• Patented “Uro-Flex” Bushings allows the inner sleeve to rotate. Because of this free rotational design, shear and torsional stress on the bushings are eliminated. Rubber bushings are bonded to both the outer and inner sleeve and when the arm rotates, the bushings material is twisted and contorted resulting in high stresses causing premature bushing failure. In addition, Urethane is a superior polymer which does not break down over time from exposure to petroleum products, acids, salts, or ozone that damage rubber. Urethane allows the suspension to flex in uneven terrain and cornering, yet it resists vehicle roll.
  • High Pivot Points are engineered into most of our pull arms to offer unmatched stability during cornering and while operating over uneven terrain. In addition, a high pivot point offers a drastic reduction in frame rail stress. In most cases, our pivot points are as much as 8” to 10” closer to the frame rail. Having the pivot point that close to the frame helps to eliminate most frame rail maintenance.
  • Silent Drive offers some of the Shortest Mounting Envelopes in the industry. Depending on the application, a Silent Drive suspension will often fit when other suspensions are too large.
  • Most Silent Drive suspensions incorporate an “Under Arm” Positive Lift. In addition to quick lift response, an Under Arm lift offers superb driver comfort and reduced system maintenance.
  • Most Silent Drive suspensions incorporate “Huck Bolted” Pivot Points. “Huck Bolting” is recognized in the industry for its durability and lack of maintenance.
  • All steerable Silent Drive suspensions incorporate Double Coil Spring Shocks for unsurpassed stability and driver control.
  • Silent Drive has Complete Mounting and Installation Kits available for quick and easy installation. These kits include, but are not limited to: mounting hardware, air lines, valves, and brake fittings. Depending on the suspension, Silent Drive offers everything you need to do the complete installation.
  • Suspensions and Axles are Totally Unitized for reduced installation time. A unitized system includes a regulated inside-cab control panel, brake protection check valve, two quick release valves, standard brakes, wheels or hubs, drums, one lower cross member, and auto slack adjusters.
  • Silent Drive offers a Full Line of air up / air down suspensions. In addition to the steerable and non-steerable pushers and tags, Silent Drive offers Parallelograms, Drive Axle, Primary Trailer and Liftable Trailer suspensions.
  • Custom Suspension Design offers internal capabilities to manufacture custom suspensions that meet your needs. Silent Drive has the ability to adapt, modify or design around customer and market needs.
  • Finally, Silent Drive offers Customer Service unsurpassed by competitors. These services include nationwide distribution and 24-hour parts order turnaround. In addition, Silent Drive offers full-time technical help for customers and their end users.

If you are looking for Silent Drive replacement parts, visit our Silent Drive Parts landing page. If you would like to both purchase and install any and all suspension products, fill out a quote request form, and we will get back to you as soon as possible!


ALL AVAILABLE: UF-1013-FA, UF-1013-IB, UF-2013-FA, AAS-721-FA, AAS-724-FA, AAS-740-FA

Parallelogram Steer Lift Axle (UF-1013-FA)

  • Frame Adjustment: Adjustable from 33.5″ to 34.5″ frame width
  • Applications: Pusher(s) or Tag; Utilizes I-Beam steer axle; Inboard and outboard configurations available (single tires).
  • Suspension Capacity: 13,200 Lbs.
  • Axle Capacity: 13,200 Lbs.

When lifted, the top of the axle beam is 7 inches below the bottom of the frame.

Parallelogram Air Lift Suspension (AAS-724-FA)

  • Applications: Pusher or Tag; Utilizes fabricated steering axle (single tires)
  • Suspension Capacity: 20,000 Lbs.
  • Axle Capacity: 20,000 Lbs.

When lifted, the top of the axle beam is 7.5 inches below the bottom of the frame.


ALL AVAILABLE: AA-115, AA-135, AA-230-FA, AA-240, AA-1355, AA-1455


  • Applications: Pusher or Tag. Non-steer. High frame or low profile tires.
  • Suspension Capacity: 13,500 Lbs.
  • Axle Capacity: 20,000 Lbs.

When lifted, the top of the axle tube is 0.5 inches below the bottom of the frame.


  • Applications: Pusher or Tag. Non-steerable. Provides maximum roll stability.
  • Suspension Capacity: 20,000 Lbs.
  • Axle Capacity: 20,000 Lbs.

When lifted, the top of the axle tube is 1.5 inches below the bottom of the frame.


ALL AVAILABLE: AA-270-TR, AA-290-TR, AA-1255-TR, ATR-416


  • Applications: Trailer. Non-steering. High frame or low profile tires where space is limited.
  • Suspension Capacity: 14,000 Lbs.
  • Axle Capacity: 20,000 Lbs.

When lifted, the top of the axle tube is 6.5 inches below the bottom of the frame.


  • Air Ride: Provides a smooth ride and maximum cargo protection.
  • Ride Heights: 4″ to 22″
  • Suspension Capacity: 25,000 Lbs.
  • Axle: 71.5″ to 77.5″ Track Straight Non-Steer
  • Axle Capacity: 22,500 Lbs.
  • Axle Travel: 6″ minimum.

Available with Air Disk Brakes (on 6 – 9″ ride heights) or Yoke Mounts.




The Silent Drive MAXLE creates more revenue for users by increasing the outer bridge of the truck; up to 12,000 lbs. of additional payload per trip. By MAXLE-izing the outer bridge of your dump trucks, your customer’s productive payload is increased, resulting in increased revenue for you. The MAXLE’s unique adaptation (patent pending) of an extended arm in conjunction with Silent Drive’s proven air suspension systems offers a smoother ride, unlike high maintenance hydraulic systems. You also get total modular unitized construction for reduced installation time and cost. Allows 100% utilization of dump body with zero restrictions to tailgate or dump angle, while adding increased lateral loading and improved stability for total driver comfort and confidence.


  • Does not impede loading or dumping application while stowed in up position.
  • Raises and lowers with standard PTO.
  • Engineered and tested by industry leaders.
  • Extends the bridge of the truck to MAXLE-ize payload and profit.
  • Air ride suspension and a standard track steer axle offer a great ride and maximum stability.


  • Raises to provide discharge of load.
  • Raises and lowers with standard PTO.
  • Engineered by industry professionals.
  • Extends the bridge to MAXLE-ize profits.
  • Air ride suspension for greater stability and softer ride.
  • Steering axle for easy maneuverability.

This page lays out only a small introduction to each line of products Silent Drive has to offer. To view their full selection, visit Silent Drive’s website.