Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > General Discussions about our Montanas
Click Here to Login

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-24-2021, 09:47 PM   #1
als049
New Member
 
Join Date: Jan 2021
Location: Shreveport
Posts: 6
M.O.C. #27910
Sumo Springs for fifth wheels

Has anyone used these devices on their Montanas to upgrade/improve the suspension?
 
als049 is offline   Reply With Quote
Old 03-25-2021, 08:38 AM   #2
rames14
Montana Master
 
rames14's Avatar
 
Join Date: Aug 2004
Location: Livermore
Posts: 5,097
M.O.C. #1920
The most popular upgrade is IS by MorRyde. It is so popular that they are about a year out right now on install time in Elkhart. We have our appointment in September.
__________________
Ron and Terrie Ames - MOC #1920/KF0NTA
2021Montana 3230CK Super Solar Legacy Package
2021 Ram 3500 Laramie Longhorn, BIM Charging
4x4, SRW, LB, Crew Cab, Pullrite 3900 Hitch
rames14 is offline   Reply With Quote
Old 03-25-2021, 08:57 AM   #3
azwiz
Seasoned Camper
 
Join Date: Dec 2018
Location: Hereford,AZ
Posts: 93
M.O.C. #23139
ya, @ about $6000.00!
__________________
2018 Ram 3500 Laramie Longhorn DRW, Aisin, 4:10, B&W 3600 Companion
2019 3121RL Montana 20th Anniversary Edition
Did you ever stop to think, and forgot to start again?
azwiz is offline   Reply With Quote
Old 03-25-2021, 09:47 AM   #4
R.S.O'Donnell
Montana Master
 
Join Date: Feb 2020
Location: USA
Posts: 582
M.O.C. #25842
Quote:
Originally Posted by als049 View Post
Has anyone used these devices on their Montanas to upgrade/improve the suspension?
I would be very careful about using something like it. There were instances where people were getting frame cracks on Sprinters using airbags. And of course MB was not covering the damage.
R.S.O'Donnell is offline   Reply With Quote
Old 03-25-2021, 06:12 PM   #5
als049
New Member
 
Join Date: Jan 2021
Location: Shreveport
Posts: 6
M.O.C. #27910
Thanks to all for the reply. Yes that’s why I was looking at alternatives. I was quoted $7000 and a long wait. I was also told by a Montana regional rep that the
IS system potentially could cause warranty issues. So I was looking at other alternatives-that might be warranty “safe”.
als049 is offline   Reply With Quote
Old 03-25-2021, 07:15 PM   #6
mhs4771
Montana Master
 
mhs4771's Avatar
 
Join Date: Dec 2009
Location: Sebring
Posts: 3,633
M.O.C. #9969
I don't think there is anything that is "Warranty Safe", seems just about all MFRs can find some reason to reject a warranty claim if they don't want to pay.
__________________
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
mhs4771 is offline   Reply With Quote
Old 03-26-2021, 08:53 AM   #7
azwiz
Seasoned Camper
 
Join Date: Dec 2018
Location: Hereford,AZ
Posts: 93
M.O.C. #23139
Quote:
Originally Posted by mhs4771 View Post
I don't think there is anything that is "Warranty Safe", seems just about all MFRs can find some reason to reject a warranty claim if they don't want to pay.
X2 Didn't realize they went up in price! Sumo springs looks to be the least intrusive. Could take them out (fast) if there was a warranty issue.
__________________
2018 Ram 3500 Laramie Longhorn DRW, Aisin, 4:10, B&W 3600 Companion
2019 3121RL Montana 20th Anniversary Edition
Did you ever stop to think, and forgot to start again?
azwiz is offline   Reply With Quote
Old 03-26-2021, 10:49 AM   #8
Cbrez
Seasoned Camper
 
Cbrez's Avatar
 
Join Date: Mar 2021
Location: Virginia Beach
Posts: 79
M.O.C. #28306
We had them installed when we had a suspension failure on the road. Insurance covered the cost of everything except the Sumo springs since they were considered an upgrade. The four Sumo springs cost us $910 installed.

The OEM springs we replaced all had recurve in them where the axles attached. The Sumo springs act as a shock absorber and give me piece of mind that it wonít happen again. After breaking down on the road I definitely inspect my suspension more than I used to.
Attached Thumbnails
Click image for larger version

Name:	92EF4942-D582-4C37-B7AA-2FBE6E74F7F1.jpg
Views:	143
Size:	173.4 KB
ID:	8741   Click image for larger version

