You have no items in your shopping cart.
Search

SA-04HD Sulastic Shackle for Rear Axle

SKU: SA-04HD
Delivery date: 3-5 days
$530.00

===SULASTIC IMPROVES: ===

- Smooths out the ride by just replacing the OEM shackle

- Reduce Vibration and Shocks Not Absorbed by the Leaf-springs

- Stops the Bed Bouncing

- Improve Stability

- Reduce Braking Distance

- Load & Towing Capacity Not Affected

- Improves Handling and Control of the Vehicle

=== Set includes: 2 shackles ===

+ -

WHAT IS SULASTIC RUBBER SPRINGS?

 

Sulastic is a suspension system designed to improve a vehicle's ride quality and handling, particularly in pick-up trucks and heavy-duty vehicles. The key component of the Sulastic suspension system is the Sulastic shackle, which replaces the traditional leaf spring shackle found in many suspension systems.

The primary purpose of the Sulastic suspension system is to reduce the transmission of road vibrations and shocks to the vehicle chassis and cabin. This helps provide occupants with a smoother and more comfortable ride and reduces wear and tear on the vehicle’s components.

The Sulastic shackle typically consists of a central pivot point with elastomeric elements on either side. These elastomeric elements act as shock absorbers and allow for a certain degree of movement and flexibility in the suspension system, improving the vehicle's ability to absorb road imperfections and providing a more controlled and comfortable ride. 

Sulastic suspensions are often used in pick-up, heavy-duty trucks, RVs, and other commercial vehicles where ride comfort is important. They help reduce driver fatigue and improve overall vehicle stability. 

 

FEATURES & BENEFITS: 

  • Reduce Vibration and Shocks 60-80%
  • Improve Stability 20-30%
  • Reduce Braking Distance 10-20%
  • Stops the Bed Bouncing
  • Reduce the impact harshness over potholes & broken pavement
  • The joints at the concrete roads produce picky noise, this noise is gone when you install the sulastic.
  • Smooth out the ride by just replacing the OEM shackles.
  • Load and towing Capacity Not Affected
  • Improves Handling and Control of the Vehicle
  • Quality ride improvement in rainy, cold & hot weather
  • Requires no maintenance.
  • Set includes 2 sulastic shackles per axle.

 

8 LUG HD TRUCK ( MAGAZINE )

TEST DODGE AND CHEVROLET OEM SHACKLE

VS SULASTIC SHACKLE  

 

The following photo shows how the pick-up works without sulastic marked in blue and with sulastic marked in pink at the frame and the cab. This shows us that sulastic works within a range of plus or minus 0.2 average during the test time while the OEM shackle receives the direct impacts and is transmitted to the frame and the driver. If you want to see all the information, please visit our SULASTIC MEDIA REVIEWS

 

 SULASTIC SHACKLE VS OEM SHACKLE

The sulastic shackles SA, we recommend them for pick-up. This model is calibrated according to the curb weight of the OEM vehicle. If you already have your pickup loaded with accessories, machinery, or special equipment, and all this weighs half the load capacity or more and it will be all the times at your truck, please contact info@sulastic.com  to offer you the sulastic model that will fit in your vehicle, because you need a sulastic with the curb weight of your vehicle. If the suspension is not found in the compatibility table, you can go to the following link https://www.sulastic.com/FormMaker/Form/2 and fill out the information so we can share which model of sulastic can be used in your vehicle.

 

ENJOY THE SULASTIC AND HAVE A SMOOTHER RIDE.

 

AT TAB SA-VIDEO-REVIEWS.

 

Detailed installation and review at the end of the video. 

 

Made by: Arty’s Motorsports. 

 

It shows installation and Product Performance. 

 

Made by: Frisco Boater’s Garage.

 

 

 

 

_____________________________________________________________________________________________________________________________________
 
This area is intended to show the publications that we have found about our product by third parties, who have evaluated and found benefits in the use of sulastic products. You can click on the photo, and you can see the editor's full post.

