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Timbren Industries DRTT3500D Rear Severe Service Suspension Enhancement System

Manufacturer

Timbren Industries

<h3>About Timbren Industries</h3><p>Timbren Industries is a privately held, family-owned company headquartered in Whitby, Ontario, Canada, with a story rooted in a single bold idea: that vehicle suspensions could — and should — work better. Founded in 1968 when entrepreneur Arnold Heron acquired the North American patent rights to a novel hollow rubber spring design known as &quot;Aeon,&quot; Timbren has spent more than 55 years turning that insight into a lineup of suspension upgrade products trusted by weekend haulers, fleet operators, and off-road enthusiasts alike. The company name itself is a nod to family roots — a combination of the names of Arnold's two children, Tim and Brenda.</p><h3>The Aeon® Rubber Spring Advantage</h3><p>At the heart of every Timbren product is the proprietary <strong>Aeon® hollow rubber spring</strong>. Unlike conventional steel leaf springs, which operate at a fixed linear rate, or air suspension systems that require ongoing pressure monitoring and maintenance, Aeon® springs feature a <strong>progressive spring rate</strong> — meaning they work harder as the load increases. The result is a suspension that stays calm and controlled under heavy towing or hauling, yet rides smoothly when the truck is empty. The self-damping properties of the rubber also act similarly to a shock absorber, cushioning road impacts without any additional components.</p><p>This &quot;install it and forget it&quot; philosophy is a key reason Timbren has earned a loyal following. There are no air lines to route, no pressure gauges to check, and no risk of a sudden air leak leaving you stranded with an unstable load on the highway. Every SES kit is engineered to bolt directly onto factory suspension mounting points, making most installations achievable in a driveway without specialty tools.</p><h3>Product Lineup: From Work Trucks to Off-Road Trails</h3><p>Timbren's flagship <strong>Suspension Enhancement System (SES)</strong> product line covers a vast range of vehicles — from compact SUVs to heavy-duty pickups and commercial rigs. The <a href="/13739-timbren-industries-suspension-rubber-helper-spring-kit-14989">Suspension Rubber Helper Spring Kits</a> represent the core of this lineup, replacing OEM bump stops with Aeon® springs that actively engage under load to level the vehicle, reduce squat, and improve towing stability. For trucks equipped with traditional leaf spring rear suspensions, Timbren's <a href="/13739-timbren-industries-leaf-helper-spring-15009">Leaf Helper Springs</a> integrate cleanly with the existing pack to add progressive-rate support without altering ride height when unloaded.</p><p>For drivers who prefer or already run an air suspension setup, Timbren's <a href="/13739-timbren-industries-air-suspension-helper-spring-15005">Air Suspension Helper Springs</a> can complement the existing system, providing a reliable rubber backup that adds stability regardless of air pressure fluctuations. Off-road enthusiasts will appreciate the <a href="/13739-timbren-industries-suspension-multi-purpose-bump-stop-15895">Suspension Multi Purpose Bump Stops</a> — Timbren's Active Off-Road Bumpstop line — which soften the bone-jarring jounce that occurs when a vehicle bottoms out on rough trails, keeping occupants comfortable and suspension components protected. Timbren also produces <a href="/13739-timbren-industries-coil-spring-support-10882">Coil Spring Support</a> solutions for vehicles with independent front and rear coil suspension setups, broadening their coverage across modern truck and SUV platforms.</p><h3>A Legacy Built on Innovation and Reliability</h3><p>Timbren's products have found their way onto everything from daily-driver pickups to Mack and Kenworth big rigs, a testament to the scalability and durability of the Aeon® design. The company backs every SES kit with a <strong>Lifetime Warranty</strong> and a 100-Day Satisfaction Guarantee, reflecting decades of confidence in the technology. Whether you are towing a fifth-wheel camper, hauling a contractor's payload, or navigating rocky back-country trails, Timbren Industries offers a suspension solution engineered for the real world — not just ideal road conditions.

Part Number

DRTT3500D
07/14/2036 9:17 PM
Sale Price

$398.07

In Stock (6)

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Usually delivered within 2 days

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Product Details

The Timbren DRTT3500D Severe Service Rear Suspension Enhancement System improves suspension performance when hauling heavy loads and is specifically designed for demanding applications. This severe service kit features a stiffer rubber compound intended for applications where weight is always on the vehicle, such as aerial devices, dump bodies, or slide-in campers.

Key Features:

  • Maximum safe load capacity of 8,000 lbs per pair
  • Single-convoluted Aeon Springs that resist weight more aggressively due to their shorter and wider design
  • Includes two rubber springs (3-9/16 inches tall and 4-1/4 inches wide), two 1 inch tall rubber spacers, and powder-coated steel mounting brackets
  • Requires zero post-installation maintenance unlike air bags
  • Can be installed in under 30 minutes from your driveway
  • No modifications required to your vehicle
  • Backed by a lifetime warranty

The patented Aeon hollow rubber springs cushion and absorb road shocks and automatically adjust to uneven loads and road conditions. These suspension enhancement systems sense vehicle body movement and automatically increase roll stability, eliminating wallowing along the highway and drifting in crosswinds. Rubber cushions absorb road shocks and automatically adjust to uneven loads or road conditions with no airlines or fittings to allow leaks—simply bolt the kit on for a lifetime of trouble-free suspension.

Important Note: Even though you're increasing the spring rate by adding this upgrade, this does not increase the GVWR (Gross Vehicle Weight Rating). Please make sure that the load does not exceed the GVWR set by the manufacturer.

Products specifications

Prop 65 Yes/No

No

Grade Type

Performance

like the price and the freight

quick, easy to use

Very easy and fast transaction this far. Received the shift fork and it is a quality part, installed already and everything works like new again.

K

2nd time ordering. Very satisfied.

Shipping is expensive

Inventory is easy to use and I was able to find what I was looking for with no problem at all. Not only that, Autoplicity had what I was looking for for the cheapest price I could find anywhere else. $50 cheaper than any store I walked into, and cheaper than any other web site i looked at.

Great exchange. Received product as described and in a timely manner. Thanks! Will Do business again

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