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x-jay vision
September 14th, 2017, 19:55
hey all, I searched and didn't find anything, but I might be retarded. I'm looking on opinions of sumosprings in the rear, looking to reduce sag pulling a small travel trailer. Anyone have them?

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x-jay vision
March 20th, 2018, 20:03
So I'm planning on using my XJ to tow a small travel trailer a few times a year so I can get back in the remote spots. I have been making a few changes to make that a more reasonable idea, one of which was adding sumosprings in the back. Really couldn't find much of anything on them, but they are essentially a progressive bumpstop that acts like an airbag under compression. They replace the rear bumpstops, so they don't limit droop. So far I've been very happy with them and the rear suspension rides very smooth over the high speed stuff. Have not towed with them yet. We will see how that goes.

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The_Punisher
March 22nd, 2018, 18:45
Sumo springs are either underrated or under utilized. I love them

I use them as bumps stops. They are extremely effective as a "poor man's" air bump.

Metal Cloak sells them for the JK as bump stops (not so much as an air bag replacement). My first experience with them was on my JK and they were fantastic when landing good and hard.

Skip to about 2:00 https://vimeo.com/102785977

https://vimeo.com/110736282

That thing needed the shocks tuned though.

x-jay vision
March 22nd, 2018, 18:52
I agree completely, not much more than extended bumpstops, and way more useful.

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The_Punisher
April 15th, 2018, 18:40
So I'm planning on using my XJ to tow a small travel trailer a few times a year so I can get back in the remote spots. I have been making a few changes to make that a more reasonable idea, one of which was adding sumosprings in the back. Really couldn't find much of anything on them, but they are essentially a progressive bumpstop that acts like an airbag under compression. They replace the rear bumpstops, so they don't limit droop. So far I've been very happy with them and the rear suspension rides very smooth over the high speed stuff. Have not towed with them yet. We will see how that goes.

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What part number did you use and how much lift do you have? They have 3 different lengths for the rear of the XJ.

x-jay vision
April 15th, 2018, 18:48
What part number did you use and how much lift do you have? They have 3 different lengths for the rear of the XJ.Well my bump stop pads are extended leaf spring plates, so they are elevated above the axle. I used the standard no lift sumo springs, I have about 4 inches of lift and the sumo springs are about 1 inch from engaging on my leaf spring plates, when sitting at normal ride height.

I did weld a custom support pillar on the bottom of the leaf spring plate to prevent the sumospring from stretching my u-bolts or bending the leaf plate. I can take pics if you want.

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The_Punisher
April 15th, 2018, 19:29
I can imagine what you mean.

Thanks for the info. I bought a 2nd XJ for the wife. It's going to be a mild wheeler for our favorite local trails as well as a "chase truck" for my go fast Jeep. She'll carry the OBA and tools. I want it to be capable of carrying a pretty good load offroad so I plan to use the sumo springs. Leafs will be a bastard pack using another set of XJ leafs I have laying around.

On my rig I actually use PN# SSF-401-47 on a custom mount that bolts into the stock location with some bracing. The bump strikes directly over the leafs on the leaf plate. It came out nice. I use the same bumps in the front too.

For the rear PN# SSR-403-40 is 1" longer than the "no-lift" ones you use. 402 is 5.25", 403 is 6.25" and 404 is 7.25" long

Heavyopp
April 15th, 2018, 19:45
Well my bump stop pads are extended leaf spring plates, so they are elevated above the axle. I used the standard no lift sumo springs, I have about 4 inches of lift and the sumo springs are about 1 inch from engaging on my leaf spring plates, when sitting at normal ride height.

I did weld a custom support pillar on the bottom of the leaf spring plate to prevent the sumospring from stretching my u-bolts or bending the leaf plate. I can take pics if you want.

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I know it's not my thread but I'd like to see what you did -- Thanks

Heavyopp
April 15th, 2018, 19:52
I can imagine what you mean.


On my rig I actually use PN# SSF-401-47 on a custom mount that bolts into the stock location with some bracing. The bump strikes directly over the leafs on the leaf plate. It came out nice. I use the same bumps in the front too.



Are you talking about the JK in the video or did you use these on a XJ -- I'd like to see pictures of your mounts too if it's not too much trouble

Thanks, Jer

x-jay vision
April 15th, 2018, 19:52
I know it's not my thread but I'd like to see what you did -- ThanksHopefully this pic helps. It's 2x2 tubing notched for the brake line, welded to the bottom of the extended spring plate. https://uploads.tapatalk-cdn.com/20180416/54053119b0ed0df3c57cfb658ffd332b.jpg

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Heavyopp
April 15th, 2018, 20:09
Thanks -- I understand what you did now

Are those the Sumo springs designed for the back of the XJ? They bolt into the stock location on the jeep?

The_Punisher
April 15th, 2018, 20:12
I want to post a pic of mine, how did you post your pic?

The_Punisher
April 15th, 2018, 20:20
http://i204.photobucket.com/albums/bb250/sleeper_07_photos/30429559_1742570692502299_121835786_n.jpg (http://s204.photobucket.com/user/sleeper_07_photos/media/30429559_1742570692502299_121835786_n.jpg.html)
http://i204.photobucket.com/albums/bb250/sleeper_07_photos/30121255_1742570689168966_220866765_n.jpg (http://s204.photobucket.com/user/sleeper_07_photos/media/30121255_1742570689168966_220866765_n.jpg.html)

The_Punisher
April 15th, 2018, 20:21
Holy crap that's all I needed to do to still use photobucket!? What the hell

Heavyopp
April 15th, 2018, 21:02
I don't see the pictures -- whats the trick?

Still get the photobucket hostage photo

The_Punisher
April 15th, 2018, 21:09
damn it! I don't for some reason. I can't believe I just did all that. I updated like 20 pics on my build thread. FML

Heavyopp
April 15th, 2018, 21:17
I have a few build threads on different websites destroyed by photobucket -- they can suck it as far as I'm concerned

I have not moved to another photo host so I can't even suggest where to go

The_Punisher
April 15th, 2018, 21:54
it's not even like they ask for a small amount of money. It's like $500 for the year or some crazy ass shit

x-jay vision
April 15th, 2018, 22:17
Thanks -- I understand what you did now

Are those the Sumo springs designed for the back of the XJ? They bolt into the stock location on the jeep?yep, these bolt in place of the factory rear bumpstops.

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