 

Magazine

8 Lug

Short Description:

Sulastic Installation

Vibration Test

Date Released:

September 2010

Product Reviewed:

SC-07HD - 2005 Dodge 2500

SA-04HD - 2007 Silverado 2500HD

Installed on:

2005 Dodge 2500

2007 Chevrolet Silverado 2500HD

Installed by:

DIY

 8-Lug Magazine

 

 _____________________________________________________________________________________________________________________________________

Magazine

Diesel Power

Short Description:

Sulastic Installation

Date Released:

August 2010

Product Reviewed:

SA-06

Installed on:

1987 Ford F-2506.9L

Installed by:

DIY

 

 

 

 _____________________________________________________________________________________________________________________________________

Magazine

Inside Track

Short Description:

Sulastic Installation with Aribags

Date Released:

Unkown

Product Reviewed:

SC-07HD

Installed on:

Dodge RAM 3500

Installed by:

DIY

 

 

 _____________________________________________________________________________________________________________________________________

Online Reviews

OffRoad-Review

Short Description:

Sulastic Review

Date Released:

Jan 2015

Product Reviewed:

SC-07HD

Installed on:

2007 Dodge RAM 2500 4x4

Link

Sulastic Shackles Gen4 – Dodge 2500 / 3500 – www.OFFROAD-REVIEW.com (offroad-review.com)


 

 

 _____________________________________________________________________________________________________________________________________

Online Reviews

PowerStroke

Short Description:

Sulastic Review with Airbags and Helper Springs

Date Released:

July 2019

Product Reviewed:

SA-06

Installed on:

1999 Ford F-250

Link

Powerstrokeonline (Offline)

 

sa_oem_shackle sa_sulastic_shackle

Sulastic Rubber Springs SA-Models are designed to replace the original shackle of the Leaf-Spring Suspension when the shackle is under extension when applying load to the vehicle.

 

Installed on

Rear Axle with Leaf-Spring Suspension 

Part(s) Replaced

OEM Shackle

Kit or Single Part

Kit per axle

Installation type

Screw-on

(Some applications may require modifications to the vehicle)

Installation time.

(Estimated with all pieces,

tools, and experienced installers)

1-2 Hours

Truck’s Height Modification

Keeps the height between ¼”

Truck’s Load Capacities Modification

None

Installation Guide and Warranty

Version (March 2020-Current)

Click here to Download the PDF

 

Removing Shackle Lower Bolt Video

(Click Here)

 

Warranty

Version (March 2020-Current)

Click here to Download the PDF

Previous Versions of

Installation Guides and Warranties

 Installation Guide and Warranty (Version May 2011 to Feb 2020)

 English | Español)

 --------------------------------------------------------------

Installation Guide Warranty Version ( 2006 to April 2011)

 (English)

 --------------------------------------------------------------

 Warranty Version ( 2006 to April 2011)

 (English/Spanish)

 

 

 


 

 

 

Special Thanks to all Youtubers for taking the time and effort to make these videos and show your audience the benefits of the Sulastic Shackles.

We appreciate your comments on keeping us improving.

 _____________________________________________________________________________________________________________________________________

 

Made by:

Pure Speed Performance

Short Description:

Shows installation and Product Performance

Date Released:

July 2019

Product Reviewed:

SA-01

Installed on:

2019 GMC Sierra 1500

Installed by:

Pure Speed Performance

 

 _____________________________________________________________________________________________________________________________________
 

Made by:

John DiMartino

Short Description:

Shows installation and Product Performance over different road conditions / 

Date Released:

January 2019

Product Reviewed:

SA-01F

Installed on:

2017 Ford F-150

Installed by:

DiMartino Motorsports

  
_____________________________________________________________________________________________________________________________________

  

Made by:

Frisco Boater’s Garage

Short Description:

Detailed installation and review at the end of the video / 

Date Released:

March 2011

Product Reviewed:

SA-04HD

Installed on:

2006 GMC 2500

Installed by:

Frisco Boater’s Garage

 

 _____________________________________________________________________________________________________________________________________

 

Made by:

Arty’s Motorsports

Short Description:

Detailed installation and review at the end of the video / 

Date Released:

June 2020

Product Reviewed:

SA-04HD

Installed on:

1999-2007 Chevrolet Silverado 2500HD

Installed by:

Arty’s Motorsports

  _____________________________________________________________________________________________________________________________________

 

Made by:

Brian Andews

Short Description:

Detailed Installation and review at the end of the video / 

Date Released:

August 2017

Product Reviewed:

SA-06

Installed on:

2013 Ford F-250 Superduty Dually

Installed by:

Brian Andrews

  

 _____________________________________________________________________________________________________________________________________

Made by:

Cab Over Gary

Short Description:

Sulastic install /

Date Released:

May 2023

Product Reviewed:

SA-06

Installed on:

1997 OBS Ford

Installed by:

