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Old 12-31-2021, 01:15 PM   #1
Tonyf
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Default SN Shocks

Hello again, it appears that Road King is out of business and the shocks for the Supernova's no longer available. Monroe and Gaberial both have shocks for the SN, anyone have experience with these? or can recommend some other brand for the SN? Thanks.
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Old 01-20-2022, 11:41 AM   #2
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You can still get road kings directly thru king shocks. They are just 2.5" or 3" king emulsion shocks, and they have the valving spec on hand if you call them.

--Jeff
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Old 01-20-2022, 05:43 PM   #3
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You can still get road kings directly thru king shocks. They are just 2.5" or 3" king emulsion shocks, and they have the valving spec on hand if you call them.

--Jeff
Perfect, thanks. Will call them once I’m ready to do the shocks, my coach already has Monroe shocks upfront, but nothing in the back.

I added the Timbren rear suspension enhancers, part number RES001 for future reference . They are mainly rubber springs. Had to raise the MH so the suspension hung free, remove the stock bump stops, drill four holes on each side and install the Timbrems. Back end raised ~1.25 inches, haven’t drove it yet with the Trimbrens but will soon. They have a 8600 lb load capacity. Did not want air bags, such as airlift, as it’s more to break and fool with. Also was not spending all that cash for an aftermarket air ride retrofit.

Still gathering parts to add the shocks, should have everything next month.
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Old 01-21-2022, 10:32 AM   #4
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Perfect, thanks. Will call them once I’m ready to do the shocks, my coach already has Monroe shocks upfront, but nothing in the back.

I added the Timbren rear suspension enhancers, part number RES001 for future reference . They are mainly rubber springs. Had to raise the MH so the suspension hung free, remove the stock bump stops, drill four holes on each side and install the Timbrems. Back end raised ~1.25 inches, haven’t drove it yet with the Trimbrens but will soon. They have a 8600 lb load capacity. Did not want air bags, such as airlift, as it’s more to break and fool with. Also was not spending all that cash for an aftermarket air ride retrofit.

Still gathering parts to add the shocks, should have everything next month.
Im curious how you like the Timbrens, report back when you drive it. Mine has rubber cushioned shackle hangers so the ride is great, but I need to lift the rear a touch when Im towing heavy. I havent had great luck with Timbrens on my trucks, and did air bags on my last Super C. This one is already way better than the Kodiak chassis was, so I contemplating replacing those IH bump stops with Sumo Springs version of the timbren.

When you talk to King, they should offer both a 2.5" version and a 3" diameter version (at one time they did). The 3" version is pricey, but definitely adds control. We run Kings on our race trucks, and it is amazing how much more control the larger piston gives us (one of the trucks had 4" diameter King Kong 5 tube bypasses...they are amazing).

Having said that, I have the 2.5" version on my supernova and they work great too.

--Jeff
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Old 02-14-2022, 11:45 AM   #5
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Im curious how you like the Timbrens, report back when you drive it. Mine has rubber cushioned shackle hangers so the ride is great, but I need to lift the rear a touch when Im towing heavy. I havent had great luck with Timbrens on my trucks, and did air bags on my last Super C. This one is already way better than the Kodiak chassis was, so I contemplating replacing those IH bump stops with Sumo Springs version of the timbren….
Jeff you are talking about the Sulastic shackles I assume. Been looking at them but can’t find a lot of info with the exception of theirs. https://www.sulastic.com/en/

The ride with the Trimbrens improved some, a little less jarring. But still nothing to write home about. I’m the process of working thru shocks now, going with the standard replacement Monroe’s for the moment. I’m working thru it in stages, if I still don’t like the ride after the shocks, will look at the Sulastics maybe even circle back around to the Roadkings.
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Old 02-22-2022, 02:20 PM   #6
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Jeff you are talking about the Sulastic shackles I assume. Been looking at them but can’t find a lot of info with the exception of theirs. https://www.sulastic.com/en/

The ride with the Trimbrens improved some, a little less jarring. But still nothing to write home about. I’m the process of working thru shocks now, going with the standard replacement Monroe’s for the moment. I’m working thru it in stages, if I still don’t like the ride after the shocks, will look at the Sulastics maybe even circle back around to the Roadkings.
No, they are not the sulastic or aerospace velvet ride's. I have used those on other trucks, they work pretty good for removing the small expansion joint type bumps. Those are a rubber torsion bushing inside a 2 piece shackle setup.

My setup, the full shackle assy is mounted to rubber shear blocks. I will take some pics.

