tow up to 30k lbs including my trailer and my truck stays level. No more high beam flashing in my eyes from drivers going in the opposite direction on the road.
by: Roger10/18/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
I have used Timberns on 2 other vehicles, a Toyota 4Runner and an S10 Blazer with out complaint.
I transport RVs as a contractor for an RV transport company. My truck is 2021 Ram 3500 crew cab, 6.7 diesel.
Because the weight of the units is different with each unit I haul I wanted an easy, no maintenance solution to maintain as level a ride as possible. I haul both bumper pull and 5th wheel units. In addition to the weight of the unit I'm hauling I can carry 110 gallons of fuel with both the factory fuel tank and my auxiliary tank. Additionally, there is the weight of my Curt 25K 5th wheel hitch, Curt 14K equalizer hitch and bars, and approximately 300 pounds in tools.
I don't have to worry about airbags not inflating. The suspension settles about an inch before making contact with the Timberns. Squat while loaded is negligible. The ride empty is the same as it was before installation. The ride loaded is smooth and controlled even when hitting large bumps at highway speeds.
Installation was simple and straightforward. It took me about a half hour.
by: Paul 01/13/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
Went on fairly easy, jacked the rear of truck up pulled out old bump stops,soapy water on new ones positioned them and with the help of two short pieces of 2×4s under each side lowered the truck, they slid right in place. Very easy. Won't be hooking up to 5th wheel for a couple of months, looking forward on how they work on truck squat. Might follow up then and give another star.
Comments
1 year later, they work as advertised, kept rear of truck at a more level stance, also a very smooth ride with very little bounce over rough highways. I would highly recommend.
Paul - 01/14/2023by: Robert01/18/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
I used this on my Isuzu tow truck. The blocks in and of themselves are fine, they support the weight. Here's the problem: They are pre-loaded, meaning that they always touch between the frame and the rear axle. As you load the vehicle this puts more pressure on the frame in this 5" area where the blocks are. The springs have not yet taken as much weight as they normally would. Now, all this upward pinpoint pressure bends the frame. This is what happened to me on my rollback tow truck. After many hours and now double plating the frame all is well again, but a tremendous amount of work. Yes, the blocks are fine, but the result of installing this product resulted in a bent frame. The vehicle was not overloaded and was within the GVWR.
Comments
I have reached out to the manufacturer who will be reaching out to you.
-- Jenny N - 01/20/2022by: Philip09/15/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
Makes my truck feel better while towing a 5th wheel camper, especially over expansion joints of the expressway.
by: Mark01/23/2023
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
Delivery was extremely slow and got the items late and the box came ripped up and all hardware was lost in shipping! I waited 4 days for the item and called them and they sent out all new hardware and had to wait another 5 days for the hardware. They really messed up my coming trip with my motorhome, I would not recommend this company to anyone, honestly the lousiest service you can get from a company! I do belong to several RV groups, I’ll let them know about the bad handling of my problem.
by: Paul07/18/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
I think I will be very happy with the ride when I tow our fifth wheel, it definitely needed the extra support especially on rough roads.I chose not to use the spacers because I like the softer ride when the truck is unloaded.
by: Steve02/19/2023
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
Installation was simple, took all the squat out of my 2022 F350 when pulling a goose neck 3 horse living quarters horse trailer
by: Francis02/20/2023
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
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: JWK64712/02/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
2022 Ram 3500, 30 minute install time, great product. Hooked up camper without sway bars and only squat 3/4 inch, where before 4 to 5 inches. Recieved product in 3 days with etrailer staff sending me numerous emails. Great job to etrailer staff. Thanks
by: Johnny10/15/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
I have the timbren enhancement system on my 2020 canyon. I haul a trailer with Ranger that I pull about 250 miles to hunting camp. It tows great!
by: Blake 12/29/2022
Review from a similar Timbren Aeon Spring System in Vehicle Suspension
After a year on the road, and a few thousand miles of towing our 5th wheel, the Timbren bump-stops work great. Had air bags that required tinkering and always needed to adjust the pressures. No adjustments needed with Timbren.
Pros: Easy to install, no adjustments, adds stability while towing heavy loads.
Cons: Unloaded, makes driving over seriously large bumps a bit rough with only about an inch or so of factory suspension travel.
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See what our Experts say about this Timbren Vehicle Suspension
- Recommended Suspension Enhancements for a 2003 Toyota SiennaI do have a very similar type of rear suspension enhancement option for your 2003 Toyota Sienna but SumoSprings currently does not have a fit for your vehicle. Instead, I recommend taking a look at the Timbren Rear Suspension Enhancement System part # TTORSEN. The Timbren's will do an excellent job of eliminating rear end sag, reducing body roll, and improving handling. In addition to the above features, the Timbren's will also increase the life of your existing suspension components....
view full answer... - Timbren Suspension Enhancement for a 2014 Toyota Sienna XLE, Front Wheel DriveYes, the Timbren suspension enhancement system # TTORSEN04 will fit your 2014 Toyota Sienna XLE. It will fit both 2 wheel drive and 4 wheel drive models. I have included a link to the installation instructions and a link to our informational article on Timbren springs for you.
view full answer... - Rear Helper Springs for a 2016 Toyota SiennaYes! I do recommend the Timbren helper springs, # TTORSEN04, to level the back of your 2016 Toyota Sienna when the van is loaded. It will also improve ride quality whether loaded or unloaded. I have included a link to a video showing an example installation for you.
view full answer... - Fitment of Timbren Rear Suspension Enhancement System on 2008 Toyota Sienna LE AWDYes, I contacted our representative at Timbren and she informed me that the product that you selected, the Timbren Rear Suspension Enhancement System, part # TTORSEN04, will fit your 2008 Toyota Sienna LE AWD.
