Sulastic Rubber Springs, Greatly Improving the Ride of Trucks

Install review by H. Kent Sundling, edited from PowerStrokeOnline.com

Like a torsion trailer axle or Hendrickson suspension on a semi-truck, Sulastic Rubber Springs are a cast hinge embedded with rubber. They do settle the empty ride down considerably. I have a clothes rod attached to the hanger hooks in my SuperCab which usually bounces down without clothes on it when my F250 is empty. After adding Sulastic, the clothes rod stays put. The F250 vibrates less. Sulastic puts tension control on your leaf spring, taking some of the impact out of the spring action. They are made of vulcanized steel and compound rubber which take the vibration out of your trucks suspension for you and to increase the life span of your trucks suspension (leafs, shocks and brakes.) See video below

Very simple installation. The hardest part was getting the old bolts out of the hanger. You need to save your old bolts and nuts as they aren’t supplied with the kit.  Jack the truck up by the frame, remove the rear leaf spring shackle from the hanger and leaf spring. Insert the rubber bushings and separation tube into the Sulastic casting and bolt to the truck frame hanger. The Sulastic straps bolt to the factory leaf springs. The casting has a stop in built for empty position. Warranty one year.

The original shackle hanger moves for and aft as the leaf spring flattens out under load Hardest part of the install is getting the old shackle bolts out Factory shackle and Sulastic torsion shackle Sulastic installed and a smooth ride
Sulastic Rubber Springs has engineered a proven product that virtually eliminates excessive vehicle vibrations.  In comprehensive laboratory and field tests, vehicles using Sulastic Rubber Springs obtained the following results:

  • Reduction in vehicle vibrations by 60% to 80%, while significantly reducing excessive tire temperature caused by excessive vibrations
  • Increase in vehicle stability by 20% to 30% increasing the angle for turn-over by 4 to 6 degrees
  • Reduction in braking distances by 10% to 20%, keeping all 4 tires on the road during braking
  • Increase in Driver Control by stabilizing vehicle weight over all 4 tires