Also, here is the new website to the road kings. King is marketing them as a different shock now, under hdshocks.

https://www.hdshocks.com/

--Jeff
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Old 08-24-2022, 03:27 AM   #7
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Originally Posted by pwerwagn View Post
Im curious how you like the Timbrens, report back when you drive it. Mine has rubber cushioned shackle hangers so the ride is great, but I need to lift the rear a touch when Im towing heavy. I havent had great luck with Timbrens on my trucks, and did air bags on my last Super C. This one is already way better than the Kodiak chassis was, so I contemplating replacing those IH bump stops with Sumo Springs version of the timbren.

When you talk to King, they should offer both a 2.5" version and a 3" diameter version (at one time they did). The 3" version is pricey, but definitely adds control. We run Kings on our race trucks, and it is amazing how much more control the larger piston gives us (one of the trucks had 4" diameter King Kong 5 tube bypasses...they are amazing).

Having said that, I have the 2.5" version on my supernova and they work great too.

--Jeff
Hi Jeff

Any chance you've had the time to take a pic or maybe even glean a part number off of your cushioned shackle hangers?

I just picked up a 2008 SN 6372 as well, and while I've only really driven it empty, it is seriously jarring in the rear over small sharp bumps and ridges. Those sound like the affordable ticket by the sounds of your ride. Not much interest in shelling out for an air suspension here either.

Is it something like this?:

https://www.morryde.com/products/rs-...on-system-kit/

Thanks
Brad
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Old 08-25-2022, 04:20 PM   #8
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Hi Jeff

Any chance you've had the time to take a pic or maybe even glean a part number off of your cushioned shackle hangers?

I just picked up a 2008 SN 6372 as well, and while I've only really driven it empty, it is seriously jarring in the rear over small sharp bumps and ridges. Those sound like the affordable ticket by the sounds of your ride. Not much interest in shelling out for an air suspension here either.

Is it something like this?:

https://www.morryde.com/products/rs-...on-system-kit/

Thanks
Brad
Yup! That looks pretty much like what mine has on it! Looks a bit different, but same theory. Mine rides really good in my opinion, even before it had shocks on the rear.
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Old 03-15-2022, 11:11 AM   #9
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New Timbren BDR750A rubber springs arrived and installed. It raised the MH about 1.5 inches in the back. Once the springs fully seat and wear in, it will probably be close to an inch. The OEM rubber springs are lifted up about 1/4 inch about their seat. Haven't driven it yet, been working on other stuff, but time will tell. The BRD750A fits the International chassis not the BDR750, the A has a little longer ears to bolt up to the OEM rubber springs.
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Old 03-24-2022, 02:43 PM   #10
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Good info Tony! Are those timbrens the Oval shaped ones?

It sure looks like you could easily mod those timbren brackets to fit airbags at a later date if you wanted.

--Jeff
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Old 03-25-2022, 07:31 AM   #11
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Good info Tony! Are those timbrens the Oval shaped ones?

It sure looks like you could easily mod those timbren brackets to fit airbags at a later date if you wanted.

--Jeff
Yes sorta, they more rectangular than oval. Probably not enough height for airbags, but you never know.
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Old 08-22-2022, 09:17 AM   #12
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Been meaning to post an update for a while. After adding the rubber springs, the ride was a little less controlled and a little bouncy, not jarring like it was, but still warranted some attention. Last spring, I added stock rear shocks, and a rear Roadmaster sway bar. Got the shock brackets from Findit parts and eBay, shocks from Amazon, and the sway bar from E-trailer. it took weeks to track all this stuff down, good thing some of the parts are interchangeable with the 4300 series.

1- NAVISTAR 3601127C1 - INTERNATIONAL SUPPORT SHK ABSBR
1- LH LOWER SHOCK ABSORBER BRACKET FORD / INTERNTIONAL TRUCK 19AL1-AZ (not positive of this part number)
2- NAVISTAR 473289C1 - INTERNATIONAL BRACKET SHOCK ABS
2 - Monroe Shocks & Struts Magnum 66924 Shock Absorber
1- Antisway Bar RM-1179-110-00

I had trouble finding the lower shock mounting stud, finally just used an aftermarket one and cut the metal spacer down a little on the shock to fit. Plan on replacing the Monroe stocks with King shocks this spring, will revisit it then.