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view full answer... - Estimated Installation Time of Timbren Rear Suspension Enhancement System on Toyota SiennaThe Timbren Rear Suspension Enhancement System # TTORSEN04 referenced in your question has an estimated installation time of about an hour for the whole kit on your Toyota Sienna. I have attached an installation video on a Toyota Sienna and the written instructions for you to check out.
view full answer... - 2017 Toyota Sienna Sagging When Carrying An Electric WheelchairWe do have some suspension enhancement systems (SES) that will help to stabilize and level your van when carrying heavy loads. They are designed to assist suspension that is in good working condition, but do not increase your towing capacity. I recommend the Timbren SES because they are custom fit, easy to install and designed to enhance the suspension, handling and safety of your vehicle, and will reduce sag from heavy loads. Whether your 2017 Toyota Sienna Van is a 2 Wheel Drive or...
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view full answer... - Does 2013 Toyota Sienna with Timbrens Need Weight Distribution HitchWith the Timbrens # TTORSEN04 installed on your 2013 Toyota Sienna I wouldn't worry about weight distribution for a tongue weight of only 250 lbs. If the dealer says your pop up shouldn't be used with a WD system too that's even more reason not to.
view full answer... - Recommended Suspension Enhancement for a 2011 Toyota Sienna Firestone Vs. TimbrenThe Firestone Coil-Rite Air Helper Springs part # F4155 and the Timbren Rear Suspension Enhancement System part # TTORSEN04 will both do a great job of helping handle the added weight on the rear of your 2011 Toyota Sienna which will in turn decrease vehicle sag. The Timbren springs are more designed for towing as they are stiffer and provide more support than the airbags. The airbags will still give you plenty of support for your bike rack and will not sacrifice ride quality whereas...
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view full answer... - Comparing the Timbrens and Air Lift Airbags for a 2014 Toyota SiennaIn order to help support the weight of the hitch mounted bike rack on your 2014 Toyota Sienna, I recommend using the Air Lift AirLift 1000 Air Helper Springs for Coil Springs part # AL60732 over the Timbren Rear Suspension Enhancement System part # TTORSEN04. The reason for this is because the Timbrens are only going to engage once the threshold of your suspension is reached. The weight of your bike rack and four bikes might not allow for this so you will want to use the Air Lift airbags...
view full answer... - Helper Spring Option for 1998 Toyota SiennaWe do have a suspension enhancement solution that will work with your 1998 Toyota Sienna. I'd recommend the Firestone Coil Rite Air Helper Springs, part # F4118. The nice thing about an air system is you can tailor the firmness of the suspension to fit what you're carrying or towing. The air pressure can be adjusted from as little as 5 psi all the way up to 35 psi. Timbren doesn't offer a solution for your vehicle, but in all honesty the Air Bag solution would be a better option because...
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view full answer... - How Durable are the Air Lift 1000 Air Helper Springs for Coil Springs on a 2004 Toyota SiennaThe Air Lift 1000 Air Helper Springs for Coil Springs part # AL60732 are made of polyurethane which is both durable and long lasting. That said, they can start to break down after years of use but this can vary widely based on the environment therefore the manufacturer does not provide any sort of life expectancy. They are truly the best option for suspension enhancement as you can adjust them for the perfect mix between support and confront so I recommend replacing the old set with a new...
view full answer... - Recommended Suspension Enhancement for 2009 Sienna XLE with Küat NV 4 & Loaded for a TripSounds like your Sienna would benefit from some rear suspension like the Air Lift # AL60732 or the Timbren # TTORSEN04. The Draw-Tite hitch # 75237 on the 2009 Toyota Sienna model should sit at a height of 11-1/2 inches from the ground to top of the inside of the receiver with no cargo or passengers. On page 542 of your owner's manual, I was able to find a chart with your vehicle's weight capacity, this includes occupants and luggage. I have linked the page and weight capacities to this...
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view full answer... - Transmission Cooler and Suspension Enhancement for a 2011 Toyota SiennaThe information on how much weight your 2011 Toyota Sienna can carry should be in the owners manual. From what I found the front wheel drive version can carry 1,325 pounds to 1,660 pounds inside the vehicle. The all wheel drive version can carry 1,190 pounds to 1,375 pounds inside the vehicle. A rough estimate based on the weights you have given is a total of around 1,400 pounds. If you have a front wheel drive model then you should be fine. But on an all wheel drive model you will have...
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view full answer... - Should I Install Air Bags Or Jounce Stopper Springs On My 2014 Toyota Sienna?In order to improve the towing experience with your 2014 Toyota Sienna, I recommend the Air Lift 1000 Air Helper Springs for Coil Springs - Rear # AL60732. With your vehicle you likely won't be towing all the time, and this system is perfect for that because you can adjust the bags according to your load and it will not affect your unloaded ride quality. On the other hand, jounce springs like Timbren Rear Suspension Enhancement System # TTORSEN04 could possibly affect your unloaded ride...
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