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Old 07-23-2018, 04:32 PM   #1
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Sumo Springs

I need to give everyone a heads up on my Sumo springs I had installed by a authorized shop.
Both sides has failed from the frame. I found this while cleaning my leveling jacks. It looks like to me they over tighten the bolts but the company is sending me new parts to install. And this time I will do the job when it is cooler outside. I am in Key West and heading to Miami then back to Ft Worth Tx. I will pick up some bolts for now to put them back in place. I did feel the ride change and blew it off. Click image for larger version

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This is what I get for not checking them more.
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Old 07-23-2018, 04:58 PM   #2
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so no part of the sumo spring itself failed, just the bolts that hold it on ? I have recently installed sumo springs myself. I have the bump stop type, one bolt.
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Old 07-23-2018, 05:02 PM   #3
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Have them on the front.
But it looks like the bolts were to tight
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Old 07-23-2018, 07:38 PM   #4
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Quote:
Originally Posted by Johndale View Post
Have them on the front.
But it looks like the bolts were to tight

yeah, the front you screw in hand tight. the rear they just say snug but not to tight or it can bend the bracket. did the bolts snap in a way that now you have to drill or easy out, that wouldn't be fun.
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Old 07-23-2018, 08:48 PM   #5
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Happy with the upgrade in ride you got with the sumo springs otherwise though?
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Old 07-23-2018, 09:02 PM   #6
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I'm not the OP but I can feel the difference on my 31' class c with sumo front & rear. Although I still ordered Hellwig sway bars front & rear & roadmaster steering stabilizer, that I haven't installed yet.
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Old 07-24-2018, 05:08 PM   #7
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I loved the ride with the sumo springs. The bolts heads sheared off and on some of the holes I need to knock the other part out.
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Old 07-25-2018, 07:43 PM   #8
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I thought they were bump stops. Are they really springs, do they replace your leaf or coil springs?
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Old 07-26-2018, 05:35 AM   #9
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I loved the ride with the sumo springs. The bolts heads sheared off and on some of the holes I need to knock the other part out.

My factory installed rear SS TOP mount fasteners had a similar issue. Tiffin said SS initially supplied them with underrated grade bolts. I had Tiffin warranty both F & R replacement of the SS.

Do use grade 8 fasteners torque to 40 ft lbs with blue or Red Loctite. Also if 3 bracket holes have not been drilled do so. For extra security you could double nut the fasteners.
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Old 07-26-2018, 05:56 AM   #10
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Originally Posted by Harrysait View Post
I thought they were bump stops. Are they really springs, do they replace your leaf or coil springs?
They replace the bump stops and are a supplement to your springs. They improved the curve handling of my truck and reduced sag by one inch.
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Old 07-26-2018, 06:12 AM   #11
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My new parts is waiting for me at home. Drilling the extra hole is a good idea. Thanks.
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Old 08-08-2018, 02:57 PM   #12
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Well got back home new hardware waiting for me and went to install new bolts and tell me if you see a problem here.
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The great news they are sending me a new kit. But this time I am installing it.
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Old 08-09-2018, 04:29 AM   #13
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Definite problem with the oval bolt holes and bent bracket's. I requested Tiffin to send me new F & R kits when I had my issues.

What is the condition of the frame rail bolt holes ?
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Old 08-09-2018, 09:04 AM   #14
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Way too weak of a bracket. I have a welder so I would do it myself but that bracket needs gussets from the top to the flanges on both sides.

IMO that looks like a cheep POS I would not install it in "as shipped" form.
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