Name:	6E798421-19C5-4699-8F66-3F35D82EDAB3.jpg
Views:	80
Size:	238.2 KB
ID:	8742  
Cbrez is offline   Reply With Quote
Old 03-27-2021, 09:03 PM   #9
rames14
Montana Master
 
rames14's Avatar
 
Join Date: Aug 2004
Location: Livermore
Posts: 5,097
M.O.C. #1920
If you already have disk brakes, the IS install runs about $4000. The warranty on IS is 3 years, vs 1 year on the stock suspension. I discussed this with Keystone. There is not a warranty issue installing IS. I wanted my t’s crossed before I put it on my new 3230CK. The one issue is which brakes you have will determine if you can put on 8000 lb axles or stick to 7000 lb.
__________________
Ron and Terrie Ames - MOC #1920/KF0NTA
2021Montana 3230CK Super Solar Legacy Package
2021 Ram 3500 Laramie Longhorn, BIM Charging
4x4, SRW, LB, Crew Cab, Pullrite 3900 Hitch
rames14 is offline   Reply With Quote
Old 03-28-2021, 05:11 PM   #10
kingdaddy
Montana Master
 
kingdaddy's Avatar
 
Join Date: Dec 2010
Location: Anytown
Posts: 609
M.O.C. #10966
Quote:
Originally Posted by Cbrez View Post
We had them installed when we had a suspension failure on the road. Insurance covered the cost of everything except the Sumo springs since they were considered an upgrade. The four Sumo springs cost us $910 installed.

The OEM springs we replaced all had recurve in them where the axles attached. The Sumo springs act as a shock absorber and give me piece of mind that it wonít happen again. After breaking down on the road I definitely inspect my suspension more than I used to.
Interesting! Couple of questions...did you get specific Sumo Springs for your application (i.e. durometer, length etc.)?
Also, I see that you have the LRE 4000 equalizers judging by the shear spring I see in the photo. Did you have any tears in them or other failures?
Surprised to see the spring failure and "recurve" at the spring mounting points.
I'm interested in what you did for the replacement springs? My trailer is now 10 years old and I might consider going to the Comfort Ride slipper springs soon... however, I just replaced the rubber shear springs and all new Morryde shackles and wet bolts.
thanks!
__________________
2011 Montana 3580RL with a Reese 20k GooseBox w/offset B&W ball, Sailuns, RoadMaster shocks, Splendide stacked washer/dryer, some other stuff...
2015 Ram 3500 DRW Laramie Megacab, Aisin w/3.73s, 255/80 17 Toyos A/T III, rear auto level, 40 gal. fuel/tool combo box, some Banks mods...
kingdaddy is offline   Reply With Quote
Old 03-28-2021, 07:30 PM   #11
Cbrez
Seasoned Camper
 
Cbrez's Avatar
 
Join Date: Mar 2021
Location: Virginia Beach
Posts: 79
M.O.C. #28306
Quote:
Originally Posted by kingdaddy View Post
Interesting! Couple of questions...did you get specific Sumo Springs for your application (i.e. durometer, length etc.)?
Also, I see that you have the LRE 4000 equalizers judging by the shear spring I see in the photo. Did you have any tears in them or other failures?
Surprised to see the spring failure and "recurve" at the spring mounting points.
I'm interested in what you did for the replacement springs?
I donít know the answer to your first question. The tire shop had a Sumo spring display and the technology looked like it made sense so I went for it. I donít know if itís a one size fits all scenario or if itís specific for my particular suspension system.

Both shear springs needed to be replaced. They had extensive cracking, which is very difficult to detect. You have to crawl underneath the axles with a flashlight to inspect.

We considered upgrading the leaf springs but the mechanic said we didnít need to with the Sumo springs, so we replaced the springs in kind.
Cbrez is offline   Reply With Quote
Old 03-30-2021, 07:37 PM   #12
AZMont
Seasoned Camper
 
Join Date: May 2020
Location: Chandler
Posts: 77
M.O.C. #26281
Sumo Springs on my 2015 RL 3100

I put them on about a year ago. Did 2 trips with them. The trailer pulled better, with less sway. However, the ride inside the coach was also a bit harsh. We found things on the floor that typically "stayed put" prior to the sumo spring installation. A couple of drawers bounced open, etc. I took them off, did not want to do any damage to the 5ver due to the stiffer ride.
__________________
AZMont
2020 Ram 3500 MegaCab HO Diesel 4x4 SRW
2015 3100 RL, Onan 4500i inverter/generator
AZMont is offline   Reply With Quote
Old 03-31-2021, 04:32 PM   #13
Mikelff
Montana Fan
 
Join Date: Aug 2020
Location: Keller
Posts: 489
M.O.C. #26851
I am looking at the Sumo springs myself. They are progressive springs and are sized according to the axle rating. Mine are 7000 pound rating and are black. They are 500 pounds resistance at 50% compression, and compress up to 80%. They act similar to shock absorbers and springs as they progressively get stiffer as they compress, so a set of 4 will add 2000 pounds of resistance at 50% compression on my rig. They will stiffen up the ride some, especially as they compress but they do absorb a lot of shock taking stress off your springs. Need to be careful as to how much compression you have when they are installed. They say no more than 1/2 inch compression when static with full weight. More than that I would expect a much stiffer ride and maybe bottom out with less travel. My issue is my propane line runs along the outside edge of the frame so not sure yet if I have enough clearance. Several U-tube videos on them. I have PM a couple people that have them and really like them. I have progressive spring in my front shocks on my motorcycle and they made a huge difference in handling and stopping. Nose dive was gone. If I have the clearance I need I’m likely going to buy them and also install the upgrade shackles and wet bolts.
Mikelff is offline   Reply With Quote
Old 03-31-2021, 05:20 PM   #14
laverdur
Montana Fan
 