Application Chart, Fit your Truck, Click

 Over 6,000 vehicles are using Sulastic Rubber Springs today!   Free Shipping

 Order below  $368 for a pair, except where noted  one year warranty

Shipping to Canada $41 click

FORD                  Free Shipping
TRUCK SPECS YEAR PART #
 BRONCO FULL SIZE  1978-1996  SA-05  order
 E-150  1996-2007  SA-01  order
 E-150 (2008-2013)  2008-2013 SA-01E order
 E-250 1992-2010  SA-05  order
 E-350  1992-2013  SA-06  order
 EXCURSION  2000-2005  SA06-CH  order
 EXPEDITION  1997-2002  SA-02  order
 EXPLORER  1997-2002  SE-01  order $392
 EXPLORER-SPORT-TRACK  2001-2005  SE-01  order $392
 F-100  1980-1983  SA-01  order
 F-150 (1980-2003)  1980-2003  SA-01  order
 F-150 (2004-2007) 2004-2007  SA-05  order
 F-150 (2008-2011) 2008-2011  SA-05W  order
 F-250 (1980-2013)  1980-2013  SA-06  order
 F-350 (1980-2001)  1980-2011  SA-06HD  order
 RANGER  1983-2011  SA-05  order
DODGE             Free Shipping
TRUCK SPECS YEAR PART #
 CARAVAN  Spare tire outside  2000-2007  SE-03  order $392
 DAKOTA (2005-2011)  2005-2011  SA-04  order
 DURANGO  1998-2004  SC-03  order
 RAM 1500  2002-2008  SC-03  order
 RAM 1500 (1994-2001)  1994-2001  SA-07  order
 RAM 1500 (2002-2008)  2002-2008  SC-03  order
 RAM 2500 2002-2011  SC-07  order
 RAM 2500 HD TURBO DIESEL 4X4  2003-2013  SC-07HD  order
 RAM 2500 (1994-2002)  1994-2002  SA-07  order
 RAM 2500 HD TURBO DIESEL 4X2  2003-2013  SA-07  order
 RAM 3500 (1994-2002)  1994-2002  SA-07HD  order
 RAM 3500 HD TURBO DIESEL 4X2 2003-2013  SA-07HD  order
 RAM 3500 HD TURBO DIESEL 4X4 2003-2013  SC-07HD  order
 RAM VAN 1500 1980-2003  SE-10  order
 RAM VAN 2500  1980-2003  SE-10  order
 RAM VAN 3500  1980-2003  SE-10  order
NISSAN            Free Shipping
TRUCK SPECS YEAR PART #
 FRONTIER 98-2003  1998-2003  SC-01  order
 PICK-UP  1980-1997  SC-01  order
 TITAN  2005-2013  SA-01-TI  order
 XTERRA  2000-2005  SC-04  order
TOYOTA         Free Shipping
TRUCK SPECS YEAR PART #
 PICK UP (1980-1994)  1980-1994  SC-02  order
 TACOMA (1995-2004)  1995-2004  SC-12  order
 TACOMA (2007-2012)  2007-2012  SA-08  order
 TUNDRA (2000-2006)  2000-2006  SA-01  order
 TUNDRA ( 2007-2013)  2007-2013  SA-01 TU  order  $530
CHYSLER         Free Shipping
TRUCK SPECS YEAR PART #
 TOWN COUNTRY  2000-2007  SE-03  order $392
HUMMER         Free Shipping
TRUCK SPECS YEAR PART #
 HUMMER H3  2006-2010  SE-06  order $392
CHEVROLET         Free Shipping
TRUCK SPECS YEAR PART #
 BLAZER FULL SIZE K5 1969-1991  SA-01  order
 CHEYENNE C/K  1980-1988  SA-01  order
 CHEVROLET 454 SS 1990-1991  SA-01  order
 CHEVROLET 1500 WT C/K 1990-1991  SA-01  order
 COLORADO  2004-2013  SE-06  order $392
 CUSTOM DELUXE C/K  1980  SA-01  order
 EXPRESSVAN 1500  1996-2013  SA-10  order
 EXPRESSVAN 2500  1996-2013  SA-10  order
 EXPRESSVAN 3500  1996-2013  SA-10  order
 EXPRESSVAN CARGO 1500  1996-2010  SA-10  order
 EXPRESSVAN CARGO 2500  1996-2013  SA-10  order
 EXPRESSVAN CARGO 3500  1996-2013  SA-10  order
 EXPRESSVAN CUTAWAY 1500  1996-2013  SA-10  order
 EXPRESSVAN CUTAWAY 3500  1996-2013  SA-10  order
 S10 PICK UP  1982-2004  SE-02  order $392
 S10 BLAZER  1982-2004  SE-02  order $392
 SCOTTSDALE C/K  1980-1987  SA-01  order
 SILVERADO 1500  1988-2013   SA-04  order
 SILVERADO 2500 1988-2013  SA-04HD  order
 SILVERADO 2500HD 1999-2010   SA-04HD  order
 SILVERADO 2500HD 2011-2013 SA-06  order $368KA-03 lowering kit $64
 SILVERADO 3500 1980-2010   SA-04HD  order
 SILVERADO 3500HD 1999-2010  SA-04HDD  order
 SILVERADO 3500HD 2011-2013  SA-06HD  order
 SILVERADO C/K  1980-1987  SA-01  order
 SPORTSIDE SPORT 1980-1993  SA-01  order
SUBURBAN 1980-1991  SA-04  order
 SUBURBAN 2500 1992-2010  SA-01-TI  order
 SUBURBAN 1500  1992-2001  SA-04  order
 TAHOE  1992-2002  SA-01  order
GMC                Free Shipping
TRUCK SPECS YEAR PART #
 CANYON  2004-2013  SE-06  order $392
 HIGH SIERRA  1980-1981  SA-04  order
 S-15 JIMMY  1984-2001  SE-02  order $392
 S-15 PICK-UP  1983-2004  SE-02  order $392
 SAVANA 1500  2003-2013  SA-10  order
 SAVANA 2500  2003-2013  SA-10  order
 SAVANA 3500  2003-2013  SA-10  order
 SAVANA CUTAWAY 1500  2003-2013  SA-10  order
 SAVANA CUTAWAY 2500  2003-2013  SA-10  order
 SAVANA CUTAWAY 3500  2003-2013  SA-10  order
 SIERRA  1980  SA-04  order
 SIERRA 1500  1988-2013  SA-04  order
 SIERRA 2500 1988-2010   SA-04HD  order
 SIERRA 2500 HD  1999-2010   SA-04HD  order
 SIERRA 2500HD 2011-2013 SA-06  order $368KA-03 lowering kit $64
 SIERRA 3500 1980-2010   SA-04HD  order
 SIERRA 3500 HD 1999-2010  SA-04HDD  order
 SIERRA 3500HD 2011-2013  SA-06HD  order
 SIERRA CLASSIC  1980-1988  SA-04  order
 SIERRA GRANDE  1980-1988  SA-04  order
 SPECIAL  1990-1991  SA-04  order
 SUBURBAN  1980-1991  SA-04  order
 SUBURBAN 1500  1992-2001  SA-04  order
 SUBURBAN 2500  1992-2010   SA-04HD  order
 YUKON  1992-2002  SA-01  order
 YUKON DENALI  1992-2002  SA-01  order
 YUKON DENALI XL  1992-2002   SA-04HD  order
 YUKON XL  1992-2002   SA-04HD  order

The airless bag to prevent your sag and improve your ride! For trucks with campers, trailers, commercial bodies and all other loads..

