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Old 07-21-2016, 10:20 AM   #11
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I understand airbags probably are an overall better solution to ride quality issues - but given the issues we had with component failures, I did not want to add yet another active component to a somewhat unreliable MH.
Sumo is a alternative to airbags without hassle of keeping them pumped. I have used both, I'll take Sumo's over airbags any day
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Old 07-21-2016, 05:45 PM   #12
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Recently installed the soft Sumos on top of previously installed Koni FSD shocks and Helwig sway bar. First long trip Atlanta to Oshkosh. The Sumos help, especially when moving slowly over certain types of bumps. Coach is more stable when parked without stabilizers down, obviously a side effect of Sumos having contact between chassis and rear axle.
Just got to OSH this afternoon!
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Old 07-21-2016, 06:04 PM   #13
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Hope you enjoy the week!

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Just got to OSH this afternoon!
We came back home for a couple of days, left the MH there. Will go back Saturday night. It's weird walking around there with no crowds. Nice, but weird!
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Old 07-26-2016, 08:45 PM   #14
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I just had the front and rear Sumo bump stops installed. There is a noticeable difference in suspension now. I can see why too after those tiny OE bump stops were removed. This should be on everyone's to do list. Next up is the shocks.
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Old 08-01-2016, 12:58 PM   #15
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First trip with Sumo's front and rear.

Just got back from a weekend jaunt to Algonac State Park on the St. Clair River. Its about 60 miles of rural roads each way. The Sumo's along with 72 PSI in the tires and driving the MBS 2400WS was like a dream come true. Top speed was just shy of 60 at times but the ride was smooth, cornering much better than before, and I was even able to drive single handed a good portion of the time. I can't ask for much more than that.

On an added note. The Jensen in dash navigator told us that there was no way to get there.

Note to self, when driving strictly secondary roads, change Navigator setting to "automobile"
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Old 08-01-2016, 01:11 PM   #16
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Thank you Sherman. This is great to hear. Did you change anything else, like the truts? Would you share the exact model of the springs, please. We have the MBS2400WS Forester, so same model.
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Old 08-01-2016, 04:04 PM   #17
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Thank you Sherman. This is great to hear. Did you change anything else, like the truts? Would you share the exact model of the springs, please. We have the MBS2400WS Forester, so same model.
my 2017 already had the Helwig Sway bar. The only changes I made was the air pressure adjustment and the SumoSprings SSF-106-40 for the front and the SumoSprings SSR-338-47 for the rear. There are quite a few different threads covering installation and if your at all mechanically inclined with basic hand tools and the gumption, you can install them yourself
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Old 08-01-2016, 04:51 PM   #18
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Here are what the old OEM bump stops look like. Compare them to the size of the sumo front and rear and it's a huge difference.
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Old 08-05-2016, 01:30 PM   #19
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Did I miss a thread about 72psi tire pressure ?

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Just got back from a weekend jaunt to Algonac State Park on the St. Clair River. Its about 60 miles of rural roads each way. The Sumo's along with 72 PSI in the tires... "
I'm having trouble recalling what the MB 3500 actually lists for tire pressure, but I don't believe it was nearly that high. Can you elaborate on running that tire pressure ?

Thanks !
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Old 08-05-2016, 07:11 PM   #20
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I'm having trouble recalling what the MB 3500 actually lists for tire pressure, but I don't believe it was nearly that high. Can you elaborate on running that tire pressure ?

Thanks !
Look on your door jamb and you should see a placard calling for 61 psi. I run a bit higher myself. Tires max out at 80 psi, but I don't inflate to that.
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