Cab Over Gary

 _____________________________________________________________________________________________________________________________________

  

Made by:

Double D Distribution

Short Description:

Shows difference between the sulastic and the stock shackle / 

Date Released:

Jan 2021

Product Reviewed:

SA-06HD

Installed on:

2019  Silverado 3500HD

Installed by:

DIY

 

 _____________________________________________________________________________________________________________________________________

Made by:

Underten reviews

Short Description:

Review of Sulastic shackles /

SULASTIC shackles. 3 year review

Date Released:

January 2023

Product Reviewed:

SA-06HD+ SC-15

Installed on:

2003 Ford F-350 Superduty

Installed by:

Underten Reviews

 _____________________________________________________________________________________________________________________________________

 

Made by:

Big Truck Big RV

Short Description:

Shows installation and review of the product / 

Date Released:

June 2017

Product Reviewed:

SA-06HDD

Installed on:

2016 Ford F-450 Superduty Dually

Installed by:

Truck Masters at Corpus Christi

 

  _____________________________________________________________________________________________________________________________________

  

Made by:

Big Truck Big RV

Short Description:

Shows the performance of the Sulastic while loaded Fifth Wheel and Load Specs on Sulastics 2100lb Fifth Wheel Pin Weight 250lb Loaded Toolbox / 

Load test on my F450!

Date Released:

June 2017

Product Reviewed:

SA-06HDD

Installed on:

2016 Ford F-450 Superduty Dually

Installed by:

Truck Masters at Corpus Christi

 _____________________________________________________________________________________________________________________________________
 
 

Made by:

Conquryourfear & Do It Urself

Short Description:

Review of the product / 

Date Released:

July 2017

Product Reviewed:

SA-07HD 3/4

Installed on:

2018 Ram 3500  Laramie Limited

Installed by:

Unkown

 

 _____________________________________________________________________________________________________________________________________

Made by:

Big Truck Big RV

Short Description:

Sulastic install and review /

Date Released:

August 2017

Product Reviewed:

SC-05

Installed on:

2002 Dodge Ram 1500

Installed by:

Big Truck Big RV

 _____________________________________________________________________________________________________________________________________

Made by:

Big Truck Big RV

Short Description:

Sulastic install and review /

Date Released:

December 2017

Product Reviewed:

SC-14

Installed on:

2005 Ford F-250 Superduty

Installed by:

Big Truck Big RV

 _____________________________________________________________________________________________________________________________________

Made by:

Tony Shelton

Short Description:

Showing how the Sulastic shackles work /

Date Released:

October 2022

Product Reviewed:

SAJ-03B

Installed on:

Heavy Duty truck

Installed by:

Tony Shelton

 
_____________________________________________________________________________________________________________________________________

Made by:

Sulastic

Short Description:

Cartoon animation describing sulastic shackle bennefits in a race competition

Date Released:

August 2011

Product Reviewed:

None

Installed on:

None

Created by:

3dmx

 


 _____________________________________________________________________________________________________________________________________

Made by:

Threaded Barrels

Short Description:

Review of suspension upgrades/

Date Released:

June 2022

Product Reviewed:

SA-06F

Installed on:

2022 Ford F-250 Superduty

Installed by:

Threaded Barrels
https://www.youtube.com/watch?v=tuFI1SbqMT4

 _____________________________________________________________________________________________________________________________________

Made by:

ShowMe Repair

Short Description:

Sulastic Install /

Date Released:

November 2021

Product Reviewed:

SAJ-03B

Installed on:

2014 Ford F-550

Installed by:

ShowMe Repair

https://www.youtube.com/watch?v=u9_n_DRZ0QM

Q. What type of warranty do you offer?

  1. We issue a limited lifetime warranty against material or labor defects for three years on rubber components, sleeves, and metal washers. And 10 years on the metal, and a 30-day money-back satisfaction guarantee. 

30days

Q. Where can I find the Sulastic Shackles Warranty?

  1. The Sulastic shackles warranty can be found on the last page of the installation guide. (Click Here)

Q. For how long has your product been in the USA market?

  1. Sulastic shackles have been in the market since 2006.

Q. Is a Sulastic Rubber Spring difficult to install?

  1. No, the complete installation process takes between 1-2 hours and only requires a basic set of tools as explained in the installation guides, which you can easily download from this website. We recommend that the installation be performed by a certified mechanic shop.