SumoSprings (the world’s first and only “airless airbag” suspension system for trucks and vans) are manufactured from an advanced high grade, closed cell polyurethane foam; ideal for the tough truck underbody environment. The product underwent testing in extreme conditions ranging from blistering US desert summer days to the frigid Canadian winter nights. Combining heavy loads with extreme terrain and temperature conditions over eighteen months of testing ensures their performance in any similar conditions our customers might encounter. More…

Tacoma
See the Sulastic performance on streets

testimonials Diesel Place


4-06-2008, 12:09 PM  §

#58

04-08-2008, 02:20 PM  §

#61

B123ZMANABDiesel FanaticJoin Date: Feb 2005Posts: 121iTrader: (0) I have them with the 4″ deavers and they work great. makes the rear end feel wayyy better than stock. I have airbags as well and keep no air in them. I would recommend them to all. well worth the money
Old04-29-2008, 08:45 AM  §

#78

HotRodSSDiesel Head
HotRodSS's AvatarJoin Date: Jul 2006Location: TennesseePosts: 47iTrader: (0) HotRodSS’s Garage TN Diesel Place Club Member
I have had the Sulastic springs installed for a while now and I was very pleased with the ride improvement. One way I could descibe it is that the rear suspension is similiar to the front now when going over bumps. It is much smoother as opposed to the harsh jar that was there before. They are made much heavier than the stock shackles also. I would recommend them if you are looking for a smoother more “car-like” ride from your pickup. Thanks to Nick for a great product.
Old08-31-2008, 03:30 PM  §

#117

rhyanmeadeDiesel EnthusiastJoin Date: Jul 2005Location: Elko, NevadaPosts: 7iTrader: (0) I put a set of the Sulastic shackles on this weekend. Took me about 3 hrs by the time you drop the hitch, then the top “superior” shackle bolts didn’t want to come out. I’ve had the dreaded 45-50mph hop ever since I bought the truck, and these shackles to seem to help alot. Most of the vibration is gone, and the ride is definately smoother. I’ll let the wife drive it for a couple of days to see if she can tell the difference. Well worth the money so far.
Old08-31-2008, 08:51 PM  §

#119

floriduramax1Diesel Fanatic
floriduramax1's AvatarJoin Date: Oct 2006Location: Deltona,FLPosts: 1,667iTrader: (0) floriduramax1′s Garage The Florida Diesel Truck Club Member
Just put mine in today!!! What a difference! LOVE EM! I went riding around looking for bumps! My passenger seat doesn’t shake VIOLENTLY anymore……LOVE EM!
Old09-19-2008, 08:37 PM  §

#141

JD4440 Lead Moderator Do you ever think…….?
JD4440's AvatarJoin Date: Jul 2006Location: Orlinda,TennesseePosts: 4,332iTrader: (0) JD4440′s Garage Send a message via AIM to JD4440 TN Diesel Place Club Member KY Diesel place Club Member
Mine came today !! I’ll say that is the fastest I’ve ever recieved anything from Cali (3 days). Got mine with the 2″ drop; hopefully get them installed sunday and be able to report back. Thanks Nick !
Old09-21-2008, 08:19 AM  §

#142

JD4440 Lead Moderator Do you ever think…….?
JD4440's AvatarJoin Date: Jul 2006Location: Orlinda,TennesseePosts: 4,332iTrader: (0) JD4440′s Garage Send a message via AIM to JD4440 TN Diesel Place Club Member KY Diesel place Club Member
Installed yesterday. Took all of a few hours (uncommon problems) For some reason when you take loose my right shackle the spring moves against the frame? Other than that and the bolts that wont go between the rivet and bed all was good. The 2″ drop pieces were a little snug but ended up working well.Now for the good stuff. Took them to the roughest road near the shop, took it as fast as I had the nerve to and WOW! is all I can say. If they don’t do much more they really keep the tail in line when going around a rough curve. Smoothed out potholes considerably and overallgreatly improved the feeling of patchwork in the road. A+ and a big thumbs up for a great product Nick !