Join Date: Nov 2011
Location: Albany
Posts: 401
M.O.C. #11972
No personal experience but i did read in another thread on this forum that someone installed the Sumo springs and then experienced things falling on the floor during a day's drive when that had never happened before. Seems the Sumo springs may have made the ride too stiff. I may be headed for a similar experience because I did a suspension retrofit and used #3500 springs to replace the #3000 ones that sere stock. Time will tell.
__________________
2012 3150RL. G614 tires. Hardwired surge protector. Level-Up Hydraulic leveling.
2013 F-350 Lariat 6.7 PSD SRW SC LB 4X4 OEM hitch, air self-leveling on rear. 57-gallon replacement fuel tank. DieselSite water separator/fuel filter.
laverdur is offline   Reply With Quote
Old 03-31-2021, 05:45 PM   #15
jjwhite368
Montana Fan
 
Join Date: Dec 2020
Location: STUARTS DRAFT, VA
Posts: 140
M.O.C. #27830
Quote:
Originally Posted by als049 View Post
Has anyone used these devices on their Montanas to upgrade/improve the suspension?
Yes, just installed them on my 2021 Montana 3121RL.
__________________
John and Carrie
2021 Montana 3121RL Legacy
2020 F-250 Lariat 4X4 Short 3.55
jjwhite368 is offline   Reply With Quote
Old 09-30-2023, 03:56 PM   #16
Bozo
New Member
 
Join Date: Apr 2020
Location: Chambly
Posts: 2
M.O.C. #26143
Any issue with your propane line, cause on my Montana 3812ms, I do have only 2,3/4in 0f clearance between the line and the limit of the frame, is this enough
Bozo is offline   Reply With Quote
Old 09-30-2023, 06:18 PM   #17
Lee-CI
Montana Master
 
Lee-CI's Avatar
 
Join Date: Dec 2021
Location: Northeast TX
Posts: 868
M.O.C. #30262
We've been running SumoSprings on our MHC for about 6K miles now. The term "shock absorber" can be misleading since the units only assist during compression. The ride quality has been somewhat BETTER vice rougher. Units were one of the first upgrades we completed. There is noticeably less side to side roll on entrance / exit ramps, as well as winding country roads. We've had not one piece of molding or anything else shaken loose druing our trips. I can recommend the install, but don't expect miracles.

As for MORryde Independent Suspension causing issues with potential warranty claims, the suspension is an optional FACTORY upgrade on 2024 units for all models - not merely Legacy models. This info came straight from the Montana manager at the Fall rally and factory tour.
__________________
Lee, Edith & Lil' Bit the furry feline alarm clock
22 MHC 331RL, Surge Guard 35550, SumoSprings, Kodiak disc brakes, 412Ah Lithium, Gen 3 Goosebox
22 Ram 3500 CC DRW 6.7 CTD Herrin Hauler Classic Bed, 45 gal AUX tank
Lee-CI is offline   Reply With Quote
Old 09-30-2023, 08:17 PM   #18
Mikelff
Montana Fan
 
Join Date: Aug 2020
Location: Keller
Posts: 489
M.O.C. #26851
Quote:
Originally Posted by Bozo View Post
Any issue with your propane line, cause on my Montana 3812ms, I do have only 2,3/4in 0f clearance between the line and the limit of the frame, is this enough
You may need to move your gas line an inch or two to make room for the sumo springs. They move the gas line to the inside edge of the frame. My dealer has done several installs moving that gas line with no issues. This will give you approximately 4 to 4 1/2 inches of clearance for the 3Ē diameter sumo springs. So yes, it is possible to move the gas line.
Mikelff is offline   Reply With Quote
Old 10-13-2023, 05:52 PM   #19
dlowrey
Established Member
 
Join Date: Apr 2023
Location: Las Vegas
Posts: 13
M.O.C. #32586
Bozo,
I believe my clearance issue with the propane line is the same as yours. Did you install the Sumos. Did you have to move the propane line?
Thanks
-DL
dlowrey is offline   Reply With Quote
Old 10-13-2023, 06:09 PM   #20
Mikelff
Montana Fan
 
Join Date: Aug 2020
Location: Keller
Posts: 489
M.O.C. #26851
dlowtey, you will need at least 4” of clearance for the Sumo Springs. You will most likely have to move your gas line. Typically it is moved and anchored to the inside edge of the frame rail which will give you approximately 4” to almost 4.75” of clearance. If you travel often and use the RV frequently, It’s probably worth the expense. I had a friend who is a plumber help me with mine. He had the tools and pipe parts which really helped. Takes two guys to manage the bulky length of the pipe and remount re using the mounting hardware that came with the RV. Otherwise I would have had the dealer install them. Happy trails.
Mikelff is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 11:15 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2023, vBulletin Solutions, Inc.