Q. What could happen to my vehicle if the Sulastic Rubber Spring breaks?

  1. If the rubber fails or detaches from the steel then, the only thing that could happen is that the Sulastic springs will be resting on the working limits and the truck could be unleveled. If this happens remove the Sulastic shackles and reinstall the original shackles.

Q. Do you sell the Sulastic by piece or by the set?

  1. It is sold by set, each set is of two Sulastic shackles which replace the Left and Right stock shackles.

sulastic shackles

Q. Could the truck bed hit the tires if one of the Sulastic Rubber Springs breaks?

  1. No. The vehicle has a limited rubber stop between the axle and the chassis. The rubber stop should prevent contact between the tires and the bed. This situation might be different for trucks that have been modified with lowering kits, larger wheels, etc.

 Q. Is the Sulastic Rubber Springs' performance affected by extreme weather conditions?

  1. No, the Sulastic Rubber Springs has been designed to perform from -60 degrees Fahrenheit up to 180 degrees Fahrenheit, however in extreme weather conditions, the life expectancy is reduced. 

DESERT   DESERT 

RANCHO  

bosque     SNOW 

 

 Q. When should the Sulastic Rubber Spring be replaced?

  1. When the rubber breaks or when the truck is empty, the Sulastic shackle is completely bottomed (SC-Model) in or stretched (SA-Model) out.

 QWhat type of maintenance is required?

  1. The Sulastic Rubber Springs does not need to be cleaned, lubed, or any other kind of maintenance.

 Q. Can the Sulastic Rubber Springs be rebuilt?

  1. No, it can only be recycled.

Q. Is the Sulastic Rubber Spring affected by frequently riding over muddy or sandy conditions?

  1. No, the Sulastic Rubber Springs are protected by an anti-corrosion coating. You should only rinse them with water once in a while when washing your vehicle.

Q. Can I weld the Sulastic Rubber Spring?

  1. No. The rubber can detach from the metal or get damaged when exposed to temperatures over 250 degrees Fahrenheit.

Q.Can I install my existing Sulastic Rubber Springs on another vehicle?

  1. It is possible, assuming that your new vehicle uses the same Sulastic Part Number. Please use our part locator to verify compatibility.

Q. Will the installation of a Sulastic Rubber Spring void my vehicle's manufacturer warranty?

  1.  No. Manufacturers, distributors, and sales representatives must honor the warranty. However, they are not forced to pay for any damages that might be caused by the Sulastic Rubber Spring.

Q. Does the Sulastic lift or lower my truck when installed?

  1. In some vehicles it can lower or lift the truck by no more than 1/4 an inch at the center of the axle.

Q. Will these affect the load or tow capacity of the truck?

  1. No, the Sulastic won’t affect the load or tow capacity of your truck at all. The product is designed to fit your truck and only helps you with the vibration, balance, and overall driving control.

Q. Does Sulastic offer a long shackle to lower the rear height?

  1. Yes, you can lower your truck by installing a Lowering Kit (KA-01, KA-02, KA-03) in combination with the Sulastic shackle (this combination works only in SA-Models) This combination matches the 3" of extension between the bolts provided by the long shackle or up to 1.5” lower at the axle’s center

Q. What is the expected lifetime of the rubber in the Sulastic shackle?

  1. As an average under normal conditions, the Sulastic lasts about 7-10 years; in severe conditions 3-5 years. However, there have been cases in which they have surpassed 10 years.

Q. Can I paint the Sulastic shackles?

  1. Yes, if it is water-based and does not contain any solvents.

Q. Do you ship internationally?

  1. Yes, if the address and recipient are accepted by the United States Postal Service

Q. Do you offer the service of shipping overnight?

  1. No.

Q. Can I install the Sulastic shackles if my vehicle was modified on the leaf spring suspension components?

  1. Most of the time yes, but Sulastic cannot guarantee the performance of the Sulastic shackles under all modified conditions. Please contact us for further details.

Q. Can I install the Sulastic shackles if my vehicle has installed airbags?

  1. Yes. If the airbags are for the intention to only level the truck and it has kept the same Leaf Spring suspension components.

AIRBAGSULASTIC

Q. Can I install the Sulastic shackles if my vehicle was lifted to 2” by using blocks between the leaf spring package and the axle?

  1. Most of the time, yes.

SULASTICLIFT

Q. Can I install the Sulastic shackles with other suspension upgrades?

  1. Most of the time they are compatible if the leaf spring suspension is kept.
*
*
*