testimonial Marble Junkie


MarblejunkieDiesel Fanatic
Marblejunkie's AvatarJoin Date: May 2007Location: Riverbank, CAPosts: 70iTrader: (0) Marblejunkie’s Garage
Smoother Ride


Well here it is in her own words quote: “The aftershocks are gone and my body don’t jiggle no more! The ride is 50% better than what it was, it’s not my old Suburban, but we’ll keep the truck” ,unquote. The receiver hitch had to be lowered to remove the shackle bolts, and the torsion bars were adjusted up 1/4″. The front is +1″ higher and the rear is +5/8″ higher. At the suggestion of the installation tech I changed the tire air pressure while riding empty in the front from 55# to 65# and in the rear from 65# to 55#. The engine is where all the weight is and the bed is empty, it was visible in the tire sidewalls as he pointed out to me. Back up to 80# when towing. I drove the truck and was quite surprised at the big difference, especially after reading on the forum about all the big bucks spent on shocks and other suspension type items. I was skeptical to say the least, but now I am sold! Here is a link to the installation pics, read the inital comment for more information when you get there. Monty

http://www.esnips.com/web/SulasticRubberSpring

MarblejunkieDiesel Fanatic
Marblejunkie's AvatarJoin Date: May 2007Location: Riverbank, CAPosts: 70iTrader: (0) Marblejunkie’s Garage
One Week Later


Update:
The springs are doing what they claim to do. I pumped up the air in my tires front and back (80#)to tow my TT home after some dealer warranty work. The trip was about 30 miles and I as presumed, the ride was fine because of the heavy tongue weight. What I did notice was after unhitching and going for a ride to grocery shop was that the additional air in the tires made the ride considerably rougher. So the best pressure for us to obtain a smooth ride is 65#F and 55#R. These springs are fine if you run empty most of the time, they would be less valuable if towing or carrying a load most of the time. Overall the DW is happy with the ride, and that is what this was all about in the first place.

Marblejunkie's AvatarJoin Date: May 2007Location: Riverbank, CAPosts: 70iTrader: (0) Marblejunkie’s Garage Quote:

Originally Posted by johnmay19;1980853; Everything still working out with the springs?

Everything is still right on, not one problem or disappointment! We took a 300 mile trip on the 19th, 80% freeway driving at 70mph, the rest on meandering mountain roads and without provoking her the DW blurted out about how much she was liking the truck now since the ride was so smooth. Music to my ears! Tire pressures make a difference, as mentioned earlier I am running 65psi F and 55psi R when empty. Mileage on this trip (no towing) was 18.65 mpg. I would not hesitate to do it all over again, it has been worth it.

Old12-28-2007, 03:24 PM  §

#33

MarblejunkieDiesel Fanatic
Marblejunkie's AvatarJoin Date: May 2007Location: Riverbank, CAPosts: 70iTrader: (0) Marblejunkie’s Garage
Quote:

Originally Posted by RayMich View Post Other than tire pressure, are the Sulastic spring shackles the only changes you have made? are you still running the stock shocks? Stock tires?

Tires and shocks still stock. No other changes, have about 7,000 miles now. It was a wise move for my situation. I did not need to upgrade the shocks to smooth out the ride and when the little lady is happy, I am happy!

Old02-03-2008, 09:32 PM  §

#36

MarblejunkieDiesel Fanatic
Marblejunkie's AvatarJoin Date: May 2007Location: Riverbank, CAPosts: 70iTrader: (0) Marblejunkie’s Garage
What type of update are you seeking? Price, quality, performance, satisfaction?I know there are a few others who have made the plunge so to speak, but I am still very happy the Sulastics are on our truck. The price was worth it for the results obtained.I have not heard from anyone who has the springs, complain about them not doing what they were designed to do. I feel like it would have been a mistake to go the shocks route, since they only make the ride stiffer instead of softer, especially in normal everyday driving conditions.If you are looking for a more cushioned ride to the rear end, I don’t think you can make a better choice other than loading a few hundred pounds of sandbags or maybe a water bladder in the bed of your truck.Good luck and let us know if you make the leap
Old12-28-2007, 03:24 PM  §

#33

MarblejunkieDiesel Fanatic
Marblejunkie's AvatarJoin Date: May 2007Location: Riverbank, CAPosts: 70iTrader: (0) Marblejunkie’s Garage
Quote:

Originally Posted by RayMich View Post Other than tire pressure, are the Sulastic spring shackles the only changes you have made? are you still running the stock shocks? Stock tires?

Tires and shocks still stock. No other changes, have about 7,000 miles now. It was a wise move for my situation. I did not need to upgrade the shocks to smooth out the ride and when the little lady is happy, I am happy