Note a spacer will need to be made to mount both the shock brackets and sway bar mounts under the axle. Its visible in some of the pictures. The u-bolts are just long enough to allow it to work. The rear most sway bar backets came to exactly the same points on the frame as the rear leveling jacks, it was a little tight getting the bolts etc in there.
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File Type: jpg IMG_6785 r.JPG (222.4 KB, 12 views)
File Type: jpg IMG_6778 r.JPG (248.5 KB, 13 views)
File Type: jpg IMG_6780r.JPG (246.5 KB, 11 views)
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Old 08-28-2022, 10:46 AM   #13
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Hi Tonyf. Have you been out enough to get a sense if the Sway Bar actually helps? My 6400 rocks like crazy in the wind and I've even stopped driving because it just flat wore me out. I see this sway bar on the eTrailer site and if it works, I'm in... Let us know, thanks.
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Old 08-28-2022, 11:20 AM   #14
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Hi Tonyf. Have you been out enough to get a sense if the Sway Bar actually helps? My 6400 rocks like crazy in the wind and I've even stopped driving because it just flat wore me out. I see this sway bar on the eTrailer site and if it works, I'm in... Let us know, thanks.
I know how you feel. I drove it 40 miles or so to the International dealer during high winds to have the brakes fixed when I first bought it and it was white knuckles all the way.

Before I added the Timbrens, it would rock some in crosswinds and ride rough, not to mention being pushed around by crosswinds. I really didn't drive it a lot before making the changes. I knew generally from racing and past experience what had to be done to it to improve the suspension and after that trip to the dealer I just moved forward with it. There is no one fix to correct everything; all aspects need to be addressed (read costly). The bar seems to help, especially with the slightly softer suspension. All of my testing and driving was done with empty water and holding tanks.

I'm hoping the steering stabilizer will help with the wandering during crosswinds. After that, I'm done with the suspension.

Next step is to address the towing, I'm not sure I can even get it out of my driveway with the race trailer attached. Hopefully I won't have to revisit the suspension.

You might need both front and rear bars, best suggestion would be to call RoadMaster. I did watch some before and after videos they had available, big difference, but they were Class A.
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Old 04-23-2023, 07:22 AM   #15
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Hello,

Im getting ready to replace my front shocks with hg king and add safe t and a front sway bar. The front sway bar says to remove the front leaf axle eye bolt. Do i need to jack up the truck front end? Never done this before i want to make sure i dont come accross any issues. How did you install yours. Also, the roadmaster says to use a different bracket size on the passenger side. Which is slightly different from the driver side bracket that attqches to the eye bolt leaf spring. Any tips or pictures of your install appreciated. Thank you
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Old 04-24-2023, 08:04 AM   #16
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Hello,

Im getting ready to replace my front shocks with hg king and add safe t and a front sway bar. The front sway bar says to remove the front leaf axle eye bolt. Do i need to jack up the truck front end? Never done this before i want to make sure i dont come accross any issues. How did you install yours. Also, the roadmaster says to use a different bracket size on the passenger side. Which is slightly different from the driver side bracket that attqches to the eye bolt leaf spring. Any tips or pictures of your install appreciated. Thank you

Mine was the rear anti-sway bar, which is different, but if you are removing the leaf spring eye bolts, then yes it will have to be jacked up and properly supported. Bolts will probably not come out until the weight is off them. I would contact Roadmaster direct if there are any questions, and perhaps take it to a properly equipped shop.
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Old 10-22-2022, 09:06 PM   #17
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Wow, thanks for the detailed pictures. I really appreciate it. Seems like quite the bit of engineering went into that setup. I can see that it would work like you mentioned.

I wonder who made it, and if they still do? My google-fu skills are usually strong, but I've found nothing online in the way of any clues.

Thanks again, Powerwagon!
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Old 10-23-2022, 10:23 AM   #18
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Wow, thanks for the detailed pictures. I really appreciate it. Seems like quite the bit of engineering went into that setup. I can see that it would work like you mentioned.

I wonder who made it, and if they still do? My google-fu skills are usually strong, but I've found nothing online in the way of any clues.

Thanks again, Powerwagon!
I’ll try to remember to look for the brochure today. It does work very well, I have zero complaints about the ride. It handles heavy tongue weight just fine as well
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Old 04-24-2023, 01:06 PM   #19
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I am having trouble installing the safe t bracket g002k3. It seems it's at the same height of my tie rod won't go over. Maybe I'm missing something. I'll have to re measure and send pictures. I've seen posts where they used a different mounting bracket that has a lip to go over the tie rod for mounting.
We're you able to use the g-002k3 bracket or a different one?

Thank you
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Old 04-25-2023, 05:57 AM   #20
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I called safe t. Looks like the mounting kit they sent was incorrect. The correct one for international 4200 2008 at least for my set up is s-124k3. If this is helpful for anyone else on here.
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